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Tytuł:
Nowe znaleziska mołdawitów w Polsce
A new discovery of moldavites in Poland
Autorzy:
Szopa, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1830276.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Gozdnica
moldavites
tektites
Opis:
Moldavites represent tektites derived from the Ries impact structure ca. 14 Ma. in southern Germany. Approximately 36 moldavite specimens from Poland have been reported since 2012. Characteristic moldavites features, especially bubbles and inclusions of lechatelierite, are reported in all found moldavites. Almost all of them are genetically connected with the Miocene Gozdnica Formation. Only two have been found in Pleistocene sediments, which are part of the Nysa Łużyca river terrace sediments. In 2020, four more moldavites have been collected from Poland. One specimen was found in Gozdnica village, and the other three in Jaroszów village, which is located ~10 km east of Strzegom. Numerous moldavites are generally found in Poland, widely distributed based on the distance from the Ries crater, exceeding 500 km, experimentally determined based on the transport mechanism. However, the lack of the autochthonous tektites indicates that tektites investigated up to now, had to be redeposited in a fluvial environment, probably from the Lusatian area as well as from the Czech Republic.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2021, 12; 81-84
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kolejne znaleziska mołdawitów w Polsce
Another finds of moldavites in Poland
Autorzy:
Szopa, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1033112.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Gozdnica Fm.
Polska
moldavite
tektite
Opis:
22 moldavite species from four different localizations from Poland have been found since 2012. 20 of them are genetically connected with the Gozdnica Fm. (Miocene). Two more were found in Pleistocene sediments, which are part of the Nysa Łużyca terrace river sediments. In last two years, three more moldavites have been collected from Poland. Two specimens were found in Gozdnica, and one in the Lipna village, which is located ~7 km west of Gozdnica.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2018, 9; 123-125
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane reminiscencje z życia prof. dr hab. Łukasza Karwowskiego
Autorzy:
Szopa, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2195039.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
prof. dr hab. Łukasz Karwowski
Opis:
Wybrane reminiscencje z życia prof. dr hab. Łukasza Karwowskiego
Źródło:
Acta Societatis Metheoriticae Polonorum; 2023, 14; 9-17
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Datowanie metamorfizmu z początku Układu Słonecznego: wiek U-Pb apatytu z meteorytu Leoncin (chondryt zwyczajny LL5-6 o charakterze brekcji monomiktycznej)
U-Pb age of the early Solar System metamorphism by using apatite from the Leoncin meteorite (LL5-6 ordinary chondrites – monomictic breccia)
Autorzy:
Szopa, Krzysztof
Karwowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1830279.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
LA-ICP-MS
Leoncin
SEM
formation ages
meteorites
Opis:
The U-Pb system is a useful chronometer for understanding the formation history of chondritic materials. Modern studies showed that the formation ages of chondrites (4.55–4.56 Ga) effectively equal the formation age of the solar system. Recently, researchers have undertaken U-Pb isotopic studies of phosphates separated from equilibrated ordinary chondrites, which are the major hosts for U and are enriched by an order of magnitude or more relative to the bulk rock (typical U concentrations of 0.1–3 ppm in phosphates). The observed Pb-Pb model ages for these phosphates range from 4.563–4.502 Ga, with an analytical precision of 1 Ma and the U-Pb system is apparently concordant. They also argued that the Pb-Pb ages of the phosphates from several H chondrites show a negative correlation with metamorphic grade. They concluded that thermal processing of the equilibrated chondrites took place over a 60 Ma interval and grain size of the phosphates increases with the degree of metamorphism. In the Leoncin meteorite, apatite reveal the 207Pb/206Pb age, which is 4549±61 Ma. The obtained apatite age in the Leoncin meteorite reflects the early solar system formation process. Moreover, the age is an example of the early solar system metamorphism, which confirms a slightly younger event of secondary changes of the parent body for this meteorite. It is also the first isotopic age of a Polish meteorite.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2021, 12; 85-91
