Skocz do pozycji: 1.

Tytuł:

Średni ciężar atomowy chondrytu Sołtmany, chondrytów L6 i minerałów pozaziemskich
Mean atomic weight of Sołtmany chondrite, L6 chondrites and extraterrestrial minerals

Autorzy:

Szurgot, Marian

Powiązania:

https://bibliotekanauki.pl/articles/1033038.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Girgenti chondrite
Holbrook chondrite
Jesenice chondrite
Leedey chondrite
Modoc chondrite
Sołtmany chondrite
chondrites
elemental composition
grain density
mean atomic weight

Opis:

Mean atomic weight Amean of Sołtmany (L6, S2, W0) ordinary chondrite, various L6 chondrites such as: Jesenice, Girgenti, Leedey, Bruderheim, Holbrook and Modoc, as well as LL, L and H chondrites has been determined using literature data on chemical composition of the meteorites. Relationship between mean atomic weight and Fe/Si atomic ratio for ordinary chondrites has been established. It was shown that Sołtmany’s Amean = 23.97 is close to mean atomic weight of L chondrites Amean = 23.70, and is close to mean atomic weight of L6 chondrites Amean = 24.06±0.16. It has been established that Sołtmany’s Fe/Si atomic ratio (Fe/Si = 0.588) is close to Fe/Si ratio for L6 chondrites (Fe/Si = 0.598). This means that Sołtmany belongs to L6 chondrites, as previously classified. Using discovered by the author (Szurgot, 2015) dependence between mean atomic weight and uncompressed density of planetary matter it was established that grain density of Sołtmany meteorite should be equal to 3.56±0.12 g/cm3, which is about 4% lower than previously estimated by porosity data. Mean atomic weight of extraterrestrial minerals present in ordinary chondrites and in Sołtmany meteorite have been also determined.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2015, 6; 107-128
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Northwest Africa 7915: A New approved LL5 chondrite from Morocco

Autorzy:

Brawata, M.
Kryza, R.
Jakubowski, T.
Przylibski, T. A.
Ćwiąkalski, J.
Łuszczek, K.

Powiązania:

https://bibliotekanauki.pl/articles/411506.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

chondrite
NWA 7915
Morocco
chondrule
chondrite chemistry
chondrite weathering

Opis:

A 415 g single meteorite was purchased in 2010 by T. Jakubowski from a dealer in Morocco. The meteorite was isometric in shape, ca. 8 cm in size, with distinct regmaglypts on the original ablated surface, and covered mostly in primary crust with one broken surface. The weight of the sample studied was 69 g. The meteorite is composed of several types of chondrules including porphyritic-Ol-Px, barred-Ol, radial-Px, granular and cryptocrystalline with distinct and diffused (not sharp) boundaries, and opaque grains and aggregates, enclosed in a very fine-grained matrix. The average compositions of minerals are: olivine (both in chondrules and matrix) − Fo70.4Fa29.1Te0.5, pyroxenes, represented by Mg-Fe (Ca-poor) orthopyroxene (and minor clinopyroxene?) − En73.9Fs24.1Wo2.0, feldspars (small in the matrix and in barred chondrules), with An12-37, and Or~3-4, taenite − Fe 70.80, Ni 25.50 and Co 1.67 wt. %, troilite − Fe0.98S1.00, chromite (Fe2+ 0.96Mg0.12Mn0.01Zn0.01) (Cr1.52Al0.23Fe3+ 0.02Ti0.10Si0.02)O4; altered accessory minerals including apatite and iron-rich secondary phases have also been identified and analyzed. The meteorite is of petrologic type 5, as evidenced by the observed recrystallization of the matrix, relatively good preservation of the chondrule structures, homogeneous composition of olivine and pyroxene, and the presence of only secondary small feldspar grains. The shock stage, S2, is based on the presence of undulatory extinction and irregular fractures in olivine crystals. The weathering grade, W3, is confirmed by the observation that kamacite is totally altered into secondary iron phases, whereas Nirich taenite, and troilite are only partly weathered. The specimen shows many bulk- and mineral-chemical parameters corresponding, mostly, to the LL chondrite group (e.g., Fe/SiO2 0.49, SiO2/MgO 1.62, Fa in olivine 29.05). However, concentrations of several other elements, including REE, are not fully consistent with the average values for the LL ordinary chondrites. Apparently, the parent body of the studied NWA 7915 meteorite was depleted in Dy, Tm, and Yb, compared to typical LL-type ordinary chondrite parent bodies. Also, relatively high concentrations of other elements, including Ba and Sr, have been measured, which may result from terrestrial weathering in hot desert conditions. The meteorite has been classified as LL5 ordinary chondrite, S2, W3, and registered in the Meteoritical Society database as NWA 7915. The type specimen is deposited in the Mineralogical Museum of the University of Wrocław.

Źródło:

Meteorites; 2014, 3, No. 1-2; 45-58
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Nowy chondryt zwyczajny H5, S2, W1: Northwest Africa 11778
A new ordinary chondrite H5, S2, W1: Northwest Africa 11778

Autorzy:

Przylibski, Tadeusz
Łuszczek, Katarzyna
Kryza, Ryszard
Blutstein, Konrad

Powiązania:

https://bibliotekanauki.pl/articles/1033153.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

H5 chondrite
NWA chondrite
bulk chemistry
chemistry of minerals
meteorite
ordinary chondrite

Opis:

Based on petrological, mineralogical and geochemical analyses, the authors classified the new meteorite Northwest Africa 11778 as an ordinary chondrite H5, S2, W1. It is a single stone with mass 767.5 g and with well-preserved black fusion crust with brown shade (Fig. 1). This meteorite was found in Sahara Desert and it was purchased by Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology from Moroccan dealer in Zagora in June 2013. The most characteristic component of analyzed chondrite are different types of chondrules (barred olivine – BO, porphyritic olivine – PO, granular olivine – GO, radial pyroxene – RP, porphyritic olivine-pyroxene – POP, cryptocrystalline – C) (Fig. 2), which constitute 75% of meteorite. Their size is in range 0.2–1.2 mm, with average chondrule size ca. 0.6 mm. Bigger porphyritic olivine chondrules with diameter up to 1.5 mm rarely occur. The chemical composition of olivine crystals (Fa 18 mol%) and pyroxene crystals (Fs 16.2 mol%) proves this meteorite to be an H chondrite (Tab. 1, Fig. 4–5, App. 1–2). The averaged concentration of major elements in the classified meteorite is comparable to their mean content in H chondrites (Fig. 8). The meteorite NWA 11778 contains only slightly less Mg and Al than average H chondrites (Tab. 2). Among the other analysed elements, values distinctly out of the range of typical concentrations for H chondrites are characteristic of Hg and Eu (lower concentration in the NWA 11778 meteorite) (Tab. 3, Fig. 8–9). The presence of chondrules with predominantly sharp boundaries (Fig. 2), secondary feldspar crystals with sizes of up to 50 mm, chiefly crystalline mesostasis and only secondarily – devitrified glass in chondrules, and transparent crystalline matrix (with olivine crystals up to 0.26 mm and pyroxenes up to 0.30 mm in size), as well as common occurrence of untwinned rhombic pyroxenes prove the classified meteorite to belong to petrological type 5. It is additionally confirmed by mean Ni content in troilite below 0.5 wt% (0.04 wt%) (Tab. 1, App. 4) and carbon content below 0.2 wt% (0.07 wt%) (Tab. 2). Undulatory extinction in some olivine and pyroxene crystals and the presence of irregular fractures in the NWA 11778 chondrite enables specifying its shock level as S2. The weathering grade adopted for the NWA 11778 chondrite was W1, as visible weathering changes cover only the marginal parts of FeNi alloy grains. As a result of the weathering of 10–20% of FeNi grains, iron oxides and hydroxides are formed. These secondary weathering Fe3+ compounds also fill cracks, forming veins running between chondrules within matrix (Fig. 3).

Źródło:

Acta Societatis Metheoriticae Polonorum; 2020, 11; 77-97
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:

Nowy chondryt zwyczajny L6, S1, W1: Northwest Africa 11779
A new ordinary chondrite L6, S1, W1: Northwest Africa 11779

Autorzy:

Przylibski, Tadeusz A.
Łuszczek, Katarzyna
Kryza, Ryszard

Powiązania:

https://bibliotekanauki.pl/articles/1033133.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

L6 chondrite
NWA chondrite
bulk chemistry
chemistry of minerals
meteorite
ordinary chondrite

Opis:

Based on petrological, mineralogical and geochemical research authors classified new meteorite Northwest Africa 11779 as the ordinary chondrite L6, S1, W1. Chemical composition of olivine crystals (Fa 24.9 mol.%) and of pyroxene crystals (Fs 19.4 mol.%) proved that this meteorite belongs to L chondrites. However, bulk chemical composition of NWA 11779 is not typical for L chondrites. Nevertheless, all analyzed elements (except Mo, Sn and Nb) are in abundances reported for L chondrites, some of elements have concentration closed to average abundances for L chondrites. The content of chosen, characteristic lithophile, siderophile and chalkophile elements in NWA 11779 chondrite is in most cases in accord with its typical abundance in L chondrites. Presence of poorly defined chondrules, secondary feldspar crystals larger than 50 µm in size, absence of glass within chondrules, coarse recrystallized matrix (with olivine crystals of 0.5 mm in diameter and pyroxene crystals of 0.3 mm in diameter) as well as carbon content below 0.2 wt% proved that studied meteorite belongs to the petrologic type 6. The only difference from characteristic features of petrologic type 6 in case of NWA 11779 chondrite is presence of ca. 10% of monoclinic Ca-poor pyroxenes. Undulatory extinction by olivine and absence of other shock features in this chondrite allow to determine the shock level as S1. Weathering grade of NWA 11779 was identified as W1 based on weathering of only FeNi alloy grains. The outer part of metallic grains as well as contact zones of FeNi and FeS are changed due to weathering. Between 10 and 20% of FeNi alloy grains are oxidized to iron oxides and hydroxides. These secondary products of weathering replace outer zone of FeNi grains and fill the small cracks, creating a few thin veins.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2019, 10; 121-139
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:

Mineralogy and petrology of two ordinary chondrites and their correlation with other meteorites

Autorzy:

Owocki, K.
Pilski, A.

