Effect of Trap Magmatism on the Geochemistry of Gases in the North-Western Regions of the Siberian Platform

A. O. Gordeeva, D. A. Novikov, F. F. Dultsev, A. V. Chernykh

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференциирецензирование

Аннотация

Results of the studies into the effect of trap magmatism on the geochemistry of gases (free and dissolved in water) and their zoning within the boundaries of north-western regions of the Siberian Platform are reported. The maximal paleotemperatures at the moment of trap intrusion reached 650 �C at the contact for the major productive horizons: Silurian (Devilish), Ordovician (Baikit), and Cambrian (Deltulino-Tanachinsky, Abakunsky, and Moktakonsky). Hydrocarbon gases in the free and water-dissolved phases were subjected to degradation in the most active form. For instance, carbon dioxide dominates, with its content more than 90 vol. % and methane content up to 5 vol. % in intrusion-affected zone at a distance up to 100 m, while at a distance of 250 m CO2 concentration decreases to 30 vol. %, and CH4 concentration increases to 60-70 vol. %. No significant effect of the thickness of intrusion on gas composition was revealed.

Язык оригиналаанглийский
Номер статьи052055
ЖурналIOP Conference Series: Earth and Environmental Science
Том666
Номер выпуска5
DOI
СостояниеОпубликовано - 9 мар 2021
Событие2020 International Science and Technology Conference on Earth Science, ISTCEarthScience 2020 - Vladivostok, Российская Федерация
Продолжительность: 6 окт 20209 окт 2020

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