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Klast stopu impaktowego w brekcji pułtuskiej

100%
Krzesińska A. M.
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vol. 9
74-91
EN
The Pułtusk H chondritic breccia records a complex impact history and contains various products of impact metamorphism. Here, impact melt lithology is described, which is embedded into the Pułtusk breccia. The impact melt clast is formed by microcrystalline quenched silicates and metal-troilite globules and chondritic relicts are retained in the melt. The relicts record strong shock deformation, S4–S5 and they have well developed foliated fabric of metal grains. The melt formed by severe collision and impact melting on the parent body. The chondritic material was superheated and molten. Silicate melt unmixed from the metal-sulphide melt and both were rapidly quenched. Most likely the event occurred during Late Heavy Bombardment, ~3.6 Ga.
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Badanie zawartości radionuklidów kosmogenicznych oraz składu mineralnego skał w celu weryfikacji ich pozaziemskiego pochodzenia

27%
Tymiński Z., Burakowska A., Jaśkiewicz A., Tymińska K., Stolarz M., Kuć M., Marganiec-Gałązka J., Czudek M., Saganowski P., Iller E., Krzesińska A. M.
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vol. 15
142-153
EN
Cosmogenic radionuclides in meteoroids are produced in space in the process of activation. These nuclides have various lifetimes in range from a few days to several hundred thousand years and can therefore be helpful in solving several problems related to the study of meteoroids and their remains, both in space and on the Earth. The simplest application of cosmogenic radionuclide decay in meteorites is to determine the terrestrial age of meteorites, especially those whose fall has not been observed. In this article, we present an additional application of cosmogenic radionuclide measurements, namely for the verification of origin of rocks that show equivocal features and may potentially represent meteorites.
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