Powiązania:

https://bibliotekanauki.pl/articles/2086559.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

ordinary chondrite
type 6 chondrite
shock metamorphism
Dhofar

Opis:

Two ordinary chondrites are compared and classified using transmitted and reflected light microscopy and electron microprobe analyses. Both meteorites were confiscated by the Polish Customs Service at the border with Belarus. The first meteorite (called in this paper Terespol-1) is a L/LL6 chondrite, its classification being supported by the equilibrated compositions of olivine and orthopyroxene and the presence of large recrystallized feldspars (< 150 μm). The specimen examined experienced weak shock metamorphism (S3) and moderate weathering (although metal in the inner part of the meteorite seems to be unaffected by oxidization). The other meteorite (called in this paper Terespol-2) is a LL6 chondrite which experienced weak shock metamorphism (S3) and is unaffected by weathering. The Terespol-2 meteorite shares its classification with the Dhofar 1401 chondrite but the lack of data prevents further correlation. Both meteorites have been correlated with known findings from the Meteoritical Bulletin database and an attempt is made to identify their place of origin (fall event). Results indicate that Terespol-1 is most closely related to the Dhofar 1316 chondrite and we suggest that both meteorites at least came from the same parent body.

Źródło:

Mineralogia; 2009, 40, 1/4; 107--116
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:

Mineralogy and petrology of two ordinary chondrites and their correlation with other meteorites

Autorzy:

Owocki, Krzysztof
Pilski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/2086510.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Mineralogiczne

Tematy:

ordinary chondrite
type 6 chondrite
shock metamorphism
Dhofar

Opis:

Two ordinary chondrites are compared and classified using transmitted and reflected light microscopy and electron microprobe analyses. Both meteorites were confiscated by the Polish Customs Service at the border with Belarus. The first meteorite (called in this paper Terespol-1) is a L/LL6 chondrite, its classification being supported by the equilibrated compositions of olivine and orthopyroxene and the presence of large recrystallized feldspars (< 150 μm). The specimen examined experienced weak shock metamorphism (S3) and moderate weathering (although metal in the inner part of the meteorite seems to be unaffected by oxidization). The other meteorite (called in this paper Terespol-2) is a LL6 chondrite which experienced weak shock metamorphism (S3) and is unaffected by weathering. The Terespol-2 meteorite shares its classification with the Dhofar 1401 chondrite but the lack of data prevents further correlation. Both meteorites have been correlated with known findings from the Meteoritical Bulletin database and an attempt is made to identify their place of origin (fall event). Results indicate that Terespol-1 is most closely related to the Dhofar 1316 chondrite and we suggest that both meteorites at least came from the same parent body.

Źródło:

Mineralogia; 2009, 40, 1/4; 107--116
1899-8291
1899-8526

Pojawia się w:

Mineralogia

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:

Chondryty węgliste CI oraz podobne do CI
CI and CI-like carbonaceous chondrites

Autorzy:

Blutstein, Konrad

Powiązania:

https://bibliotekanauki.pl/articles/30146491.pdf

Data publikacji:

2024-04

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

carbonaceous chondrite
meteorite
CI chondrite
CY chondrite
chondryt węglisty
meteoryt
chondryt CI
chondryt CY

Opis:

Carbonaceous chondrites of the CI group represent the most primitive matter in the Solar System available for study. Currently, only 9 meteorites have been classified as CI group carbonaceous chondrites, with the classification of two of them being questioned. In the literature, there is a suggestion to consider these two meteorites, along with others that share similarities, as a separate CY group. Additionally, the Tagish Lake meteorite is considered CI2, although this classification has not gained widespread acceptance. Based on a limited number of scientific sources regarding the elemental composition of CI group carbonaceous chondrites and CI-like chondrites, it has been observed that Alais, Ivuna, and Orgueil chondrites have the most similar elemental composition. The composition of the Tonk chondrite differs slightly but still falls within the typical range for CI group chondrites. The chemical composition of the Revelstoke meteorite significantly deviates from the average composition of CI group chondrites; however, the small mass of this meteorite (1 g) and a lack of sufficient data may affect the results. Among CI-like chondrites, the best match in chemical composition to CI chondrites is found for the Tagish Lake chondrite. Conversely, the Belgica 7904 chondrite, previously considered a member of the potential CY group, unequivocally does not belong to CI or CY group based on its chemical composition. While potential CY chondrites exhibit significant cadmium depletion, the possibility of coincidental convergence on this matter cannot be excluded. From a mining perspective, parent bodies of CI group carbonaceous chondrites may serve as a potential source of water and, consequently, hydrogen, holding significant importance as potential fuel. Asteroid 1508 Kemi, which is a potential parent body of CI carbonaceous chondrites, may contain about 3.39·1012 Mg of water, including about 3.76·1011 Mg of hydrogen.
Chondryty węgliste z grupy CI stanowią najbardziej pierwotną materię w Układzie Słonecznym dostępną do badań. Obecnie tylko 9 meteorytów zostało sklasyfikowanych jako chondryty węgliste grupy CI, z czego dla dwóch z nich klasyfikacja ta jest kwestionowana. W literaturze sugeruje się, aby te dwa meteoryty, wraz z innymi podobnymi, uznać za osobną grupę CY. Dodatkowo, meteoryt Tagish Lake jest rozważany jako CI2, chociaż ta klasyfikacja nie zdobyła powszechnej akceptacji. Na podstawie ograniczonej ilości źródeł literaturowych dotyczących składu pierwiastkowego chondrytów grupy CI oraz chondrytów podobnych do CI, stwierdzono, że chondryty Alais, Ivuna oraz Orgueil mają najbardziej zbliżony skład pierwiastkowy. Skład chondrytu Tonk różni się nieznacznie, ale wciąż mieści się w zakresie typowym dla chondrytów grupy CI. Skład chemiczny meteorytu Revelstoke znacząco odbiega od średniego składu chondrytów grupy CI, jednak niewielka masa tego meteorytu (1 g) i brak dostatecznej ilości danych mogą wpływać na wyniki. Spośród chondrytów podobnych do CI, najlepsze dopasowanie składu chemicznego do grupy CI wykazuje chondryt Tagish Lake. Natomiast najgorsze dopasowanie charakteryzuje chondryt Belgica 7904, uważany za członka potencjalnej grupy CY, jednak na podstawie składu chemicznego jednoznacznie można stwierdzić, że nie należy do grupy CI lub CY. Chociaż potencjalne chondryty CY wykazują znaczne zubożenie w kadm, nie można wykluczyć przypadkowej zbieżności w tej kwestii. Z perspektywy górniczej, ciała macierzyste chondrytów węglistych grupy CI mogą stanowić potencjalne źródło wody, a co za tym idzie, również wodoru, mającego istotne znaczenie jako potencjalne paliwo. Planetoida 1508 Kemi będąca potencjalnym ciałem macierzystym chondrytów węglistych grupy CI może zawierać około 3,39·1012 Mg wody, w tym około 3,76·1011 Mg wodoru.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2024, 15; 7-26
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Wyniki badań mineralogicznych i petrologicznych nowych okazów meteorytu Pułtusk w 150 rocznicę spadku
Results of mineralogical and petrological research of new samples on the Pułtusk meteorite at the 150th anniversary of the fall

Autorzy:

Przylibski, T. A.
Łuszczek, K.

Powiązania:

https://bibliotekanauki.pl/articles/2075816.pdf

Data publikacji:

2018

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

Pułtusk
meteoryt
chondryt
zwyczajny chondryt
chondryt H5
meteorite
chondrite
ordinary chondrite
H5 chondrite

Opis:

One of the largest observed stone meteorite shower in the history of mankind on Earth took place on Thursday evening on January 30, 1868, about seven o’clock near Pułtusk in Poland. Despite the 150th anniversary of the fall of chondrite officially classified as Pułtusk H5 with a shock stage S3 there is still little published data on the chemical composition of minerals of this chondrite as well as its petrological characteristics in the literature. The authors carried out mineralogical and petrological research that will help a little to fill this gap in knowledge about the Pułtusk chondrite. Meteorite specimens found by Piotr Kuś in 2015 and investigated by the authors are undoubtedly part of the Pułtusk fall of January 30, 1868. They can be classified as ordinary chondrite H5, S2,W2. The authors stated that the studied rock is characterized by a varied shock level -from S1 to S2/3, as well as it contains chondrules of the chromite-plagioclase unequilibrated rock. In the composition of the examined fragment of Pułtusk chondrite, the authors identified silicates: olivine, diopside, bronzite and clinohyperstene, and oligoclase, oxides: chromite (and spinel), sulfides: troilite, FeNi alloy mineral phases: kamacite and taenite, as well as phosphates: merrilite and apatite. The chemical composition of olivine crystals as well as low- and high-Ca pyroxenes crystals and plagioclase crystals (about the composition of oligoclase) confirms that the examined specimen comes from the Pułtusk fall and it is a rock that should be classified as a petrographic type H5.

Źródło:

Przegląd Geologiczny; 2018, 66, 6; 368--378
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Średni ciężar atomowy, średnia objętość i promień atomu chondrytu Creston (L5/6)
Mean atomic weight, mean volume and radius of atom of Creston (L5/6) chondrite

Autorzy:

Szurgot, Marian

Powiązania:

https://bibliotekanauki.pl/articles/30146488.pdf

Data publikacji:

2024-04

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Creston chondrite
Ensisheim chondrite
Jezersko chondrite
mean atomic weight
mean volume of atom
mean radius of atom

Opis:

Mean atomic weight Amean, mean volume and mean radius of atom of Creston ordinary chondrite (L5/6 S4 W0) felt in 2015 in Creston near Paso Robles, California has been calculated using literature data on chemical composition of the meteorite (Jenniskens et al. 2019). The aim of the studies was to determine Amean, Vatom, and Ratom values for this new meteorite, and compare the data with the values obtained for two other ordinary chondrites: Ensisheim (LL6), and Jezersko (H4). Calculations were conducted for the whole rock, for silicates, and for Fe, Ni metal of Creston, and Ensisheim chondrites. It was shown that the mean atomic weight of the whole rock of Creston chondrite Amean = 24.06. Creston’s silicates revealed the value: Ameansi = 21.92, and Creston’s Fe,Ni metal: Ameanmet = 56.25. It was calculated that the average volume of the Creston’s atom Vatom = 1.111·10–29 m3 (sample CR05), and 1.115·10–29 m3 (sample CR06). Average radius of Creston’s atom: Ratom = 138.5 pm, mean radius of atom of Creston silicates: Ratomsi = 138 pm, and mean radius of atom of Creston metal: Ratommet = 142 pm.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2024, 15; 116-128
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:

Bulk chemical composition of Sołtmany chondrite

Autorzy:

Przylibski, T. A.
Łuszczek, K.

