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    Wyświetlanie 1-12 z 12
    Tytuł:
    Czy w Polsce są autochtoniczne tektyty?
    Are autochthonous tektites in Poland?
    Autorzy:
    Brachaniec, Tomasz
    Szopa, Krzysztof
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033045.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Polska
    autochthonous
    moldavite
    strewn field
    tektite
    Opis:
    Undoubtedly, the river transport is very important in tektites distribution. Most of the moldavites are located in fluvial sediments, what indicates their redeposition origin. Similar situation is on the territory of Poland. Finding of the autochthonous Polish tektites seems very difficult and requires further fieldworks.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2016, 7; 17-20
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Meteoryt Święcany
    Święcany meteorite
    Autorzy:
    Karwowski, Łukasz
    Badur, Łukasz
    Mazur, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/1032662.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    meteorites
    new polish chondrite L 4-5
    schock stage s2
    warthering stage w3
    Święcany meteorite
    Opis:
    The new Polish meteorite Święcany represents an old fall. It was found in 2004 in the Podkarpacie region, at Święcany village, commune Skołyszyn, district Jasło. The coordinates of this find are: φ = 49°47'29"N; λ = 21°15'28"E; or „1992”, x= 216194,11, y= 662339,76. It was found by 12 year old Katarzyna Depczyńska on the village gravel road. Probable primary mass is ca. 8 g. The present mass is 6.62 g., and one polished thin section. The classification: ordinary chondrite L4-5, weathering stage w3, shock stage s2.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2009, 1; 44-47
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wtórne zmiany w obrębie fosforków i węglików w meteorycie Morasko
    The Secondary Changes of Phosphides and Carbides in Morasko Meteorite
    Autorzy:
    Gurdziel, Agnieszka
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1032705.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Morasko meteorite
    meteorites
    secondary minerals
    weathered iron meteorite
    Opis:
    Weathering processes of minerals which are presented in the Morasko meteorite are characterized by different speed of the secondary changes. The most resistant minerals for the alternations are phosphites (schreibersite, rhabdite, nickielphosphide) and carbides (cohenite) but also the mentioned phases show secondary fluctuation. Phosphites are changing into metallic, phosphorus free phases, which are similar to native nickel or avaurite (awaruitu) with very well visible modification of its crystal morphology. All phosphorus amount is introduced to secondary phosphates like vivianite. The carbides alternation processes occur in a different way than in case of phosphates. Carbon is free to the environment up to time, when the new phase is totally decomposed and replaced by hydroxyoxide of iron. Sometimes, the high-nickel metallic phases are also noted as the products of the weathering. All described mineral phases, that are resistant for secondary alternation might be indicators for high evolved meteoritic material in the Earth’s weathered rocks.
    Wietrzenie poszczególnych faz mineralnych, obecnych we fragmentach meteorytu Morasko, przebiega w różnym tempie. Za najbardziej odporne uznaje się fosforki (schreibersyt, rhabdyt, nickielphosphide) oraz węgliki (cohenit). Jednak po pewnym czasie również i te fazy ulegają rozpadowi. Z fosforków wyraźnie ubywa fosforu i przekształcają się one stopniowo w fazy metaliczne, zbliżone do taenitu lub awaruitu. Towarzyszy temu zmiana morfologii kryształów. Uwolniony fosfor wchodzi w skład wtórnych fosforanów typu wiwianit (vivianit). Węgliki zachowują się nieco odmiennie. Węgiel zostaje stopniowo uwalniany do środowiska a w dalszym etapie faza ta ulega całkowitemu rozpadowi przechodząc w wodorotlenki żelaza. Jednymi z ostatnich faz, które można dostrzec wśród wodorotlenków żelaza są wtórne fazy wysokoniklowe. Powyższe odporne na wietrzenie fazy, jako nieobecne na powierzchni Ziemi (z wyjątkiem krzemianów), mogą służyć identyfikacji meteorytowego pochodzenia silnie zwietrzałych skał.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2011, 2; 25-33
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reevesyt i jarosyt – nowe wtórne fazy w meteorycie Morasko
    Reevesite and jarosite – the new secondary phases in Morasko meteorite
    Autorzy:
    Gurdziel, Agnieszka
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033049.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Morasko meteorite
    jarosite
    reevesite
    secondary phases in iron meteorite
    Opis:
    Numerous investigations of Morasko meteorites, have so far identified many secondary mineral phases like: goethite, lepidocrocite, akaganeite, siderite, calcite, ankerite, awaruite, nickel native as well as vivianite. Recently studies on a new found meteorites Morasko, allowed the identification of more secondary minerals. They are represented by: aragonite CaCO3, chukanovite Fe2(CO3)(OH)2 and hellyerite (Ni[CO3]·6H2O) (Karwowski et al. 2011). More detailed analysis of the above phases revealed a new secondary phases, which are represented by: reevesite (Ni6Fe3+2CO3(OH)16·4H2O) as well as jarosite (KFe3+3(OH)6(SO4)2).