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pierwszy tektyt z Wysp Andamańskich (Wyspa Havelock)
The first tektite from Havelock Island in India
Autorzy:
Szopa, Krzysztof
Kotowiecki, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1830322.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Andaman
Havelock Island
Nicobar
strewn field
tektites
Opis:
A tektite is a rare natural glass that forms when an extra-terrestrial body struck the Earth. Tektites can be found in at least five widely separated locations on Earth, which are called strewn fields. There are four known strewn fields: the 35.5 Ma North American strewn field (linked to the Chesapeake crater, North America), the 14.4 Ma Central European strewn field (linked to the Ries crater in Germany), the Ivory Coast strewn field of unknown age (linked to the Bosumtwi crater in Ghana, West Africa), and the 0.8 Ma Australasian strewn field (source crater still unknown, although a large crater in Western Cambodia, Lake Tonle Sap, has been proposed). The last strewn field is known for the distribution of the biggest tektite group (i.e., philippinites, billitonites, javanites, indochinites). A tektite on Havelock Island in India, has also been recently identified. This is the first tektite reported from the Andaman and Nicobar islands. This tektite is composed of indochinite, having a typical dark colour and diagnostic chemical composition. Morphologically, a lack of cracks and abraded edges, both indicate short transport and rapid shallow burial.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2021, 12; 92-97
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ fali uderzeniowej na zmiany tektoniczne osadów jurajskich wokół krateru Ries – studium SEM wybranych skamieniałości
The impact shockwave interaction with Jurassic deposits related to the Ries crater – SEM study of selected fossils
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1033047.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Germany
Ries
belemnites
fossils
shockwave
tectonic
Opis:
Upper Jurassic sediments of the Ries crater contain numerous fossils including massive and calcite belemnites, which show brittle deformations caused by impact shockwave. The structures are observed in macro and micro scale. SEM observations allowed to distinguish different tectonic forms in investigated material, what show the individualism of breccias formed during the Ries impact.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2016, 7; 21-26
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NWA 14360 – Nowy meteoryt z Nigru
A new meteorite from Niger: NWA 14360
Autorzy:
Karwowski, Łukasz
Szopa, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2034032.pdf
Data publikacji:
2022-03
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
ordinary chondrites
NWA 14360
meteorite
meteorites classification
Opis:
The new meteorite was bought as one single stone in 2019 from a dealer in Niger by Tomasz Jakubowski. The meteorite has fusion crust. It contains chondrules of different types with dominance of barred olivine chondrules, with diameter to 1.5 mm. Px and Ol are 78.1 vol%. of the meteorite mass. Pl is up 11.8 vol%. Average fayalite content is 24.93. Metallic phases are 3.0 vol%. Troilite is up to 5.9 vol%. Spinel (Cr-spinel) is up to 0.9 vol%. Average content of the secondary Fe-rich minerals (e.g. hydroxides) is 0.4 vol%. Feldspar composition is: Ab80.2Or5.0An14.8. Mean content of Al2O3, MgO and TiO2 in chromium spinel is 6.70 wt%, 2.05 wt% and 2.02 wt%, respectively. Metal phases are kamacite and tetrataenite. The kamacite has a Ni content in the range 5.83–6.81 wt%, while the Co content is in the range 0.39 to 0.56 wt%. Tetrataenite is has Ni content from 49.68 to 50.46 wt%, and Co up to 0.05 wt%. High-Ca monoclinic pyroxene, similar to diopside, is very rare. Accessory minerals are: chlorapatite and merrylite. Base on chemistry and petrography, the meteorite is classified as ordinary chondrite (L5). The main mass, a 9190 g specimen, is in Krzysztof Socha private collection. Small fragments with the total mass 71 g are stored in Museum of Earth Sciences (catalogue no: WNoZ/Mt/110) at University of Silesia in Katowice, Poland. 39 g was used for thin-section preparation and spectroscopic investigation (Mössbauer spectroscopy).
