Geochemistry of highly aluminiferous Vendian-Cambrian sediments of the Tunka Bald Mountains, East Sayan
作者： S. I. Shkol’nik , I. G. Barash , V. G. Belichenko , E. F. Letnikova
DOI: 10.1134/S1028334X11010193
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摘要: This paper presents comprehensive geochemical characteristics of highly aluminiferous schists discovered in the Tunka Bald Mountains and associated with Vendian-Cambrian cover Tuva-Mongolian Microcontinent. The Al2O3 content varies within a wide range, maximum being up to 36.11 wt. %. A specific feature composition these rocks is simultaneously high contents Cr (up 1400 ppm), V 2700 Zr 800 ppm). origin has been interpreted, conditions which formed have considered. Based on data, it assumed that main could be weathering crusts after ultramafic mafic rocks, felsic source playing secondary role.
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