Powiązania:

https://bibliotekanauki.pl/articles/411498.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

meteorite
ordinary chondrite
L-chondrite
bulk composition
meteorite fall
observed fall

Opis:

The authors examined the bulk chemical composition of the Sołtmany chondrite which fell on April 30th, 2011 in Northern Poland. Based on the analysis of 47 elements, it was concluded that Sołtmany is representative of L-type of ordinary chondrites. However, compared to the average values observed in other L-type ordinary chondrites, Sołtmany displays higher content of Ni, P, Cd, Pb, and As. The Ni and P content closely resembles typical values for H-type ordinary chondrites. Furthermore, Sołtmany displays other distinct properties including very low Zn content and lower contents of Mo and Zr than the average values found in other L-type ordinary chondrites. Consistent with other L-type ordinary chondrites, the absolute content of REE in Sołtmany is higher than that of CI-type carbonaceous chondrites while the REE trend lines for both Sołtmany and CI-chondrites are similar. Due to similar times of year of when both falls took place and the proximity of their strewn fields, the chemical composition of Sołtmany was compared with that of Jesenice, an L6 ordinary chondrite which fell on April 9th, 2009 in Europe. The analysis led to a conclusion that Sołtmany and Jesenice are not launch-paired. Nevertheless, even though they do not represent fragments of the same meteoroid, their origin on a common parent body (an asteroid – planetesimal) cannot be conclusively ruled out on the sole basis of their bulk chemical composition.

Źródło:

Meteorites; 2012, 2, No. 1-2; 31-37
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

Nowe polskie znalezisko, Częstochowa
A new Polish find, Częstochowa

Autorzy:

Woźniak, Beata
Woźniak, Marek

Powiązania:

https://bibliotekanauki.pl/articles/1033140.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

new meteorite
ordinary chondrite

Opis:

The history of finding another Polish meteorite. The process of meteorite preparation for research and classification. Making 3D copies of the specimen and cutting it.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2019, 10; 193-198
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Średni ciężar atomowy chondrytu Ensisheim (LL6)
Mean atomic weight of Ensisheim LL6 chondrite

Autorzy:

Szurgot, Marian

Powiązania:

https://bibliotekanauki.pl/articles/1033088.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Ensisheim chondrite
LL6 chondrite
grain density
iron to silicon ratio
mean atomic number
mean atomic weight
ordinary chondrite

Opis:

Mean atomic weight Amean of Ensisheim (LL6, fall 1492) ordinary chondrite has been determined using literature data on chemical composition of the meteorite and using relationships: between mean atomic weight and Fe/Si atomic ratio, between Amean and grain density, and between Amean and magnetic susceptibility (Szurgot 2015a–f, 2016a, b, d, e). It was shown that Ensisheim’s Amean = 23.32, and 23.06 for composition without water, and with H2O, respectively. These values are close to the mean atomic weight of LL chondrite falls (Amean = 23.36, and 23.03), and are close to Amean values of LL6 chondrite falls (Amean = 23.30, and 23.06, Szurgot 2016b). Ensisheim’s Fe/Si atomic ratio (0.509) leads to Amean = 23.16±0.12 which is close to the values determined by bulk composition. This means that Ensisheim belongs to LL6 chondrites, as previously classified (Jarosewich i Dodd 1985). Using dependence between mean atomic weight and grain density (Szurgot 2015a–c, 2016d) leads to Amean = 23.70±0.54 (dgr = 3.52±0.04 g/cm3, Macke 2010), and using dependence between Amean and magnetic susceptibility (Szurgot 2016a, d) gives Ameanc = 22.78±0.24 (logc = 4.15±0.09, Macke 2010). Arithmetic mean Amean (dgr) and Amean (logc) gives 23.24±0.65, and arithmetic mean of Amean (dgr), Amean (logc), and Amean(Fe/Si), gives 23.21±0.46 values close each other, and close to Amean(bulk composition) determined using compositional data. Mean atomic number Zmean, and Amean/Zmean ratio of the meteorite have been also determined. Ensisheim’s Zmean = 11.51 for composition without H2O, and 11.40 for composition with H2O. Amean/Zmean ratios are: 2.026 and 2.023, for composition without water, and with H2O, respectively. Ensisheim’s silicates shown values: Amean = 22.19, Zmean = 10.97, Amean/Z mean = 2.022, Fe/Si = 0.355, Amean(Fe/Si) = 22.28, and Fe, Ni metal values: Amean = 57.26, Zmean = 26.96, and Amean/Z mean = 2.124.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2017, 8; 110-122
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Nowy chondryt z Libii
New chondrite from Libya

Autorzy:

Abu Anbar, Mohamed
Kryza, Ryszard
Przylibski, Tadeusz A.
El Bahariya, Gaafar

Powiązania:

https://bibliotekanauki.pl/articles/1032649.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

meteorite fall
meteorites
ordinary chondrite

Opis:

On Saturday, 21 of May, 2006, a fall was observed and the stony meteorite was found in a small crater on an apple farm at Werdama village, near Al Beda town in Libya. Based on preliminary examinations, the authors described the meteorite as an ordinary chondrite. Further research aiming at full characteristics, classification and registration of the meteorite is in progress.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2009, 1; 9-12
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Reklasyfikacja chondrytu zwyczajnego Sahara 02500

Autorzy:

Owocki, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/1032819.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Sahara 02500
meteorites
ordinary chondrite

Źródło:

Acta Societatis Metheoriticae Polonorum; 2011, 2; 192
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:

Reklasyfikacja meteorytu Pułtusk

Autorzy:

Pilski, Andrzej S.
Karwowski, Łukasz
Siemiątkowski, Jacek

Powiązania:

https://bibliotekanauki.pl/articles/1032861.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Pułtusk meteorite
meteorites
ordinary chondrite

Źródło:

Acta Societatis Metheoriticae Polonorum; 2011, 2; 194
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Klasyfikowanie chondrytów zwyczajnych – kolejność prac, metody badań, sprawy formalne i inne problemy

Autorzy:

Przylibski, Tadeusz A.
Kryza, Ryszard
Pilski, Andrzej S.

Powiązania:

https://bibliotekanauki.pl/articles/1032862.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

meteorite classification
meteorites
ordinary chondrite

Źródło:

Acta Societatis Metheoriticae Polonorum; 2011, 2; 195-196
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Charakterystyka petrologiczna i chemiczna meteorytu Antonin – klasyfikacja oraz zarys historii termicznej i uderzeniowej
Petrology and chemistry of the Antonin meteorite – classification and reconstruction of thermal-collisional history

Autorzy:

Krzesińska, Agata

Powiązania:

https://bibliotekanauki.pl/articles/2195010.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Antonin
L5 chondrite
meteorite

Opis:

Meteorite Antonin fell on 15th July 2021 in Poland. The bolide was observed and recorded by cameras of European Bolide Network, Astronomical Institute of Czech Academy of Sciences. Soon after the fall, specimen of meteorite was recovered and delivered for classification. In this paper, analytical results collected in order to classify the Antonin meteorite are reported. Antonin is L5 ordinary chondrite with deformation degree S3 or S4. This paper includes reports of heterogeneous texture of chondrite and reports on chemical composition of minerals: olivine, low-Ca pyroxene, diopside and glasses, phosphates, chromite and ilmenite, as well as sulfides and native FeNi alloy. The minerals reveal different equilibration degree. Analysis of the texture and chemical composition of Antonin allows to put the meteorite in the framework of current classification of meteorites. It also facilitates making hypotheses on the thermal and collisional processes, that the meteorite experienced while on its parent body.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2023, 14; 114-133
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Sołtmany meteorite

Autorzy:

Karwowski, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/411492.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

meteorite
ordinary chondrite
L6 chondrite
meteorite fall
hammer meteorite
Warmia-Masuria Province
Sołtmany village

Opis:

This paper presents the results of a mineralogical and petrological study of the Sołtmany meteorite, which fell on April 30, 2011 in northern Poland. The meteorite was found almost immediately after it fell and has been little altered by weathering. Sołtmany is not the only observed fall of an L6 chondrite over Europe in the past few years. The preceding fall of this type, Jesenice (Slovenia), was also witnessed in April of 2009. However, it was not until several weeks after the fall that the first specimen of Jesenice was found, whereas Sołtmany was collected after a few minutes and submitted for analysis within a couple of days. The author presents mineral and petrographic features and chemical characteristics of mineral phases in Sołtmany. The mineral components are represented by metallic phases (kamacite, taenite, tetrataenite, native copper), as well as chromite, olivine, low and high-calcium pyroxene, feldspar, chlorine-bearing apatite, and merrillite. This study also describes the texture of the meteorite and takes notice of a low number of preserved chondrules and the presence of oval chondrule like areas, which exhibit a metamorphosed, recrystallized texture. Sołtmany was classified as an L6 ordinary chondrite with a weathering grade of W0. A shock stage S2 was determined on the basis of undulose extinction and lack of planar fractures in olivine crystals.

Źródło:

Meteorites; 2012, 2, No. 1-2; 15-30
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Kopalne ordowickie chondryty – przegląd danych
Fossil ordovician chondrites – a review

Autorzy:

Brachaniec, Tomasz
Brom, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/1033024.pdf

Data publikacji:

2015

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Ordovician
Osterplana
Sweden
chondrite
fossil meteorite

Opis:

The largest group of fossil meteorites are L type chondrites, found in the Middle Ordovician limestones in Sweden. Until now, 101 specimes were discovered. Probably, they come from collisions in the asteroid belt. They are completely altered, except the chromite grains.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2015, 6; 23-25
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

A new classification of Nyirábrany, an ordinary chondrite from Hungary

Autorzy:

Mészáros, M.
Kereszturi, A.
Ditrói-Puskás, Z.

Powiązania:

https://bibliotekanauki.pl/articles/411486.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

chondrite
classification
L and LL chondrites.

Opis:

The Nyirábrany meteorite is an ordinary chondrite from Hungary that fell in 1914 and, to date, has been studied very little. The aim of this work was to carry out a more detailed examination of this meteorite (using optical polarization microscope, energy dispersive X-ray spectroscopy and Raman micro spectroscopy) and re-investigate its previous classification as an LL5 type ordinary chondrite, moreover to complete its classification with a shock stage and a weathering grade. Our new results indicate that Nyirábrany could be a transition type between the L and LL chondrites. The main mineral phases of Nyirábrany are olivine, pyroxene and opaque minerals (e.g. Fe-Ni metal, troilite, chromite), minor constituents are plagioclase, Cl-apatite, cristobalite and glass. The Fe-Ni metal content (1.32 vol%) of Nyirábrany is typical of the LL group, the Fa content of olivines (26.71 mol%) is between the range of the L and LL types, while the Fs-content of the low-Ca pyroxenes (20.51 mol%) is typical of the L-chondrites. Chondrules appear in different sizes, mineral compositions and textures. The textural and mineralogical features (e.g. mostly homogeneous silicate minerals, dominance of clinopyroxenes, recrystallized matrix, well-defined chondrules) indicate petrological type 4-5 for Nyírábrány. The shock stage and the weathering grade of this meteorite were examined for the first time. On the basis of the observed optical and textural features of the olivine grains (e. g. sharp optical extinction, irregular and planar fractures) Nyirábrany has an S2 shock stage. About 30–40% of the opaque phases are affected by oxidation, which shows a W2 weathering grade.