Źródło:
Acta Societatis Metheoriticae Polonorum; 2022, 13; 47-59
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pierwsze znalezisko polskich mołdawitów
The first discovery of Polish moldavites
Autorzy:
Brachaniec, Tomasz
Karwowski, Łukasz
Szopa, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1032960.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Polska
Ries crater
meteorites
moldavites
strewnfield
tektites
Opis:
In Lower Silesia, in the late Miocene sediments moldavites were discovered. Finding of polish moldavites may change the existing model of tektites distribution, after the impact in the Ries crater area. Further studies are planned and should bring a new information.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2013, 4; 37-38
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Osady molasowe źródłem mołdawitów
Molasse deposits as a source of moldavites
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Szczyrba, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1033000.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
melting
molasse
moldavite origin
substrewnfields
tektites
Opis:
Moldavite are result of melting and mixing of ejecta Cenozoic deposits from Ries crater. The Czech moldavites have different Al, Ca and Si content in contrast to tektites from Lusatian area. Differences in chemical composition of moldavites are caused by local interbedded layers of Tertiary Obere Süâwasser Molasse, which are represented by: quartz sands and limestons with clays.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 25-29
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:
Skład chemiczny i mineralny Szkła Pustyni Libijskiej: badania wstępne z wykorzystaniem mikroskopu skaningowego (SEM) oraz mikrosondy elektronowej (EMPA)
Chemistry and mineral inclusions in the Libyan Desert Glass: preliminary SEM and EMPA investigation
Autorzy:
Szopa, Krzysztof
Brachaniec, Tomasz
Szczyrba, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1033037.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
EMPA
Libyan Desert Glass
SEM
chemical composition
mineral inclusions
tektites
Opis:
In this study, fragment of the Libyan Desert Glass was investigated by using scanning electron microscope (SEM) and electron microprobe (EMP). The analyses reveal two differ areas in chemistry. the first one is homogenous in composition, but the second one is slightly enriched in Ti, and Fe content. During SEM and EMP observation, a relict of primary minerals was noted as a cracked zircon crystals.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2015, 6; 103-106
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Polskie mołdawity – podsumowanie dotychczasowej wiedzy
Polish moldavites – a summary of existing knowledge
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Karwowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1033074.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Miocene
Polska
Ries
fluvial transport
moldavites
tektites
Opis:
Up to now, twenty Polish moldavites were recovered from fluvial deposits of Gozdnica formation. Apart from typical bottle green colour, moldavites also yield other typical features for tektites like presence of bubbles and inclusions of lechatelierite. Low degree of corrosion and palaeogeography suggest river transport flow from Lusatia to the east direction in the Miocene.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 18-22
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polskie mołdawity : obecny stan wiedzy i perspektywy nowych znalezisk
Polish moldavites : the current state of knowledge and perspectives of new finds
Autorzy:
Szopa, Krzysztof
Brachaniec, Tomasz
Karwowski, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2075990.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
mołdawit
tektyt
Nördlinger Ries
miocen
plejstocen
Polska
moldavite
tektite
Miocene
Pleistocene
Polska
Opis:
The first Polish moldavites were discovered in 2012. This paper is a summary of the distribution and inventory of these Polish tektites. Up to the present, 28 moldavites have been described from seven different sandpits. These moldavites were deposited in the upper Miocene fluvial deposits of the Gozdnica Formation, as well as in the Pleistocene river terraces. Apart from a typical bottle green colour, moldavites also have other diagnostics features for this class of tektites, such as the presence of bubbles, inclusions oflechatelierite, as well as the same, homogeneous chemical composition. Fluvial redeposition was interpreted as the main process which determined moldavite distribution. Despite the most recent find of one moldavite specimen in Bielawy, all of these specimens indicate both Lusatian as well as sub-strewn Czech fields as their supply area.
Źródło:
Przegląd Geologiczny; 2019, 67, 8; 662--667
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 36

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