Conditions for the Formation of Siliceous Rocks of the Lower and Middle Cambrian in the Southeast of the Siberian Platform.

Autor:	Merenkova, S. I., Kalmykov, G. A., Gabdullin, R. R., Karpova, E. V., Puzik, A. Yu., Badianova, I. V., Volkova, M. A., Kazymov, K. P.
Zdroj:	Moscow University Geology Bulletin; Feb2023, Vol. 78 Issue 1, p70-81, 12p
Abstrakt:	A study of the microstructure and geochemical features of bedded cherts of the Inikan Formation (Є1–2in) from coastal outcrops of the Yudoma River shows that the key role in their formation apparently belongs to siliceous organisms: radiolarians and sponges. The Ge/Si ratio indicates that there is no direct contribution of fluids to the formation of cherts in this part of the paleobasin. The studied chalcedony-quartz rocks were formed of primary biogenic silica that underwent diagenetic redistribution and post-diagenetic processes. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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