Reasons for the outbreak of microphytoplankton productivity in the late Oligocene Turtas Lake–Sea, Western Siberia
- Autores: Kuzmina O.1, Kuzmin D.2, Shurygin B.1
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Afiliações:
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch
- Sobolev Institute of Geology and Mineralogy, Siberian Branch
- Edição: Volume 474, Nº 2 (2017)
- Páginas: 620-623
- Seção: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/190010
- DOI: https://doi.org/10.1134/S1028334X17060204
- ID: 190010
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Resumo
Palynological (dinocysts) and geochemical data were compared for the first time for Paleogene sediments of borehole no. 8 (settlement of Russkaya Polyana, Omsk oblast). The layers with a concentrated amount of dinocysts of the genus Pseudokomewuia (20.5% of the palynocomplex) are characterized by higher contents of Fe, P, Ti, Nb, Ta, and W. The microphytoplankton bloom (an analog of the present-day red tides) in the late Oligocene Turtas Lake–Sea was probably caused by a greater contribution of nutrient substances from the continent during the transgression of this basin. Comparative analysis of the geochemical features of marine and continental Paleogene sediments from borehole no. 8 showed that the Turtas basin was either freshwater or had brackish water.
Sobre autores
O. Kuzmina
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch
Autor responsável pela correspondência
Email: KuzminaOB@ipgg.sbras.ru
Rússia, Novosibirsk
D. Kuzmin
Sobolev Institute of Geology and Mineralogy, Siberian Branch
Email: KuzminaOB@ipgg.sbras.ru
Rússia, Novosibirsk
B. Shurygin
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch
Email: KuzminaOB@ipgg.sbras.ru
Rússia, Novosibirsk