Źródło:

Meteorites; 2014, 3, No. 1-2; 19-32
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Skład chondrytów zwyczajnych a potencjalne surowce pasa planetoid
Composition of Ordinary Chondrites and Potential Natural Resources of Asteroid Belt

Autorzy:

Łuszczek, Katarzyna
Przylibski, Tadeusz A.

Powiązania:

https://bibliotekanauki.pl/articles/1032729.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Fe-Ni alloy
asteroid
asteroid belt
chondrite
extraterrestrial resource
meteorite
meteorites
natural resource
ordinary chondrite
troilite

Opis:

In this article the authors present a simple method of determining the content of selected metal raw materials (Fe, Ni, Co) on the parent bodies of ordinary chondrites. Thanks to the use of planimeter for measuring, under microscope, polished slices of meteorites, it is possible to estimate quite accurately the proportion of these metals in the parent bodies of meteorites, i.e. on asteroids. When it comes to analysing a large number of polished slices, these results will be most likely comparable to much more expensive results of chemical tests conducted on meteorites. Based on the analysis of 16 thin polished sections and polished slices of 11 ordinary chondrites, the authors found out that the highest content of Fe, Ni and Co ore minerals, reaching 10,06% of the total volume, can be found in ordinary chondrites from group H. For ordinary chondrites from groups L and LL, it makes 3,86% and 3,93% of the volume respectively. Employing the results of chemical analyses available in literature sources, the authors also estimated the size of Fe, Ni and Co resources for several selected asteroids. These bodies contain higher concentrations of iron, nickel and cobalt than terrestrial deposits (those found in the earth’s crust). The total content of Fe on parent bodies of even the most deficient in metals group LL of ordinary chondrites is about twice as high as that in the earth’s crust. Cobalt occurs on parent asteroids of ordinary chondrites in concentrations 15–24 times as high as those in the earth’s crust, and the concentrations of Ni are 100–180 times as high as those in the earth’s crust. The contents of these metals on parent asteroids of ordinary chondrites are also several times as high as those in currently extracted deposits in the earth’s crust. Taking into account the mean annual terrestrial production of these metals, the authors have estimated that a parent asteroid of ordinary chondrites with the size between 433 Eros and 6 Hebe could satisfy our need for Fe, Ni and Co for the nearest several million to dozens of billion years. Considering the fact that asteroid belt contains plenty of such objects, and as many asteroids built chiefly of Fe-Ni alloy, one should regard this section of the Solar System as a practically inexhaustible source of metal raw materials. The prospect of their exploitation is probably much nearer than we can currently imagine.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2011, 2; 92-111
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 22.

Tytuł:

Planimetrowanie ziaren FeNi jako metoda ustalenia stopnia wietrzenia W0–W4 chondrytów zwyczajnych
FeNi grains planimetry as a method to establish weathering grade W0–W4 of ordinary chondrites

Autorzy:

Przylibski, Tadeusz A.
Łuszczek, Katarzyna
Blutstein, Konrad

Powiązania:

https://bibliotekanauki.pl/articles/1033132.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

FeNi alloy weathering
Wlotzka scale
meteorite
ordinary chondrite
ordinary chondrite weathering
ordinary chondrites weathering scale
weathering grade

Opis:

Wlotzka scale (Wlotzka 1993) is commonly used to determine the weathering grade of ordinary chondrites. The scale is descriptive and based mostly on a subjective assessment of researcher. In this paper authors define a new, quantitative method to establish the W0–W4 weathering grade, which is based on planimetry of FeNi grains. Results of planimetry are compared with average content of FeNi metal in unweathered chondrites from the same group. Weathering grade estimated by this method are consistent with, or slightly different from the official one determined in classification, what proves the efficacy of the proposed method. Moreover, the method was applied to define weathering grade of meteoritic samples not classified so far: Pułtusk (W2), Thuathe (W2), Gao-Guenie (W2/W3), NWA 5205 (W3), NWA 4505 (W3), NWA 5296 (W2).

Źródło:

Acta Societatis Metheoriticae Polonorum; 2019, 10; 111-120
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 23.

Tytuł:

Średni ciężar atomowy chondrytów LL5: Siena, Hautes Fagnes i NWA 7915
Mean atomic weight of LL5 chondrites: Siena, Hautes Fagnes and NWA 7915

Autorzy:

Szurgot, Marian

Powiązania:

https://bibliotekanauki.pl/articles/1033066.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Hautes Fagnes
NWA 7915 chondrite
Siena chondrite
chondrites
elemental composition
grain density
mean atomic number
mean atomic weight

Opis:

Mean atomic weights Amean of Siena (LL5, fall 1794), Hautes Fagnes (LL5, S1, W1, find 1965) and NWA 7915 (LL5, S2, W3, find 2010) ordinary chondrites have been determined using literature data on chemical composition of the meteorites and using relationship between mean atomic weight and Fe/Si atomic ratio (Szurgot 2015). It was shown that NWA 7915 Amean = 22.80 is close to mean atomic weight of LL chondrites (Amean = 23.00), and is close to mean atomic weight of LL chondrite falls (Amean = 22.90, Szurgot 2015). NWA 7915’s Fe/Si atomic ratio (0.529) leads to Amean = 23.28 which is close to the value determined by bulk composition. This means that NWA 7915 belongs to LL5 chondrites, as previously classified (Brawata et al. 2014). Mean atomic weight Amean of Hautes Fagnes determined by bulk composition is between 23.11 and 23.35. Lower Amean value is close to Amean of LL chondrites, but higher value is the same as Amean of intermediate L/LL chondrites (23.34 for L/LL, Szurgot 2016). Hautes Fagnes Fe/Si atomic ratio and Amean(Fe/Si) are identical with those for NWA 7915 (Fe/Si = 0.529, Amean = 23.28). Amean data indicate that Hautes Fagnes can belong to LL5 chondrites, as previously classified (Vandeginste et al. 2012) or can be one of L/LL chondrites. Mean atomic weight of Siena meteorite is much higher than expected for LL chondrite. Siena’s bulk composition gives Amean = 24.47, and Amean(Fe/Si) dependence gives Amean = 24.45 (Fe/Si = 0.7345). Using dependence between mean atomic weight and grain density (Szurgot 2015) leads to Amean = 23.24 (dgr = 3.46 g/cm3, Macke 2010), and using dependence between Amean and magnetic susceptibility (Szurgot 2016) gives Amean = 23.53±0.13 (logc = 4.65±0.09, Macke 2010). Bulk composition and Fe/Si ratio indicate that Siena has the same Amean as intermediate H/L chondrites, for which Amean = 24.3 (Szurgot 2016). Grain density indicates rather L/LL intermediate group for Siena, and magnetic susceptibility indicates intermediate L/LL or L chondrites (23.34 for L/LL, and 23.67 for L, Szurgot 2016). Mean atomic number Zmean, and Amean/Zmean ratio of the three meteorites have been also determined. Siena’s Zmean = 12.104, Hautes Fagnes Zmean = 11.445–11.562, and NWA 7915’s Zmean = 11.293. Amean/Zmean ratios are: 2.022 for Siena, 2.019–2.020 for Hautes Fagnes, and 2.019 for NWA 7915.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2016, 7; 133-143
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Ameboidalne oliwinowe agregaty w chondrytach zwyczajnych
Amoeboid Olivine Aggregates in ordinary chondrites

Autorzy:

Owocki, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/1032782.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

meteorites
ordinary chondrite; Amoeboid Olivine Aggregate; thermal metamorphism

Opis:

An amoeboid olivine aggregates (AOA) are the refractory end-member of a family of fine-grained inclusions. They consist of masses of fine-grained (generally forsteritic) olivine crystals with other phases dispersed in between. The AOA are important components of carbonaceous chondrite and have been reported only from the unequilibrated Semarkona LL3.0 ordinary chondrite and examined by author equilibrated Sahara 02500 ordinary chondrite. The AOA’s are thought to represent solar-nebula condensates that experienced high-temperature annealing, but largely escaped melting. An amoeboid olivine aggregate found in the equilibrated ordinary Sahara 02500 chondrite has experienced weak planetary metamorphism resulting in equilibration and recrystallization of fine-grained olivine and albitic feldspar. The aggregate contains several fine-grained inclusions consisting of recrystallised fayalitic olivine, feldspar and minor amounts of metal, diopside, chromite, and apatite.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2011, 2; 112-116
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 25.

Tytuł:

Spadki meteorytów w 2017 roku. Okoliczności i obserwacje
Meteorite falls in 2017. Circumstances and observations

Autorzy:

Żmija, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/1033123.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

bolide
chondrite
eucrite
fireball
meteor
meteorite
meteorite fall
summary

Opis:

This scientific paper is a summary of the meteorite falls in 2017: Broek in Waterland (Holland), Tres Irmaos (Brazil), Serra Pelada (Brazil) and Kheneg Ljouâd (Morocco). The study also includes a section about unconfirmed falls, such as Puya Medio (Colombia), Mukundpura (India), Crawford Bay (Canada) and Sadiya (India). The vast majority of these specimens is ordinary chondrites of the L and LL groups. Only Serra Pelada meteorite turned out to be eucrite and Mukundpura is suspected to be carbonaceous chondrite. The author collects and organizes basic information about these findings and compares the latest data with statistics from previous years. The description of the circumstances of finding meteorites are brief and maintained in the popular-scientific tone. The text also includes a set of fireballs and bolides that could end with a meteorite fall. Among them is also a bolide that was visible from Poland. The thesis resembles the criteria for dividing meteors and notes the differences in their naming. It is extended by analogies and comparisons that make possible to look at the issues from different perspectives: from the statistical, through the media, to the historical one.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2018, 9; 187-205
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Spadki meteorytów w 2018 roku. Okoliczności i obserwacje
Meteorite falls in 2018. Circumstances and observations

Autorzy:

Żmija, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/1033142.pdf

Data publikacji:

2019

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

achondrite
bolide
chondrite
fireball
meteorite
meteorite fall
summary
superbolide

Opis:

This scientific paper aims to systematize knowledge about the circumstances of meteorite falls in 2018. Eight of them were officially confirmed by The Meteoritical Society: Hamburg (USA), Ablaketka (Kazakhstan), Aba Pan (Nigeria), Mangui (China), Ozerki (Russia), Renchen (Germany), Gueltat Zemmour (Morocco), Komaki (Japan). Seven more have not yet been classified: Central Kalahari (Botswana), Glendale (USA), Benenitra (Madagascar), Bhakkar (Pakistan), Ghadamis (Libya), Elkouran (Morocco) and meteorite fall from the Sahara Desert. It turns out that the most numerous group of meteorite falls in 2018 were L6 chondrites. There were no iron or stony-iron falls. The author collected information from many different sources. He analyzed entries in the MetBull catalog, publications in social media and press reports in order to compare them with official data from previous years. In this way, he tries to prove that although the circumstances of each meteorite fall are different, coherent conclusions can be drawn from them, and these can help meteorite researchers, for example, in verifying eyewitness accounts.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2019, 10; 199-221
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Shock veins in the Sahara 02500 ordinary chondrite

Autorzy:

Owocki, Krzysztof
Muszyński, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/94249.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

ordinary chondrite
shock veins
subsolidus recrystallization
zwyczajny chondryt
rekrystalizacja

Opis:

A specimen of the Sahara 02500 ordinary chondrite contains shock-produced veins consisting of recrystallised fine-grained pyroxenes that include small droplets of Ni-rich metal. Non-melted olivines and pyroxenes show planar deformations filled by shock-melted and -polluted metal and troilite. Shock-melted feldspathic glass is present close to the shock veins. Geothermometric estimations indicate that the meteorite locally experienced moderate shock metamorphism with a minimum local peak temperature above 1400ºC, resulting in partial melting of Ca-poor pyroxene and full melting of feldspars, metal and sulphides. The mineral assemblage in the shock veins suggests a pressure during melt recrystallisation below 10 GPa.

Źródło:

Geologos; 2012, 18, 2; 111-118
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Spadki meteorytów w 2019 roku. Okoliczności i obserwacje
Meteorite falls in 2019. Circumstances and observations

Autorzy:

Żmija, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/1033169.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

bolide
carbonaceous
chondrite
fireball
meteor
meteorite
meteorite fall
summary

Opis:

In 2019 two meteorite showers occurred on Earth, which ended with the fall of hundreds of fragments in Cuba and Costa Rica. Apart from them, meteorites with a total weight of probably less than 10 kg landed in Algeria, Morocco, Iran, India, and Germany. This work is another summary of the year in terms of meteorite falls. It includes information on the circumstances of these phenomena and their scientific consequences. The author collected information from many sources, especially the media and meteorite hunters, to describe in a brief form how the meteorites fell last year. The purpose of his work is to gather basic and proven knowledge, which can serve as an inspiration to further explore the history of meteorites, own meteorite hunting, and draw the attention of researchers to interesting falls in distant regions of the world.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2020, 11; 141-157
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 29.

Tytuł:

Potential importance of metallic resources of ordinary chondrite parent bodies

Autorzy:

Łuszczek, K.

Powiązania:

https://bibliotekanauki.pl/articles/89183.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

extraterrestrial resources
metallic resources
asteroid mining
ordinary chondrite parent bodies

Opis:

Demand for metallic resources constantly increases along with technological development. One of the factors that currently raises requests for resources is extensive space exploration. Especially, the exploration that involves space colonization creates the needs for resources not only on the Earth but also on other bodies in the Solar System. For instance, resources will be required for building bases and settlements or spare parts to machines, devices and space shuttles. The high transportation costs make launching them from our planet ineffective. New and attractive places for prospecting the resources in our Solar System are bodies located in the asteroid belt, namely parent bodies of ordinary chondrites. The goal of this paper is a review of scientific and economic aspects of extraterrestrial resources associated with such bodies. Studies of meteorites combined with scientific achievements of current space mission significantly improved our understanding of the origin, structure as well as chemical and mineral composition of these bodies and processes that affected them. This knowledge is used in XXI century to set up companies aiming at asteroid mining, or production of fuel and spare pieces in space. Additionally, owing to the fact that some asteroids are on collisional course with our planet, possibilities arise for resource utilization by deflection of hazardous asteroids and setting them on circumterrestrial or circummoon orbits.

Źródło:

Mining Science; 2018, 25; 57-69
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Nowe znalezisko meteorytu w południowej części województwa łódzkiego
New meteorite from the southern part of the Łódź Voivodeship, Poland

Autorzy:

Karwowski, Łukasz
Szopa, Krzysztof
Woźniak, Marek

Powiązania:

https://bibliotekanauki.pl/articles/1830272.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Kuźnica
meteorites
new meteorite from Poland
ordinary chondrite H5

Opis:

An anonymous person from Częstochowa in Poland found a new meteorite during the summer of 2008. The specimen was found in eolian sand, where exotic grains connected with glacial activity were not observed. The suspected meteorite was kept in the founder’s possession until the autumn of 2018. This was when the holder of the meteorite contacted the owners of the woreczko.pl webpage, which is dedicated to meteorite identification. Moreover, the webpage was developed and operated by meteorite collectors Jan Woreczko and Wadi. After meeting, Jan and Wadi bought the meteorite, which is now part of their collection. After the meeting, Jan and Wadi bought the meteorite (total meteorite mass 2143 g), which is now part of their collection. Three fragments with their total mass 20.74 g as well as two thin-sections (7.03 g) are deposited at the Earth Sciences Museum, University of Silesia in Katowice. The fusion crust is black to brownish, typical for a chondrite. Regmagliptes are visible. The meteorite is characterized by chondrules, which range in diameter from 0.015 to 1.000 mm in diameter. The most common type of chondrule is represented by olivine (Ol). The barred Ol texture, showing elongate, sub-parallel bars of olivine with clear pyroxenes (Px) and oligoclase between the bars. The second characteristic type is represented by Ol-Px porphyritic chondrules and radial Px chondrules. The matrix is not recrystallized; and the clasts are up to 0.1 to 0.2 mm in diameter. Px and Ol, plagioclase, metallic phases, troilite, and spinel (Cr-spinel) are up to 71.9 vol.%, 11.2 vol.%., 7.0 vol.%., 4.2 vol.%., and 1.1 vol.% of the meteorite, respectively. The average content of the secondary minerals is 4.4 vol.% (close to the outermost part is up to 8–10 vol.%. The meteorite is classified as a H5 ordinary chondrite, based on the Ol and Px composition (Fa/Fs), with an official name ‘Kuźnica’.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2021, 12; 41-57
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Shock heterogeneity and shock history of the recently found ordinary Csátalja chondrite in Hungary

Autorzy:

Kereszturi, A.
Fintor, K
Gyollai, I.
Kereszty, Z.
Szabo, M.
Szalai, Z.
Walter, H.

Powiązania:

https://bibliotekanauki.pl/articles/2059757.pdf

Data publikacji:

2018

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

meteorite
shock impact alteration
ordinary chondrite
infrared spectroscopy
Raman spectroscopy

Opis:

Shock impact-produced mineral alterations in two thin sections of the recently found Csátalja H4 ordinary chondrite meteorite are compared. Peak positions of Raman and infrared spectra of mineral clasts show peaks shifted in wavenumber relative to unshocked reference minerals, and both peak shifts and FWHM values seem to correlate to each other. In the less shocked thin section (Csátalja-1) a more monomineralic and homogeneous composition indicate shock pressures of <15 GPa, while the more shocked Csátalja-2 indicates shock pressure in the 15–17 GPa range. The highest identified infrared peak position shifts range between –48 and +28 cm–1 with peak broadening between 60–84 cm–1 in the case of the feldspars, which, together with sulphide globules, were produced by the shock itself. Feldspar spectra could be detected only by FTIR spectroscopy, but in most cases (above the S3 shock level) the mixed type of the pyroxene-feldspar spectra (both peaks in the same spectra) is in agreement with the shock-produced secondary feldspars. These grains are located around crystalline borders, and probably formed by selective melting, due to shock annealing. In reconstruction of the shock history, an early fragmentation by a lower shock effect and a later increased shock level-related vein and melt pocket formation occurred, with subsequent shock annealing; temporal reconstruction of the shock event is possible only in part. The joint usage of Raman and infrared spectroscopy provided useful insights into the shock-produced changes and their spatial inhomogeneity, while shocked feldspar could be better detected by infrared than by the Raman method.

Źródło:

Geological Quarterly; 2018, 62, 2; 433--446
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Identyfikacja minerałów meteorytu NWA 4047 za pomocą spektroskopii Ramana
Identification of minerals of NWA 4047 meteorite by Raman spectroscopy

Autorzy:

Szurgot, Marian
Kisiel, Krzysztof
Kisiel, Renata

Powiązania:

https://bibliotekanauki.pl/articles/1032694.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

confocal Raman micro-spectroscopy
olivine
ordinary chondrite NWA 4047
plagioclases
pyroxene

Opis:

Ordinary chondrite NWA 4047 was investigated by confocal Raman microspectroscopy to identify the extraterrestrial minerals. Olivines, orthopyroxenes, clinopyroxenes, plagioclase, graphite and diamond have been identified and characterized.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2009, 1; 147-150
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Meteoryt Tagish Lake – związki organiczne
Tagish Lake Meteorite – Organic Compounds

Autorzy:

Hurnik, Bogusława

Powiązania:

https://bibliotekanauki.pl/articles/1032706.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Tagish Lake
carbonaceous chondrite C2
meteorites
organic matter in meteorites

Opis:

The Tagish Lake meteorite fell in Canada (in British Columbia) in January 2000. It was classified as a peculiar carbonaceons chondrite – C2 not belonging to any of known chemistry groups. The report discusses the investigation of the Tagish Lake meteorite organic matter. The investigation confirmed that Tagish Lake meteorite contains a completely new previously unknown meteoritic matter.
Meteoryt Tagish Lake spadł w 2000 r. w Kanadzie (Kolumbia Brytyjska). Tagish Lake został sklasyfikowany jako nietypowy chondryt węglisty – C2, niemieszczący się w żadnej ze znanych grup chemicznych. W referacie omówiono badania związków organicznych tego meteorytu. Wyniki tych badań potwierdziły, że meteoryt Tagish Lake jest zupełnie nowym, nieznanym dotąd rodzajem materii meteorytowej.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2011, 2; 34-39
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Mineralogy and geochemistry of rare earth elements in the Moyil Valley alteration zones, Meshkinshahr (northwest Iran)

Autorzy:

Naseri, Hossain
Jamadi, Mahnaz
Radmard, Kaikhosrov
Alavi, Ghafour

Powiązania:

https://bibliotekanauki.pl/articles/1841625.pdf

Data publikacji:

