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Wyświetlanie 1-7 z 7
Tytuł:
Trynityt – wstępne dane SEM oraz XRD szkliwa nuklearnego z USA
Preliminary SEM and XRD investigation on nuclear trinitite from USA
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Krzykawski, Tomasz
Broszkiewicz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1033027.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
XRD
glass
nuclear bomb
tektite
trinitite
Opis:
Trinitite is a glass produced as a result of a nuclear explosion. The characteristic feature of the investigated material are bubbles and presence of incompletely melted quartz grains.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2015, 6; 38-41
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Migracja żelaza w indochinicie podczas jego wygrzewania w 1100°C: badania EMPA i XRD
Iron migration in indochinite during heating in 1100°C: EMPA and XRD investigation
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Krzykawski, Tomasz
Broszkiewicz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1033002.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
heating
indochinite
iron
tektites
Opis:
Iron reach tektite represented by indochinite was examined by using EMP and XRD after 120 min long heating in oxide atmosphere at 1100°C. The electron microprobe analyses as well as BSE images reveal loss of iron in tektite bulk composition. Iron as a element was incorporated into a new, probable mineral phase that is mostly present on the surface of the indochinite. Size and textural relation of the Fe-rich phase does not permit to analize it. XRD data does not reveal presence of any mineral rich in Fe including metallic iron.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 47-51
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fragmenty kopalnego meteorytu z Lechówki: charakterystyka mineralogiczna i geochemiczna
Fragments of strongly weathered meteorite from Lechówka: mineralogical and geochemical characterisation
Autorzy:
Szopa, Krzysztof
Karwowski, Łukasz
Krzykawski, Tomasz
Brachaniec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033087.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Cretaceous-Paleogene boundary
Lechówka
fossil iron meteorites
kamacite
meteorites
paleometeorite
schreibersite
taenite
Opis:
Fossil iron meteorites are extremely rare in the geological sedimentary record. In the boundary clay from the outcrop at the Lechówka quarry (Poland), fragments of the paleometeorite were found in the Cretaceous-Paleogene boundary clay layer. The fragments of meteorite (2–6 mm in size) and meteoritic dust are metallic-grey in colour. Analyses of the meteorite from Lechówka reveal the presence of Ni-rich minerals with a total Ni amount of 2–3 wt%. They are represented by: taenite, kamacite, schreibersite, Ni-rich magnetite, and Ni-rich goethite. The investigated remnants of paleometeorite apparently represent an independent fall and does not seem to be derived from the K-Pg impactor.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 100-109
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jak odróżnić oryginał od fałszywek: kopalny meteoryt z Lechówki
How to distinguish the original from fakes: the fossil meteorite from Lechówka
Autorzy:
Szopa, Krzysztof
Karwowski, Łukasz
Krzykawski, Tomasz
Brachaniec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033111.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Lechówka meteorite
fake meteorite
fossil meteorite
Opis:
Value of meteorites can be explained at least in two aspects. From the scientific point of view they are priceless objects, which can bring important information about the very beginning of the Universe. Because of their rarity anduniqueness, the meteorites often are extremely expensive in the term of a commercial value. This situation is used by dishonest sellers who offer fake meteorites. It has happened with the paleometeorite remnants, which were originallyfound in Cretaceous-Paleogene clay boundary in Lechówka, Poland. The so-called fake Lechówka remnants were offered by one seller on domestic online shops. All grains had certificate of authenticity that was included with the sold grains. In this paper we described the most common and diagnostic features, which can be easily applied to distinguish the original meteorite remnants from the fake ones.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2018, 9; 112-122
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topliwość tektytów
Tektites melting
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Krzykawski, Tomasz
Broszkiewicz, Adam
Szczyrba, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1032996.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
experiment
melting
tektites
temperature
Opis:
In this paper, results of melting experiment of tektites are presented. Tektites from four strewnfields: North American, Central European, Ivory Coast and Australasian were used. The fragments of investigated tektites were heated in oxide atmosphere in 1100oC in two time intervals: 5 and 120 minutes. The temperature of 1100oC is too low for completely melting of the studied material despite to heating in the same conditions but in small area (eg. in a spot).
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 21-24
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sferule z granicy Kreda-Paleogen (Lechówka, Polska) – wstępne dane
Spherules from the Cretaceous–Paleogene boundary (Lechówka, Polska) – preliminary data
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Karwowski, Łukasz
Krzykawski, Tomasz
Salamon, Mariusz
Brom, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1033022.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Cretaceous–Paleogene boundary
impact origin
smectite
spherule
spinel
Opis:
Samples of boundary clay from Cretaceous–Paleogene deposits from Lechówka, Poland were examined for spherules to confirm the impact origin of the sediment. The chemical composition of investigated spherules show similarities to material from the K–Pg boundary from Stevns Klint. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The deposits with spherules are built by smectite with Al and Mg enrichment. This cheto smectite is forming as a result of the weathering of the impact glass.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2015, 6; 17-22
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neoproterozoic ophiolite exotic blocks in the Outer Western Carpathians, southern Poland : a record of the fast ocean-floor cooling and alterations
Autorzy:
Gawęda, Aleksandra
Szopa, Krzysztof
Waśkowska, Anna
Golonka, Jan
Krzykawski, Tomasz
Kalinichenko, Tatiana
Powiązania:
https://bibliotekanauki.pl/articles/27323309.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Outer Carpathians
Neoproterozoic
ophiolite mélange
ocean floor
Opis:
Ophiolitic blocks, represented by metagabbro and serpentinite containing relict pyroxene, olivine, baddeleyite, zirconolite, Ni-pyrite and pyrrhotite, were found as exotic blocks in an olistostrome in the Magura Nappe, Outer Western Carpathians. The geochemical and isotopic features of the blocks suggest they represent mantle-derived rocks, with within-plate geochemistry signatures, modified by subduction, with lithospheric mantle input. A U-Pb apatite cooling age (614 ±3 Ma) is within age uncertainty of a published U-Pb zircon magmatic crystallization age (~614 Ma) implying rapid post-crystallization cooling. Pervasive alteration with replacement of primary minerals by low-temperature assemblages is observed in all rock fragments and is interpreted as contemporaneous with shearing. The secondary mineral assemblages and temperature modelling allow the interpretation that the pervasive ocean-floor metamorphism is the alteration in these meta-mafic rocks. These ophiolitic fragments can be linked to the Neoproterozoic break up of Rodinia/Pannotia.
Źródło:
Geological Quarterly; 2023, 67, 1; art. no. 9
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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