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2016, 7; 27-35
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polimineralne nodule w gruboziarnistym meteorycie Morasko
    Polymineral nodules in coarse-grained Morasko meteorite
    Autorzy:
    Karwowski, Łukasz
    Muszyński, Andrzej
    Kryza, Ryszard
    Pilski, Andrzej S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032667.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Morasko iron IAB meteorite
    altaite
    graphite
    meteorites
    oxides
    silicates
    sulphides
    troilite
    Opis:
    Morasko meteorite (IAB octahedrite) contains numerous graphite-troilite inclusions. Within these inclusions, many mineral phases have been found, including native elements, sulphides, tellurides, oxides, phosphates and silicates. Apart from dominant graphite and troilite, the following minerals occur: copper, sphalerite, daubreelite, chromite, cosmochlor, enstatite, albite and orthoclase; phosphates (buchwaldite and brianite) are found occasionally, whereas djerfischerite, altaite, olivine and silica are rare. The mineral composition of the nodules suggests a more complex origin of the Morasko-type meteorites than currently assumed.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2009, 1; 52-58
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pierwiastki syderofilne w meteorytach Morasko
    Siderophile elements in the Morasko meteorites
    Autorzy:
    Pilski, Andrzej S.
    Kryza, Ryszard
    Wasson, John T.
    Muszyński, Andrzej
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1032939.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Jankowo Dolne
    Morasko
    Seeläsgen
    iron meteorites IAB
    meteorites
    siderophile elements
    Opis:
    Sixteen specimens of the Morasko, one specimen of Seeläsgen and one specimen of Jankowo Dolne irons were analyzed with INAA to determine contents of 14 siderophile elements. The samples selected for analyses have their structures described and the presence or absence of cohenite checked. For preliminary interpretation, we have chosen elements determined with highest accuracy: Co, Ni, Ga, As, Ir and Au. The results are shown in tables and diagrams. It has been found that there are no significant differences in composition between fragments with and without cohenite. The observed low contents if iridium are not accompanied by lower contents of elements showing similar behavior during crystallization: platinum and tungsten, which suggests that fractional crystallization was not the reason of lower iridium content. Similar concentrations of elements have been found in all the Morasko specimens, and in the Seeläsgen and Jankowo Dolne irons, which suggests that all these meteorites come from one iron shower.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2012, 3; 62-70
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Nowe znaleziska w rezerwacie „Meteoryt Morasko”
    New finds in the reserve „Metorite Morasko”
    Autorzy:
    Muszyński, Andrzej
    Pilski, Andrzej S.
    Karwowski, Łukasz
    Kryza, Ryszard
    Gurdziel, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1032983.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Morasko meteorite
    meteorites
    meteoryt Morasko
    new find
    nowe znaleziska
    rezerwat
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2013, 4; 136-138
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wietrzenie meteorytów Saint-Aubin i Zegdou w kolekcjach
    Weathering of meteorites Saint-Aubin and Zegdou in collections
    Autorzy:
    Gurdziel, Agnieszka
    Karwowski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/1033050.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Saint-Aubin meteorite
    Zegdou meteorite
    akaganeite in meteorites
    epsomite in meteorites
    weathering meteorite
    Opis:
    Weathering meteorites in different collections carried out in various ways. Its course depends mainly on the conditions which exist in a room, where meteorites are stored as well as on their construction. An important role is also the time. In Saint-Aubin iron meteorite, as a result of weathering, were formed iron hydroxides, mainly akaganeite (beta-Fe3+ (O, OH, Cl)), that occurs in the intergranular spaces and cracks. On plate surfaces of the meteorite Zegdou hydrated magnesium sulfate (most likely epsomite) (MgSO4·7(H2O)) are formed. The thin slice of the Zegdou meteorite stored in a room at constant temperature (about 20°C) and low air humidity underwent significantly, a slower degradation in relation to the tiles of the same meteorite stored in a room variable temperatures and high atmospheric humidity. The differences were observed already over several years.
