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Tytuł:
Właściwości termofizyczne meteorytu Sołtmany
Autorzy:
Szurgot, Marian
Wach, Radosław A.
Przylibski, Tadeusz A.
Powiązania:
https://bibliotekanauki.pl/articles/1033016.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Sołtmany meteorite
meteorites
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 185-186
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Szybkość uwalniania się 222Rn z wód podziemnych do atmosfery
222Rn release rate from groundwater to the atmosphere
Autorzy:
Przylibski, Tadeusz A.
Maciejewski, Piotr
Zagożdżon, Katarzyna D.
Zagożdżon, Paweł P.
Powiązania:
https://bibliotekanauki.pl/articles/20197025.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Radon
222 Rn
wody gruntowe
woda radonowa
powierzchnia wody
stężenie aktywności 222 Rn
jednostka metamorficzna Śnieżnika
groundwater
radon water
surface water
222 Rn exhalation rate
Śnieżnik metamorphic unit
Opis:
The authors conducted studies on the release rate of 222Rn from groundwater flowing out of a spring, from metamorphic reservoir rocks. This source gives rise to a stream about 205 m long. The activity concentration of Rn in the spring was about 700 Bq/dm33, took place at a distance of about 1 70-180 metres from the spring. With regard to the waterflow path, flowtime and the volume of water flowing through the cross-section of the tested stream, the exhalation coefficient of 222Rn from water to atmospheric air is 3.80 Bq/dm3/m, 1.51 Bq/dm3/s and 1. 25 Bq/dm3/dm3, respctively. According to the authors, further research conducted in other springs occurring in other types of rocks and under different flow conditions (at different times of the year) will allow characterizing the dynamics of the process of 222Rn release from groundwater through surface waters into the atmosphere. Perhaps this process can be described with a universal mathematical function.
Źródło:
Przegląd Geologiczny; 2022, 70, 10; 742-750
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
Radon intercomparison tests : Katowice, 2016
Autorzy:
Chałupnik, Stanisław
Skubacz, Krystian
Wysocka, Małgorzata
Mazur, Jadwiga
Bonczyk, Michał
Kozak, Krzysztof
Grządziel, Dominika
Urban, Paweł
Tchorz-Trzeciakiewicz, D.
Kozłowska, Beata
Walencik-Łata, Agata
Podstawczyńska, Agnieszka
Olszewski, Jerzy
Bartak, Jakub
Karpińska, Maria
Wołoszczuk, Katarzyna
Dohojda, Marek
Nowak, Jakub
Długosz-Lisiecka, Magdalena
Foerster, Elisabeth
Przylibski, Tadeusz A.
Powiązania:
https://bibliotekanauki.pl/articles/146183.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
active monitors
passive monitors
Polish Radon Centre
proficiency test
radon
Opis:
At the beginning of the year 2016, the representatives of the Polish Radon Centre decided to organize proficiency tests (PTs) for measurements of radon gas and radon decay products in the air, involving radon monitors and laboratory passive techniques. The Silesian Centre for Environmental Radioactivity of the Central Mining Institute (GIG), Katowice, became responsible for the organization of the PT exercises. The main reason to choose that location was the radon chamber in GIG with a volume of 17 m3 , the biggest one in Poland. Accordingly, 13 participants from Poland plus one participant from Germany expressed their interest. The participants were invited to inform the organizers about what types of monitors and methods they would like to check during the tests. On this basis, the GIG team prepared the proposal for the schedule of exercises, such as the required level(s) of radon concentrations, the number and periods of tests, proposed potential alpha energy concentration (PAEC) levels and also the overall period of PT. The PT activity was performed between 6th and 17th June 2016. After assessment of the results, the agreement between radon monitors and other measurement methods was confirmed. In the case of PAEC monitors and methods of measurements, the results of PT exercises were consistent and confirmed the accuracy of the calibration procedures used by the participants. The results of the PAEC PTs will be published elsewhere; in this paper, only the results of radon intercomparison are described.
Źródło:
Nukleonika; 2020, 65, 2; 127-132
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Potencjalnie lecznicze wody radonowe wschodniej części Wysokiego Grzbietu Gór Izerskich (Sudety) o największej zawartości radonu w Polsce
Potentially medicinal radon waters of the eastern part of the High Ridge in the Izera Range (Sudetes), containing the greatest radon concentration in Poland
Autorzy:
Prusak, Jakub
Przylibski, Tadeusz A.
