Setting of the Formation of Paleozoic Picrite Basalt Complexes in the West Siberian Plate Basement
- Authors: Simonov V.A.1, Kontorovich V.A.2, Stupakov S.I.1, Filippov Y.F.2, Saraev S.V.2, Kotlyarov A.V.1
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Affiliations:
- Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
- Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences
- Issue: Vol 486, No 2 (2019)
- Pages: 613-616
- Section: Geology
- URL: https://journals.rcsi.science/1028-334X/article/view/195035
- DOI: https://doi.org/10.1134/S1028334X19060217
- ID: 195035
Cite item
Abstract
40Ar/39Ar analysis showed a simultaneous (at about 490 Ma) formation of the Paleozoic picrite and basalt complexes of the West Siberian Plate basement. The petrochemistry, trace and REE geochemistry, and composition of clinopyroxene indicate the formation of the picrite of well no. 11 (Chkalov area) as a result of intraplate magmatism of the OIB type. Calculations based on the compositions of clinopyroxene allowed crystallization of minerals of porphyric picrite at 1215–1275°C and 4.5–8 kbar. In general, it has been found that the picrite basalt complexes considered were formed from enriched igneous plume systems under intraplate conditions near the active margin of the ancient ocean.
About the authors
V. A. Simonov
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
Author for correspondence.
Email: simonov@igm.nsc.ru
Russian Federation, Novosibirsk
V. A. Kontorovich
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences
Email: stupakov@igm.nsc.ru
Russian Federation, Novosibirsk, 630090
S. I. Stupakov
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
Author for correspondence.
Email: stupakov@igm.nsc.ru
Russian Federation, Novosibirsk
Yu. F. Filippov
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences
Email: stupakov@igm.nsc.ru
Russian Federation, Novosibirsk, 630090
S. V. Saraev
Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch, Russian Academy of Sciences
Email: stupakov@igm.nsc.ru
Russian Federation, Novosibirsk, 630090
A. V. Kotlyarov
Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences
Email: stupakov@igm.nsc.ru
Russian Federation, Novosibirsk