Setting of the Formation of Paleozoic Picrite Basalt Complexes in the West Siberian Plate Basement

V. A. Simonov, V. A. Kontorovich, S. I. Stupakov, Yu F. Filippov, S. V. Saraev, A. V. Kotlyarov

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

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.

Язык оригиналаанглийский
Страницы (с-по)613-616
Число страниц4
ЖурналDoklady Earth Sciences
Том486
Номер выпуска2
DOI
СостояниеОпубликовано - 1 июн 2019
Опубликовано для внешнего пользованияДа

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