    Wietrzenie meteorytów w zbiorach kolekcjonerskich przebiega w zróżnicowany sposób. Jego przebieg jest uzależniony głównie od warunków, jakie panują w pomieszczeniu gdzie meteoryty są przechowywane, od upływu czasu oraz od ich budowy. W meteorycie żelaznym Saint-Aubin w wyniku wietrzenia, w przestrzeniach międzyziarnowych i szczelinach, wykształcają się wodorotlenki żelaza, głównie akaganeit (beta-Fe3+ (O, OH, Cl)). Na powierzchniach płytek meteorytu Zegdou powstaje uwodniony siarczan magnezu (najprawdopodobniej epsomit) (MgSO4·7(H2O)). Płytka meteorytu Zegdou przechowywana w pomieszczeniu, w stałej temperaturze (ok. 20°C) i niskiej wilgotności powietrza, ulegała znacznie wolniejszej degradacji w stosunku do płytki tego samego meteorytu, przechowywanego w pomieszczeniu o zmiennych temperaturach i podwyższonej wilgotności. Różnice obserwowano już w przeciągu kilku lat.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2016, 7; 36-44
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Artykuł
    Tytuł:
    Badania mössbauerowskie siarczków żelaza w chondrytach zwyczajnych typu LL
    Mössbauer studies of iron sulphides present in ordinary chondrites type LL
    Autorzy:
    Duda, Przemysław
    Rzepecka, Patrycja
    Jakubowska, Martyna
    Woźniak, Marek
    Karwowski, Łukasz
    Gałązka-Friedman, Jolanta
    Powiązania:
    https://bibliotekanauki.pl/articles/1033078.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    Bjurböle
    Mössbauer spectroscopy
    NWA 8590
    Oued el Hadjar
    iron sulphides
    meteorites
    Opis:
    Mössbauer measurements of three ordinary chondrites type LL were performed at room temperature. Values of spectral areas (SA) connected with troilite were different for investigated meteorites: for Oued el Hadjar – 4.8%, for Bjurböle – 10.6%, for NWA 8590 – 14.9%. Mössbauer spectra were fitted with the use of Recoil program. In all samples values of internal magnetic field and theta angle for subspectrum of troilite were the same: H = 31 T, theta=62°. In the sample of Bjurböle meteorite the signal from pyrrhotite was also noticed (SA = 1.7%, H = 25 T, theta = 33°). For meteorite NWA 8590 two subspectra of pyrrhotite were fitted with following parameters: for pyrrhotite I (SA = 1.1%, H = 27 T, theta= 41°), for pyrrhotite II (SA = 0.7%, H = 22 T, theta = 33°). It is easy to notice that the presence of pyrrhotite is correlated with higher amount of troilite in the samples of ordinary chondrites type LL.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2017, 8; 30-39
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda 4M – nowe zastosowanie spektroskopii mössbauerowskiej w klasyfikacji zrównoważonych chondrytów zwyczajnych
    4M method – the new application of Mössbauer spectroscopy for classification of equilibrated ordinary chondrites
    Autorzy:
    Woźniak, Marek
    Karwowski, Łukasz
    Gałązka-Friedman, Jolanta
    Duda, Przemysław
    Jakubowska, Martyna
    Bogusz, Patrycja
    Powiązania:
    https://bibliotekanauki.pl/articles/1033156.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Meteorytowe
    Tematy:
    4M method
    Cluster Analysis
    Mahalanobis distance
    Multidimensional Discriminant Analysis
    Mössbauer spectroscopy
    Principal Components Analysis
    meteorites
    meteorites classification
    ordinary chondrites
    Opis:
    The 4M method aims to determine the type of equilibrated ordinary chondrite only on the basis of the Mössbauer spectrum of the investigated meteorite. Mössbauer spectrum of non-weathered ordinary chondrite is comprised of four sub-spectra: two doublets and two sextets. One of the doublets consists of a signal from iron present in olivine and the other consists of a signal from iron present in pyroxene. Sextets on the other hand, contain signals from magnetically ordered iron. One sextet is related to the metallic phase (kamacite, taenite), whereas the second is related to troilite. A third of doublets, which emerges in weathered ordinary chondrites, is related to products of the oxidation of iron present in metallic phase. The spectral areas of olivine, pyroxenes, metallic phase and troilite, which were obtained from Mössbauer spectrum are proportional to the number of iron atoms present in relevant mineral phases. Some Mössbauer groups were inspired by this fact to construct different methods to determine the type (H, L, or LL) of investigated meteorites (Gałązka-Friedman et al. 2019, Hyp. Inter. 241(1)). However, these methods, based on subjective criteria, were only qualitative. Our group elaborated a quantitative method, which is based on objective criteria. We called it the "4M method" (where M are derived from meteorites, Mössbauer spectroscopy, multidimensional discriminant analysis (MDA), Mahalanobis distance) (Woźniak et al. 2019). This method was using only the Mössbauer experimental data, to which it applied advanced statistical methods. The base, which was created from Mössbauer data, consisted of three clusters H, L, LL. These clusters were constructed with sets of 4-dimensional vectors. The vectors are comprised of spectral areas of Mössbauer spectrum: ol (value proportional to iron present in olivine), pyr (value proportional to iron present in pyroxene), met (value proportional to iron present in metallic phase), tr (value proportional to iron present in troilite). To determine the type of investigated ordinary chondrite, its ol, pyr, met and tr values with average values of variables obtained for clusters H, L and LL need to be compared. The comparison can be performed with the use of MDA and Mahalanobis distance. Once Mahalanobis distance of the investigated meteoriteis is known, the level of similarity to three types of ordinary chondrites can be calculated. Examples of such calculations were performed for seven ordinary chondrites: Goronyo, Carancas, New Concord, NWA 7733, Leoncin, Sołtmany and Pułtusk. They were made with the use of the new base composed of 62 non-weathered ordinary chondrites. All results obtained with the 4M method yielded results consistent with traditional mineralogical methods.
    Źródło:
    Acta Societatis Metheoriticae Polonorum; 2020, 11; 125-140
    2080-5497
    Pojawia się w:
    Acta Societatis Metheoriticae Polonorum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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