Features of Carbonaceous Rocks Surrounding the Kara Astrobleme: Statistical Analysis of Geochemical Data.

Upper Paleozoic (D3–P1) carbonaceous shales and siltstones in the surrounding of the Kara astrobleme are studied. The material composition of the target rocks is analyzed by methods of multidimensional statistics—correlation, factorial, and hierarchical cluster methods. As a result, we revealed the geochemical specificity of the components, generally indicating the contamination of the target rocks of the Kara astrobleme by some ore and rare earth elements by the post-impact hydrothermal activity, mobilization, redeposition, and concentration of the substance. The analysis of the contents of Ni, Cr, and Co indicates partial enrichment of the target rocks by cosmic matter in the area of intense impact crushing, disintegration, and hydrothermal mineralization. [ABSTRACT FROM AUTHOR]