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- Title
Lithogeochemistry of Vendian fine-grained clastic rocks in the Nepa-Zhuya region of the Siberian Platform.
- Authors
Podkovyrov, V.; Kotova, L.; Golubkova, E.; Ivanovskaya, A.
- Abstract
The possibility of reconstructing lithogenetic settings, composition of rocks in provenances, and geodynamic regimes characteristic of the formation of Vendian rocks in the Patom and Nepa-Botuoba sedimentary basins during the late Dal'nyaya Taiga-early Zhuya time and defining interrelations between organic-walled fossils and depositional environments is considered on the basis of the lithogeochemical data. For reconstructing paleogeodynamic depositional settings of sedimentary sequences, several well-known discriminant diagrams, such as KO/NaO-SiO/AlO, SiO-KO/NaO, and Th-La-Sc, were used. It is shown that some of them may be used with a variable degree of reliability for reconstructing depositional environments for platformal sedimentary successions composed of both sandstones and fine-grained clastic rocks. The most taxonomically diverse and abundant microfossil assemblages from the Ura and Parsha formations of the Zhuya-Lena area and Nepa-Botuoba anticlinorium, respectively, are confined to structurally and mineralogically immature silty-clayey shelf sediments buried rapidly under new portions of sediments in disoxic environments.
- Subjects
CLASTIC rocks; GEODYNAMICS; SEDIMENTARY basins; SEDIMENTATION &; deposition; SANDSTONE; FOSSIL microorganisms
- Publication
Lithology & Mineral Resources, 2015, Vol 50, Issue 4, p299
- ISSN
0024-4902
- Publication type
Article
- DOI
10.1134/S0024490215040057