Powiązania:
https://bibliotekanauki.pl/articles/20222176.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
222 Rn
radon
wody gruntowe
woda radonowa
woda lecznicza
Sudety
Szklarska Poręba
groundwater
radon water
medicinal water
Sudetes
Opis:
In the years 2020-2022, the authors conducted research on the activity concentration of 222 Rn in the groundwater of the eastern part of the Izera metamorphic unit. As a result, they found potentially medicinal radon waters in hornfelses of the eastern part of the Szklarska Poręba band. The value measured in one of the water samples appeared to be the highest activity concentration of 222Rn in groundwater of Poland so far - 3368 ±61 Bq/dm3. The authors also found that outflows of potentially medicinal radon waters account for almost 85.5% (47 out of 55) of all groundwater outflows in the study area. Thanks to the large amount of data obtained, the authors calculated a new value of the hydrogeochemical back-ground of 222 Rn in the groundwater of the Izera metamorphic unit. The background is currently 17-890 Bq/dm3. In Poland, higher values have only been reported of the Lądek-Śnieżnik metamorphic unit. The research results also open the way to the possible creation of a modern radon spa in Szklarska Poręba. It could operate in Biała Dolina on the basis of both previously found resources of radon waters of the Karkonosze granite and the radon waters forming within the eastern part of the Izera metamorphic unit.
Źródło:
Przegląd Geologiczny; 2023, 71, 2; 58-70
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Pierwsza tona Księżyca na Ziemi
The first ton of the Moon on Earth
Autorzy:
Przylibski, Tadeusz
Bludstein, Konrad
Szczęśniewicz, Mateusz
Łuszczek, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2195015.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
The Moon
lunar meteorite
basalt
anorthosite
feldspathic breccia
Księżyc
meteoryt księżycowy
bazalt
anortozyt
brekcja skaleniowa
Opis:
The authors drew attention to the classification in December 2022 of over one ton of lunar meteorites that fell to Earth. They have been found since the early 1960s, but their first classification, as lunar meteorites, was made only in 1982. This was possible thanks to more advanced geochemical research and the possibility of comparing their results with the results of analyzes of samples of rocks and lunar regolith brought by the Soviet missions of the Luna program, and above all by several American missions of the Apollo program. With access to over 1.4 tons of lunar rocks on Earth, we are now able to conduct multidisciplinary studies of the lunar geology. Their results are particularly important in the context of building human settlements or lunar bases for further exploration of the solar system. This applies to both the physical properties of these rocks, as well as their chemical and mineral composition in the context of the presence of deposits of various mineral resources. It should be emphasized that meteoritic material from the Moon has been increasing in terrestrial collections (especially scientific ones) very quickly since 2015. This is the result of extensive exploration work, primarily in Antarctica, Africa, the Arabian Peninsula and Australia. Among the identified rocks reaching the Earth in the form of lunar meteorites, the most numerous are feldspar breccias (impact metamorphic rocks), anorthosites (plutonic igneous rocks building highlands areas of the silver globe) and basalts (extrusive igneous rocks building areas of the lunar maria). In addition, there are other igneous mafic rocks, such as gabbro, norite, troctolite and others. The surface of the crust is covered with regolith composed of fragments of the above-mentioned igneous rocks and breccias subjected to fragmentation by successive collisions with meteorites and micrometeorites and the action of solar wind particles (space weathering). As a result of these processes, the surface of the Moon is covered with a layer of loose sedimentary rock with a thickness of a few to several meters. Locally, a regolith may be a compact clastic sedimentary rock if a significant number of rock fragments are welded together with the glaze produced during collisions with micrometeorites. The authors also briefly presented the genesis and evolution as well as the geological structure of the Moon based on the results of the latest geophysical and geochemical (including isotopic) as well as mineralogical and petrological research. They pointed out that the proposed model of the genesis of the Moon from synestia formed after the collision of the proto-Earth with another hypothetical planetary embryo called Theia, explains well the chemical and isotopic homogeneity of the Earth and the Moon. The authors also pointed out that due to the common genesis, lunar meteorites are classified and named in the same way as terrestrial rocks, which definitely distinguishes them from other meteorites. The exceptions are Martian and HED meteorites, which are classified similarly to terrestrial rocks, although their names often do not have equivalents in the classification of terrestrial rocks (e.g. SNC meteorites). Tracking data on officially classified lunar meteorites, the authors found that in December 2022, the total mass of meteoritic matter considered to coming from the Moon exceeded 1 ton. Lunar meteorites are currently the largest source of information about the geology of the Silver Globe, accounting for almost two-thirds of the mass of lunar material available for study on Earth.
