Abstract
The formation of impactites, especially tagamites, due to impact melting of gneisses is confirmed by the coincidence of chemical compositions of both of these formations. Suevites are somewhat enriched in the components of sedimentary rocks, the fragments of which are present in them in significant amount. Statistic analysis of chemical parameters of impact melt rocks shows a very high degree of homogenization as well as the absence of significant processes of component redistribution during melt cooling and crystallization. Geochemical studies have shown that impactites in comparison with gneisses are enriched in siderophiles and platinum group elements. It indicates a contamination of impact melt with the substance of the collided cosmic body that had the composition of ordinary chondrite.
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Raikhlin, A.I., Masaitis, V.L. (2019). Petrochemistry and Geochemistry of Impactites and Target Crystalline Rocks. In: Masaitis, V. (eds) Popigai Impact Structure and its Diamond-Bearing Rocks. Impact Studies. Springer, Cham. https://doi.org/10.1007/978-3-319-77988-1_5
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DOI: https://doi.org/10.1007/978-3-319-77988-1_5
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