2020

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

Sabalan Mountain
Cenozoic
chondrite-normalised
HREE
trachyandesite
Sabalan
Kenozoik
chondryt
trachyandezyt

Opis:

Sabalan Mountain (northwest Iran) witnessed intense volcanic activity during the Cenozoic (Plio-Pleistocene). The result of this manifests itself in the conical geometry of the Sabalan stratovolcano and ahigh hydrothermal gradient around it, which can be detected by geological phenomena such as hot springs, smoke gases and steam outlet pores. The high hydrothermal slope and upward migration of hot water in this area have caused extensive alteration zones in the host rocks. A mineralogical study of alteration zones in thewells drilled in the Moyil Valley to the northwest of Sabalan Mountain has revealed the presence of phyllic, argillic, calcitic and propylitic alterations in volcanic rocks (trachyandesite) and alteration phyllic and propylitic ones in monzonite rocks. In chondrite-normalised rare-earth-element diagrams, trachyandesite rocks exhibit an HREEs enrichment when compared to MREEs and LREEs in propylitic and calcitic alteration zones. This result can be explained by the acidic nature of hydrothermal fluids containing complex ions such as (SO-2, Cl-). The (La/Yb)cn, (La/Sm)cn and (Tb/Yb)cn ratios for argillic, phyllic, propylitic and calcitic alteration zones have revealed that they are higher in fresh rocks compared to altered rocks, suggesting the enrichment of HREEs in comparison to LREEs and MREEs. The anomalies of Eu do not change remarkably in the argillic and propylitic alteration zones of trachyandesite rocks; apparently, alteration hadno effect on them. Such behaviour reflects the presence of gold cations in Eu+3 formed at temperatures below 250°C. Eu anomalies increased in propylitic alteration zones in monzonite rocks and calciticand phyllic alteration zones in trachyandesiterocks.

Źródło:

Geologos; 2020, 26, 3; 219-231
1426-8981
2080-6574

Pojawia się w:

Geologos

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

The meteorite fall near Boumdeid, Mauritania, from September 14, 2011

Autorzy:

Buhl, S.
Toueirjenne, C.
Hofmann, B.
Laubenstein, M.
Wimmer, K.

Powiązania:

https://bibliotekanauki.pl/articles/411504.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Boumdeid (2011)
meteorite fall
Mauritania
trajectory scenario
L6 chondrite
cosmogenic radionuclides

Opis:

On the evening of September 14, 2011 at 21:00 GMT a bright bolide was observed by hundreds of eyewitnesses in the area north and west of the town of Kiffa, in the department of Assaba, in south Mauritania. A terminal fragmentation and sound phenomena were observed near the end point of the trajectory. At least one mass of 3.5 kg was observed to impact and recovered the morning after the fall near Boumdeid (or Bou Mdeid), around 60 km north of Kiffa. Subsequently a large number of eyewitness accounts were recorded and mapped by GPS. The present paper provides a scenario for the trajectory of the Boumdeid (2011) meteorite based on the available parameters and wind data at the relevant altitudes. In addition the paper presents the results of the mineralogical and chemical analysis of the recovered meteorite which is consistent with a classification as ordinary chondrite of type L6, shock stage S2, and a weathering grade of W0. Following its analysis and classification, the meteorite was published under the official name Boumdeid (2011) in Meteoritical Bulletin, no. 100, MAPS 49(8), (2014). Gamma ray spectroscopy was conducted 84 days after the fall and the detection of short-lived radionuclides such as ⁵⁶Co and ⁴⁶Sc confirmed the recency of the event. Derived from the data of ⁶⁰Co, ⁵⁴Mn and ²²Na the approximate preatmospheric radius of the meteorite body was 10–20cm. The report is also intended to serve as a case example for post-event data recovery and trajectory reconstruction in areas not covered by sky-camera networks and with limited scientific infrastructure.

Źródło:

Meteorites; 2014, 3, No. 1-2; 5-18
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Sprawozdanie z poszukiwań meteorytów w Oslo
Search report of meteorites in Oslo

Autorzy:

Tymiński, Zbigniew
Stolarz, Marcin
Kubalczak, Tomasz
Burski, Maciej
Zaręba, Paweł
Holst, Martin
Bilet, Morten

Powiązania:

https://bibliotekanauki.pl/articles/1032969.pdf

Data publikacji:

2013

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Oslo meteorite
chondrite
hammer
hunting for meteorites
meteorite fall
meteorite strewnfield
meteorites

Opis:

A piece of a meteorite that had crashed through the roof of a cottage house was find in the central Oslo quarter Rodelřkka at the beginning of March 2012. Some days later the second discovery in the melting snow of Ekebergsletta hilltop plateau triggered the hunting for meteorites in almost all sides of Oslo. The pieces of third meteorite broken by cars and spread out by snowplow was discovered on the asphalt road side by Maciek Burski, the member of Polish Meteoritical Society. Later on the missing fragments of the Maciek’s most east find was collected by Meteoritical Section members of Comet and Meteor Workshop (PKiM) with the help of local meteoritical authorities. The total mass of this unobserved fall is 6.22 kg in five pieces spread out in the eight km-long strewnfield with 200 g and 4.65 kg meteorites on the opposite ends. The Meteorite is not classified yet but unofficial information is “breccia H3-4”.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2013, 4; 108-114
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Lessons learned from the examinations of Allende meteorite
Wnioski wyciągnięte z badań nad meteorytem Allende

Autorzy:

Jujeczko, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/2034029.pdf

Data publikacji:

2022-03

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Allende
carbonaceous chondrite
calcium-aluminium-rich inclusions
chondrules
hemoglycin
hemolithin
radioisotope dating

Opis:

Allende is a CV3 carbonaceous chondrite that fell in Mexico on February 8th, 1969. Its Calcium-Aluminium-rich Inclusions (CAIs) revealed to be 4567.72±0.93 Myr old and helped to approximate the age of the solar system. CAIs’ isotopic composition indicate high level of 26Al at the moment of their birth. This led to the hypothesis of a supernova being the triggering event for the formation of the solar system from the protosolar nebula. Specific Fractionation and Unidentified Nuclear isotope CAIs (FUN CAIs) raise questions regarding other families of objects that were born in the protosolar viccinity. Questions regarding the conditions of the early protoplanetary disk come from the examination of chondrules which were born later than CAIs. Furthermore, the newest researches tie CV3 meteorites to the beginnings of the formation of life – it is possible that the earliest polymerized amino acids and proteins have been born there.
Rok 1969 był wielkim rokiem dla nauk o kosmosie. 20 lipca 1969 dwóch członków załogi misji Apollo 11 wylądowało na powierzchni Księżyca, gdzie Neil Armstrong wypowiedział swoje słynne słowa o małym kroku dla człowieka i wielkim dla ludzkości. Pół roku wcześniej miał miejsce spadek meteorytu Allende – jednego z najlepiej zbadanych przez naukę meteorytów. Nadlatujący obiekt musiał być bardzo duży, bo jedynie w ciągu pierwszych pięciu miesięcy zebrano około 2 tony materiału wielkości od 1 g do 110 kg. Pole spadkowe miało długość 50 km, prawdopodobnie przekraczało 300 km2 powierzchni i było jednym z największych w historii pomiarów. Meteoryt Allende to chondryt węglisty typu CV3 (ang. CV3 carbonaceous chondrite). Chondryty stanowią najczęstszy rodzaj spadków. Typ CV wskazuje jednak na podgrupę chondrytów węglistych w typie meteorytu Vigarano, co stanowi już jedynie 4% ogółu spadków. Chondryty węgliste typu CV3 stanowią rodzinę najstarszych znanych nam obiektów w Układzie Słonecznym (US). Najstarsze fragmenty Allende mają 4,56772±0,0093 miliardów lat i wyznaczają wiek samego US. Z tego względu meteoryty typu CV3 są bardzo cenne, bo mogą odpowiedzieć nam na pytania dotyczące tego, jak z gazu i pyłu dysku protoplanetarnego, narodziło się Słońce, planety i inne obiekty. Chondryty nie są w swym wyglądzie jednolite. Składają się ze zbitych ziaren materii preplanetarnej i pyłu, tworzących brekcję. Poszczególne elementy tej struktury zachowują indywidualne właściwości. Kluczowe z punktu widzenia kosmogonii są chondrule oraz tzw. inkluzje wapniowo-glinowe (CAI, calcium-aluminium-rich inclusions), uważane za najstarsze obiekty w US. CAI są zwykle bardzo małe i w przypadku większości chondrytów węglistych nie przekraczają 1 mm szerokości, jednak w meteorytach typu CV3 mogą osiągać 2–3 cm. Da się je wyróżnić na tle innych składowych brekcji za sprawą ich jaśniejszej barwy: białej, różowej, a czasem niebieskawej. Główne hipotezy związane z CAI twierdzą, że: powstały one w jakimś ograniczonym rejonie dysku protoplaneternego, bardzo blisko proto-Słońca; uformowały się w bardzo krótkim czasie (prawdopodobnie w mniej niż 100 tysięcy lat); zachowały w sobie skład izotopowy dysku protoplaneternego z tego okresu. Skład izotopowy CAI wskazuje na to, że zdarzeniem, które uruchomiło tworzenie się US była supernowa. Chondrule i CAI typu FUN to kolejne elementy brekcji Allende. Chondrule są obiektami młodszymi, mogącymi odpowiadać na pytania o kolejne procesy zachodzące w dysku protoplanetarnym. Natomiast FUN CAI, które odznaczają się trudnym do wytłumaczenia składem izotopowym, mogły powstać bądź to przed innymi CAI, bądź być osobną rodziną obiektów zrodzonych w okolicach proto-Słońca. Ponadto, meteoryty typu CV3 mogą także dawać odpowiedzi na pytania związane z początkami życia na Ziemi. Porównując tego typu meteoryty, w tym Allende, odkryto (w obiekcie Acfer 086) obecność pozaziemskich białek, a wcześniej spolimeryzowanych aminokwasów (Allende i Murchinson).

Źródło:

Acta Societatis Metheoriticae Polonorum; 2022, 13; 37-46
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 38.