Autorzy zwrócili uwagę na sklasyfikowanie w grudniu 2022 roku już ponad tony meteorytów księżycowych, jakie spadły na Ziemię. Znajdowane były one od początku lat sześćdziesiątych XX wieku, jednak pierwsze ich klasyfikacje jako meteorytów księżycowych wykonane zostały dopiero w 1982 roku. Możliwe to było dzięki bardziej zaawansowanym badaniom geochemicznym i możliwości odniesienia ich wyników do wyników analiz prób skał i regolitu księżycowego przywiezionych przez misje radzieckie programu Łuna, a przede wszystkim przez kilka misji amerykańskich programu Apollo. Dzięki dostępowi na Ziemi do ponad 1,4 tony skał księżycowych możemy obecnie prowadzić multidyscyplinarne badania geologii Księżyca. Ich wyniki są szczególnie ważne w kontekście budowy osiedli ludzkich lub baz na Księżycu w celu dalszej eksploracji Układu Słonecznego. Dotyczy to zarówno właściwości fizycznych tych skał, a także ich składu chemicznego i mineralnego w kontekście występowania złóż różnorodnych surowców mineralnych. Należy podkreślić, że materiału meteorytowego z Księżyca przybywa w ziemskich kolekcjach (zwłaszcza naukowych) bardzo szybko dopiero od roku 2015. Jest to efektem szeroko zakrojonych prac poszukiwawczych przede wszystkim na obszarze Antarktydy, Afryki, Półwyspu Arabskiego i Australii. Wśród zidentyfikowanych skał docierających na Ziemię w postaci meteorytów księżycowych najliczniej reprezentowane są brekcje skaleniowe (impaktowe skały metamorficzne), anortozyty (skały magmowe głębinowe budujące wyżynne obszary Srebrnego Globu) oraz bazalty (skały magmowe wylewne budujące obszary mórz księżycowych). Poza tym spotykane są inne skały magmowe zasadowe, takie jak gabro, noryt, troktolit i inne. Powierzchnię skorupy pokrywa regolit złożony z fragmentów wymienionych skał magmowych i brekcji poddanych rozdrabnianiu kolejnymi zderzeniami z meteorytami i mikrometeorytami oraz działaniu cząstek wiatru słonecznego (wietrzenie kosmiczne). W wyniku tych procesów powierzchnia Księżyca pokryta jest warstwą luźnej skały osadowej okruchowej o miąższości od kilku do kilkunastu metrów. Lokalnie regolit może być skałą osadową okruchową zwięzłą, jeśli znaczna liczba okruchów skalnych ulegnie połączeniu (zespawaniu – ang. welding) szkliwem produkowanym w czasie zderzeń z mikrometeorytami. Autorzy przedstawili także krótko genezę i ewolucję oraz budowę geologiczną Księżyca w oparciu o wyniki najnowszych badań geofizycznych i geochemicznych (w tym izotopowych) oraz mineralogicznych i petrologicznych. Wskazali, że zaproponowany model genezy Księżyca z synestii utworzonej po zderzeniu proto-Ziemi z innym hipotetycznym embrionem planetarnym o nazwie Theia, dobrze tłumaczy jednorodność chemiczną i izotopową Ziemi i Księżyca. Autorzy zwrócili także uwagę, że dzięki wspólnej genezie meteoryty księżycowe klasyfikowane i nazywane są tak samo, jak skały ziemskie, co zdecydowanie odróżnia je od innych meteorytów. Wyjątek stanowią meteoryty marsjańskie oraz HED, które klasyfikowane są podobnie, jak skały ziemskie, aczkolwiek ich nazwy często nie mają odpowiedników w klasyfikacji skał ziemskich (np. meteoryty SNC). Śledząc dane na temat oficjalnie klasyfikowanych meteorytów księżycowych autorzy stwierdzili, że w grudniu 2022 roku łączna masa materii meteorytowej uznanej za pochodzącą z Księżyca przekroczyła 1 tonę. Meteoryty księżycowe są obecnie największym źródłem informacji o geologii Srebrnego Globu, stanowiąc niemal 2/3 masy materii księżycowej dostępnej do badań na Ziemi.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2023, 14; 163-182
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
National comparison of methods for determination of radon in water
Autorzy:
Mazur, Jadwiga
Kozak, Krzysztof
Grządziel, Dominik
Guguła, Szymon
Mroczek, Mariusz
Kozłowska, Beata
Walencik-Łata, Agata
Podgórska, Zuzanna
Wołoszczuk, Katarzyna
Przylibski, Tadeusz A.
