LOCAL AND REGIONAL VARIABILITY IN COMPOSITION OF PERMIAN-TRIASSIC EFFUSIVE TRAPS OF THE SIBERIAN PLATFORM
V.N. Sharapov, Yu.R. Vasil'ev, A.I. Al'mukhamedov*, and A.Ya. Medvedev*
Institute of Geology, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia
* Institute of Geochemistry, Siberian Branch of the RAS, 1a ul. Favorskogo, Irkutsk, 664033, Russia
Keywords: Effusive traps, Siberian Platform, local and regional zoning
Pages: 709-721
Abstract
The sections existing in the Permian-Triassic effusive traps of the Siberian Platform (SP) are of three types: (1) monotonous, with slightly altered composition of tholeiites within several successive formations in the same section; (2) with lava composition regularly changed from trachybasalts to picritoids, with a certain petrochemical trend in particular
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