Tytuł:

Chondryt węglisty NWA 4446
Carbonaceous chondrite NWA 4446

Autorzy:

Przylibski, Tadeusz A.
Blutstein, Konrad
Łuszczek, Katarzyna
Gruchot, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/2087069.pdf

Data publikacji:

2022

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

meteoryt
chondryt węglowy
chondryt CV3
Asteroida typu C
pas asteroid
Układ Słoneczny
ruda
meteorite
carbonaceous chondrite
CV3 chondrite
C-type asteroid
asteroid belt
Solar System
ore mineral

Opis:

The authors carried out petrographic, mineralogical, and chemical analyses (bulk chemical composition and microanalyses of mineral chemical composition) of NWA 4446 carbonaceous chondrite. NWA 4446 chondrite is classified as CV3, S2, W2. This meteorite is a rock fragment most likely from one of the C-type asteroids orbiting the Sun in the outer part of the asteroid belt. It represents the matter formed at the earliest stages of the formation of extrasola bodies in the solar system. As a result of the research, the authors documented a wider range of variation in the chemical composition of olivine crystals (Fa: 0.67-46.57 mol%) in the matrix and chondrules, and a much narrower range of variation in the chemical com- position of pyroxene crystals (Fs: 0.90–3.35 mol%) against the data used for the classification of the meteorite. The characteristics of the chondrules, ranging in size from 0.5 to more than 1 mm, allowed concluding that they constitute about 60% of the meteorite’s vol- ume, in which they form many structural and mineral varieties PO, POP, BO, PP and RP chondrules were observed. The remaining 40% of the chondrite volume is a matrix consisting of small crystals of pyroxenes, olivines, glass, as well as opaque minerals: sulphides, FeNi alloy, native copper and gold grains, carbonaceous substance, and compact CAIs. The mineral and chemical composi- tion of CAIs shows that their dominant mineral is melilite, accompanied by diopside and spinel. The chemical composition of spinel and diopside is very similar to their total chemical formulas, while the composition of melilite shows a significant sodium deficiency. Among the opaque minerals, one phase of the FeNi dominates - awaruite (Ni 3 Fe), and sulphides are represented by troilite (FeS) and mackinawite ((Fe,Ni) 9 S 8 ). Moreover, grains of native copper with an admixture of gold and grains of native gold with an admixture of platinum, nickel and copper with a size of several μm were identified. Taking into account the admixtures contained in the above-mentioned opaque minerals (mainly Co and Cu), the parent rock of the carbonaceous chondrite NWA 4446 can be considered to have been mineralized with Fe, Ni, Co and Cu ore minerals with the content of Au and Pt. This means that, we can expect deposits of native forms of the above-mentioned metals and sulphides on the parent bodies of carbonaceous chondrites of the CV group - C-type asteroids.

Źródło:

Przegląd Geologiczny; 2022, 70, 7; 513--526
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Zawartość minerałów FeNi w chondrytach H jako wskaźnik zasobności pozaziemskich skał rudonośnych w wybrane metale
Concentration of FeNi minerals in H chondrites as an indicator of extraterrestrial ore-bearing rocks wealth in selected metals

Autorzy:

Blutstein, K.
Przylibski, T. A.
Łuszczek, K.

Powiązania:

https://bibliotekanauki.pl/articles/2075845.pdf

Data publikacji:

2018

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

meteoryty
zwykłe chondryty
stop FeNi
pozaziemskie zasoby metali
chondryt H
asteroida 6 Hebe
meteorite
ordinary chondrite
H chondrite
FeNi alloy
extraterrestrial metal resources
H chondriteparent body
6 Hebe asteroid

Opis:

Extraterrestrial resources should be the basic sources of materials for the development of humankind civilization in space as well as they could replace the Earth’s resources when they would be exhausted. They can be obtained from the planets, their moons or asteroids, primarily NEOs but also from the asteroid belt. This article presents the results of petrographic research on the content of FeNi minerals whose may be a source of iron and nickel, in H type ordinary chondrites: Pułtusk, Cher- gach, Tamdakht, Gao-Guenie andNWA 4555, which parent body is probably the 6Hebe. The results confirm that the volumetric abundance of FeNi minerals in H type chondrites is ca. 8%. Moreover, this study shows the reliability of the reflected-light optical microscopy for determination of ore mineral concentrations in extraterrestrial rocks with weathering grade W0. Taking into account the homogenous spatial distribution of metallic grains (proved by author’s microscopic observations) and knowing the amount of FeNi minerals in rocks with Hchondrite composition, the amount of potential FeNi resources on Hparent bodies can be calculated. It was estimated that the iron resources from Hebe’s FeNi minerals would cover 1.3 million years of terrestrial mining production whereas nickel resources would last for approx. 100 milion years. A small NEO asteroid like (143624) 2003 HM16 (2 km in diameter) has resources comparable with 15 months of mining iron production and over 100 years of nickel production at present rate.

Źródło:

Przegląd Geologiczny; 2018, 66, 12; 776--784
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Procesy wietrzenia w meteorycie Pułtusk (wstępne wyniki badań)
Weathering processes of in Pułtusk meteorite (preliminary results)

Autorzy:

Gurdziel, Agnieszka
Karwowski, Łukasz

Powiązania:

https://bibliotekanauki.pl/articles/1032655.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Pułtusk meteorite
chondrite H5
meteorites
secondary minerals
weathered iron and sulphides
weathering

Opis:

The researchInvestigations of secondary changes in the tree samples of Pułtusk meteorite, have brought more questions than answers. All the samples have well kept preserved fusion crust, which is built of tree parts. The external part is massive and compact, practically without any fractures whereas the middle part is cracked and porous. The internal part goes into the “black veins zone”. In the middle zone of the crust, skeletal crystals of Fe-Ni spinel, - trevorite, were found. Minerals present within Pułtusk meteorite are differently variously weathered. In At the edges of meteorite the sulphide phases are slightly altered whereas the metallic phases are completely replaced by iron and iron-nickel oxides and hydroxides, which were party removed during cutting. Silicates and chromite are the best preserved minerals.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2009, 1; 23-27
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Leoncin – nowy polski chondryt LL4-6
Leoncin – the new LL4-6 ordinary chondrite from Poland

Autorzy:

Karwowski, Łukasz
Szopa, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/1033149.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

brecciated meteorite
monomictic breccia
new meteorite from Poland
ordinary chondrite LL4-6

Opis:

In this study, the new ordinary chondrite LL4-6 from the Leoncin Community, Poland is reported. This meteorite was sold on Allegro, a Polish online e-commerce platform, to a person, who is member of the Meteoritic Society of Poland. The meteorite was sold in 2017, but originally the fall was in 2012. Finder of the meteorite from the Nowe Gniewniewice Village (Leoncin Community) claimed that the meteorite was still warm (the higher temperature was result after hit in the roof) after fall and made a whole in metal roof (which was repaired soon after the fall). For five years after fall of the meteorite, it stayed in the finder hands. The total known weight of the meteorite is 111.3 g. The main mass is in the M. Burski’s collection (~70 g). Two plates with the total mass 20 g are stored at the Earth Science Museum, Faculty of Natural Sciences, University of Silesia in Katowice, Poland. The meteorite is strongly brecciated. All clasts are rounded, reaching up to 1 cm in size. The matrix is very fine grained. The biggest as well as clasts are represented by complex olivine-feldspar chondrule. Numerous clasts do not have any chondrules or their fragments as well. The fusion crust of the Leoncin meteorite is typical, having porous and glassy (isotropic) the most external part. The glassy zone is rich in Cr-rich spinels, where relicts of unmolten olivines and pyroxenes are present. The next zone is so-called the black vein zone. The veins are represented my metallic phases or Fe sulphide. The most common mineral in the fresh meteorite is olivine, having Fo and Fa up to 69 and 31, respectively. Pyroxenes are characterised by a general chemical formulae as follow: Fs9.78–9.7 Wo44.77–44.2 En46.02–45.53. Almost all feldspars are represented by plagioclases (Ab83.5–86.76Or2.54–5.53An9.42–12.5). Metallic phases are mostly represented by kamacite, taenite and rare tetrataenite (the richest in Ni phase; 55.92–49.21 wt.%). Troilite, spinel, ilmenite, apatite and merrillite are also noted. Based on chemical composition of investigated minerals, the Leoncin meteorite can by classified as a LL ordinary chondrite. It has been confirmed by fayalite content (avg. 30.33%) as well as the forsterite content in pyroxenes (avg. 25.32%). Brecciating of the meteorite, the same mineral content of the chondrules and their matrix shows that the meteorite is an example of monomictic breccia. Metamorphic changes of the clasts, their quality, size and mineral content, together with the chemical composition of selected minerals, indicate the LL4-6 type of the meteorites. The Leoncin meteorite seems to be a regolith, that formed far from the collision place on the asteroid. This situation is confirmed by the limitation of gassy material only to the fusion crust and lack of shock changes in the minerals. The parent body might be similar to the 25143 Itokawa asteroid or has connection with the Flora family.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2020, 11; 31-44
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Primitive enstatite achondrites

Autorzy:

Pilski, A. S.
Przylibski, T. A.
Łuszczek, K.

Powiązania:

https://bibliotekanauki.pl/articles/411494.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Acapulcoite
lodranite
winonaite
brachinite
ureilite
metachondrite
primitive achondrite
enstatite chondrite
primitive enstatite achondrite

Opis:

Conclusions drawn from the breadth of analytical data on primitive achondrites and enstatite chondrites paired with results of research performed by the authors have led the authors to propose the establishing of a new group of meteorites: primitive enstatite achondrites. The group is defined as the residual remaining after the partial melting of their protolith, which, in the case of primitive enstatite achondrites, is the parent body of enstatite chondrites. In this article are characterized textural features and characteristics of their mineral, chemical, and isotopic composition. The most important of these defining features are the presence of relic chondrules and/or triple junctions of crystal faces, as well as characteristic atomic and molar ratios of main elements: Si, Al, Fe, Mg, Mn and Ca, and particularly the molar ratios Fe/Mn and Fe/Mg. Another important characteristic is the isotopic composition of entrained noble gases, especially ratios of the heaviest of the isotopes and oxygen isotopes, whose values should be close to that typical for enstatite chondrites. It seems likely that the first meteorite to be classified as primitive enstatite achondrite will be the Zakłodzie enstatite achondrite.

Źródło:

Meteorites; 2011, 0, 0; 9-21
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Cosmogenic radionuclides in the Sołtmany (L6) meteorite

Autorzy:

Laubenstein, M.
Giampaoli, A.
Janowski, P.
Mietelski, J. W.

Powiązania:

https://bibliotekanauki.pl/articles/411508.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

meteorite
ordinary chondrite
short-lived radionuclides
cosmogenic radionuclides
gamma-ray spectrometry
52Mn

Opis:

Cosmogenic radionuclides were measured in two specimens of the Sołtmany chondrite (L6) that fell on April 30, 2011. The first fragment (154.9 g) was measured 12 days after the fall and the second piece (120 g), 53 days after the fall. Both fragments were measured by means of non-destructive gamma ray spectroscopy. The first specimen was examined with an ultra-low background high purity germanium (HPGe) detector in a deep underground laboratory. A standard low-background HPGe detector was used to examine the second fragment in a ground level laboratory. Twelve cosmogenic nuclides were detected in the activity range of 0.030 m・Bq g^–1 until 1.5 m・Bq g^–1 Their activities place constraints on the exposure history of the meteorite and reflect the effect of solar modulation of galactic cosmic rays during the solar maximum. On the activities of expected radionuclides ⁶⁰ Co (< 0.0075 m・Bq g^–1) and ⁴⁴ Ti (< 0.023 m・Bq g^–1) only upper limits could be given. Sołtmany is part of a group of only 14 meteorites where ⁵² Mn (5.591 d half life) could be determined.

