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Finding of probable Tunguska Cosmic Body material: anomalies in platinum group elements in peat from the explosion area

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Further evidencies of a cometary nature of the 1908 Tunguska Cosmic Body (TCB) are presented. Earlier in the event layers of the Sphagnum fuscum peat from the explosion area, anomalies, relative to Earth-materials, of the elements H, C, and N—all abundant in comets—have been found [E.W. Kolesnikov, T. Boettger and N.V. Kolesnikova, Planet. Space Sci. 47 905 (1999); E.M. Kolesnikov, G. Longo, T. Boettger, N.V. Kolesnikova, P. Gioacchini, L. Forlani, R. Giampieri and R. Serra, Icarus 161 235 (2003).]. At the present work we revealed a sharp increase of concentrations of platinum group elements (PGE), REE and other elements in the event layers as well. Their ratios point to a cometary nature of the anomalies observed.

Keywords: Carbonaceous chondrites; Comets; Isotopes; Peat; Platinoids; Tunguska

Document Type: Research Article


Affiliations: 1: Dept. of Geochemistry, Geological Faculty of Moscow State University, 119992, Moscow, Russia 2: Institute of Geology and Geophysics, Chinese Academy of Sciences, 9825, Beijing, 100029, P. R. China

Publication date: April 1, 2005

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