Kowalska, Agata
Domin, Elżbieta
Wysocka, Małgorzata
Chałupnik, Stanisław
Chmielewska, Izabela
Długosz-Lisiecka, Magdalena
Szajerski, Piotr
Chau, Nguyen Dinh
Krakowska, Paulina
Pliszczyński, Tomasz
Ośko, Jakub
Dymecka, Małgorzata
Mazurek, Daria
Powiązania:
https://bibliotekanauki.pl/articles/148272.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
AlphaGUARD monitor
interlaboratory comparison
LSC method
radon in water
Z-score value
Opis:
The article describes three interlaboratory experiments concerning 222Rn determination in water samples. The first two experiments were carried out with the use of artificial radon waters prepared by the Laboratory of Radiometric Expertise (LER), Institute of Nuclear Physics, Polish Academy of Sciences in Kraków in 2014 and 2018. The third experiment was performed using natural environment waters collected in the vicinity of the former uranium mine in Kowary in 2016. Most of the institutions performing radon in water measurements in Poland were gathered in the Polish Radon Centre Network, and they participated in the experiments. The goal of these exercises was to evaluate different measurement techniques used routinely in Polish laboratories and the laboratories’ proficiency of radon in water measurements. In the experiment performed in 2018, the reference values of 222Rn concentration in water were calculated based on the method developed at LER. The participants’ results appeared to be worse for low radon concentration than for high radon concentrations. The conclusions drawn on that base indicated the weaknesses of the used methods and probably the sampling. The interlaboratory experiments, in term, can help to improve the participants’ skills and reliability of their results.
Źródło:
Nukleonika; 2020, 65, 2; 77-81
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteoroid i meteoryt. Powrót do podstaw i definicji
Meteoroid and meteorite. Back to basics and definitions
Autorzy:
Przylibski, Tadeusz
Powiązania:
https://bibliotekanauki.pl/articles/2195013.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
The Moon
lunar meteorite
basalt
anorthosite
feldspathic breccia
Opis:
The authors drew attention to the classification in December 2022 of over one ton of lunar meteorites that fell to Earth. They have been found since the early 1960s, but their first classification, as lunar meteorites, was made only in 1982. This was possible thanks to more advanced geochemical research and the possibility of comparing their results with the results of analyzes of samples of rocks and lunar regolith brought by the Soviet missions of the Luna program, and above all by several American missions of the Apollo program. With access to over 1.4 tons of lunar rocks on Earth, we are now able to conduct multidisciplinary studies of the lunar geology. Their results are particularly important in the context of building human settlements or lunar bases for further exploration of the solar system. This applies to both the physical properties of these rocks, as well as their chemical and mineral composition in the context of the presence of deposits of various mineral resources. It should be emphasized that meteoritic material from the Moon has been increasing in terrestrial collections (especially scientific ones) very quickly since 2015. This is the result of extensive exploration work, primarily in Antarctica, Africa, the Arabian Peninsula and Australia. Among the identified rocks reaching the Earth in the form of lunar meteorites, the most numerous are feldspar breccias (impact metamorphic rocks), anorthosites (plutonic igneous rocks building highlands areas of the silver globe) and basalts (extrusive igneous rocks building areas of the lunar maria). In addition, there are other igneous mafic rocks, such as gabbro, norite, troctolite and others. The surface of the crust is covered with regolith composed of fragments of the above-mentioned igneous rocks and breccias subjected to fragmentation by successive collisions with meteorites and micrometeorites and the action of solar wind particles (space weathering). As a result of these processes, the surface of the Moon is covered with a layer of loose sedimentary rock with a thickness of a few to several meters. Locally, a regolith may be a compact clastic sedimentary rock if a significant number of rock fragments are welded together with the glaze produced during collisions with micrometeorites. The authors also briefly presented the genesis and evolution as well as the geological structure of the Moon based on the results of the latest geophysical and geochemical (including isotopic) as well as mineralogical and petrological research. They pointed out that the proposed model of the genesis of the Moon from synestia formed after the collision of the proto-Earth with another hypothetical planetary embryo called Theia, explains well the chemical and isotopic homogeneity of the Earth and the Moon. The authors also pointed out that due to the common genesis, lunar meteorites are classified and named in the same way as terrestrial rocks, which definitely distinguishes them from other meteorites. The exceptions are Martian and HED meteorites, which are classified similarly to terrestrial rocks, although their names often do not have equivalents in the classification of terrestrial rocks (e.g. SNC meteorites). Tracking data on officially classified lunar meteorites, the authors found that in December 2022, the total mass of meteoritic matter considered to coming from the Moon exceeded 1 ton. Lunar meteorites are currently the largest source of information about the geology of the Silver Globe, accounting for almost two-thirds of the mass of lunar material available for study on Earth.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2023, 14; 157-162
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Wyświetlanie 1-15 z 19

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