Źródło:

Meteorites; 2012, 2, No. 1-2; 45-51
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Nie takie zaorane pole straszne, jak się wydaje. Poszukiwania meteorytów na Słowacji
A plowed field is not as scary as it seems. Meteorite hunting in Slovakia

Autorzy:

Morys, Jarosław
Żmija, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/2195011.pdf

Data publikacji:

2023

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Meteorite
Bolide
Meteorite Hunting
Meteorite Fall
Meteorite Find
Chondrite
Strewnfield
Puste Ulany
Slovakia

Opis:

The article describes the finding of the first meteorites after a fall that occurred on June 25, 2022 in the area of the village of Pusté Úľany in southwestern Slovakia. The discovery was made by two meteorite hunters from Poland – Mateusz Żmija and Jarosław Morys, who found specimens weighing 8.55 grams and 10.73 grams.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2023, 14; 134-140
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Opis okoliczności i miejsca spadku meteorytu we wsi Sołtmany pod Giżyckiem oraz wstępne wyniki badań
A report about circumstances of the meteorite fall near Sołtmany village (near Gizycko – Poland) and initial examination results

Autorzy:

Woźniak, Beata
Woźniak, Marek

Powiązania:

https://bibliotekanauki.pl/articles/1032946.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Sołtmany
magnetic suceptibility
meteorite
meteorites
meteoritica
mineralogy
ordinary chondrite
petrology
wiki.meteoritica.pl

Opis:

A description of an ordinary chondrite L6 type fall in Soltmany Village. A report from a fall spot and initial results of examination carried by polish scientists team. An examination of elementary and mineral abundance and magnetic features. History of meteorite fragments.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2012, 3; 140-152
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Średni ciężar cząsteczkowy chondrytu Jezersko (H4). Promień i objętość atomu i cząsteczki chondrytu
Average molecular weight of Jezersko H4 chondrite. Radius and volume of atom and molecule of chondrite

Autorzy:

Szurgot, Marian

Powiązania:

https://bibliotekanauki.pl/articles/1033154.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

Jezersko chondrite
average molecular weight
average radius of atom
average radius of molecule

Opis:

Average molecular weight and average atomic number of molecule of Jezersko ordinary chondrite (H4 S2(3) W2, find in 1992 in Slovenia) have been calculated using literature data on chemical composition of the meteorite (Miler et al. 2014). It was shown that Jezersko’s = 55.58, = 27.21, and ratio / = 2.043 for composition without water. Jezersko’s silicates shown the values: = 54.08, = 21.77, and / = 2.484. Volume and radius of average Jezersko molecule, and of atom have been also determined. It was calculated that the average volume of Jezersko’s molecule Vmol = 2.515·10–29 m3, and average radius of Jezersko’s molecule Rmol = 181.5 pm. Average volume of the Jezersko’s atom Vatom = 1.117·10–29 m3, and average radius of Jezersko’s atom: Ratom = 138.5 pm. Ratio of average Jezersko’s volume of molecule to atom volume: 2.25, and ratio of radius of molecule to radius of atom: 1.31. Number of atoms in Jezersko meteorite average molecule Nmol = /Amean = /Zmean = 2.25, and for Jezersko’s silicates Nsimol = 2.48.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2020, 11; 98-109
2080-5497

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Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Skład chondrytów węglistych jako wyznacznik zasobności planetoid typu C w surowce metaliczne
Composition of carbonaceous chondrites as an indicator of the abundance of C-type asteroids in metallic resources

Autorzy:

Blutstein, Konrad
Przylibski, Tadeusz A.
Łuszczek, Katarzyna
Gruchot, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/2034027.pdf

Data publikacji:

2022-03

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

carbonaceous chondrite
meteorite
C-type asteroid
asteroid belt
extraterrestrial mining
metal
extraterrestrial resources

Opis:

The chemical composition of carbonaceous chondrites was analysed in terms of the content of selected 24 metals, including noble metals and rare-earth metals. Based on the obtained results, the abundance of C-type asteroids in metallic raw materials was estimated and compared to the concentration of terrestrial deposits and the average content in the Earth’s crust. All the analysed elements, except rare earths, showed higher concentrations in carbonaceous chondrites than in the Earth’s crust, but most of them did not match the Earth’s deposit contents. The exception is Fe and Ni, the concentrations of which in carbonaceous chondrites significantly exceed the Earth’s deposit concentrations. The profitability of mining operations on C-type asteroids is also increased by the number of accompanying mineral commodities, mainly metals (Cr, Co, Cu, Au, Pt, Pd, Ag), and water ice. In addition, the parent bodies of carbonaceous chondrites occur relatively close to the moons of Jupiter and Saturn – potential space mission targets.

Źródło:

Acta Societatis Metheoriticae Polonorum; 2022, 13; 7-26
2080-5497

Pojawia się w:

Acta Societatis Metheoriticae Polonorum

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Thermophysical properties of the Sołtmany meteorite

Autorzy:

Szurgot, M.
Wach, R. A.
Przylibski, T.A.

Powiązania:

https://bibliotekanauki.pl/articles/411496.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Meteorytowe

Tematy:

chondrite
differential scanning calorimetry (DSC)
specific heat capacity
thermal capacity
thermal diffusivity
thermal conductivity

Opis:

Bulk density, porosity and thermophysical properties of the Sołtmany meteorite have been determined. The mean bulk density of the meteorite is 3.475‧10³kg/m³, mean bulk density of the crust is 4.3‧10³ kg/m³, grain density 3.71‧10³ kg/m³, and porosity 6.4 ±} 0.4%. Mean specific heat capacity determined by DSC in temperature range between 223 and 823 K increases from 595 to 1046 J/(kg‧K), and is equal to 728 J/(kg‧K) at room temperature. Specific heat capacity of various samples is in the range 705–769 J/(kg‧K) at room temperature. Thermal capacity of Sołtmany chondrite is equal to 2.53‧10⁶ J/(m³‧K), thermal diffusivity (1.5–1.8)‧10^-6 m²/s, and thermal conductivity 3.9–4.5 W‧m–^-1‧K^-1at room temperature. Differential scanning calorimetry revealed two reversible phase transitions in the Sołtmany’s troilite: α/β transition at 423 K, and β/γ transition at 596.6 K.

Źródło:

Meteorites; 2012, 2, No. 1-2; 53-65
2299-0313
2299-1220

Pojawia się w:

Meteorites

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Ciepło właściwe i ciepło atomowe chondrytu Jezersko
Specific heat and atomic heat of the Jezersko chondrite

Autorzy:

Szurgot, Marian A.

Powiązania:

https://bibliotekanauki.pl/articles/2076001.pdf

Data publikacji:

2020

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

chondryt Jezersko
zwykłe chondryty
ciepło właściwe
ciepło atomowe
Jezersko chondrite
ordinary chondrites
specific heat
atomic heat

Opis:

Specific heat capacity of the Jezersko chondrite (H4, S2/3, W2) was predicted by a relationship between bulk density and heat capacity of meteorites Cp(dbulk). It was calculated that Cp(dbulk) is equal to 703±15 J/(kgK) at 300 K, and 529±15 J/(kgK) at 200 K. Its volumetric heat capacity is equal to 1.8±0.1 MJ/(m3K) at 200 K, and 2.3±0.1 MJ/(m3K) at 300 K, which is close to the room temperature value characteristic of stony meteorites (2.5 MJ/(m3K). The atomic heat of the Jezersko meteorite is 13.1±0.4J/(molK) at 200K and 17.4±0.4 J/(molK) at 300K. It was shown that mean atomic weight enables predicting room temperature values of specific heat capacity of ordinary chondrites, and the common mean atomic heat of ordinary chondrites is equal to 17.5±0.6 J/(molK) at 300 K.

Źródło:

Przegląd Geologiczny; 2020, 68, 1; 54--59
0033-2151

Pojawia się w:

Przegląd Geologiczny

Dostawca treści:

Biblioteka Nauki

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Tytuł:

Thermal metamorphic evolution of the Pułtusk H chondrite breccia – compositional and textural properties not included in petrological classification

Autorzy:

Krzesinska, A. M.

Powiązania:

https://bibliotekanauki.pl/articles/2060180.pdf

Data publikacji:

2016

Wydawca:

Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy

Tematy:

meteorite
H chondrite
parent body metamorphism
petrologic classification
partial melting
spinel group minerals
rutile in chondrites

Opis:

The thermal history that chondrites experienced on their parent body is an aspect of their petrological classification. However, in the classification scheme, metamorphic conditions are generally limited to the peak metamorphic temperature attained, while it is known that reconstruction of the genuine thermal evolution of any rock requires identification of various metamorphic factors, definition of the temperature-time path during metamorphism and characterization of the processes responsible for heating. Study of the brecciated Pułtusk H chondrite shows that the meteorite comprises both low and high petrologic type material and should be classified as a H3.8–6 chondrite. Based on the textures and mineral and chemical composition, the thermal metamorphic history of the breccia is reconstructed and it is shown to be inconsistent with the petrologic classification; the textural maturation and degree of compositional equilibrium in the meteorite do not correspond to the temperatures attained. The metamorphic conditions are shown to be a function of the primary composition of the accreted minerals and of two metamorphic phases, progressive and retrogressive. First, a prograde phase led to textural maturation and equilibration of the chemical composition of silicates and oxides. The peak metamorphic temperatures were at least ~700ºC for the type 3.8. and 4 material, and up to ~1000ºC in H6 clasts i.e., sufficient to locally give rise to partial melting. The following retrograde metamorphism led to compositional re-equilibration of minerals and textural re-equilibration of minerals with partial melts. The cooling rate during retrograde metamorphism down to at least ~700ºC was low, which allowed potassium feldspar to form patches in Na-plagioclase and pseudobrookite-armalcolite breakdown to form an association of ilmenite and rutile. The two-phase metamorphic evolution of the Pułtusk breccia was the most likely the result of impact heating, which affected the parent body in its very early history.

Źródło:

Geological Quarterly; 2016, 60, 1; 211--224
1641-7291

Pojawia się w:

Geological Quarterly

Dostawca treści:

Biblioteka Nauki

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