TY - JOUR

T1 - Effect of Trap Magmatism on the Geochemistry of Gases in the North-Western Regions of the Siberian Platform

AU - Gordeeva, A. O.

AU - Novikov, D. A.

AU - Dultsev, F. F.

AU - Chernykh, A. V.

N1 - Funding Information: The research was conducted with the financial support from the Fundamental Research Program of the Russian Academy of Sciences (Project No. 0331-2019-0025), the RFBR (Project No. 18-05-70074 “Arctic Resources”), RFBR and the Government of the Novosibirsk Region within the scientific Projects No. 18-45-540004 and No. 19-45-540006. Publisher Copyright: © 2021 Published under licence by IOP Publishing Ltd. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/3/9

Y1 - 2021/3/9

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85102764521&partnerID=8YFLogxK

U2 - 10.1088/1755-1315/666/5/052055

DO - 10.1088/1755-1315/666/5/052055

M3 - Conference article

AN - SCOPUS:85102764521

VL - 666

JO - IOP Conference Series: Earth and Environmental Science

JF - IOP Conference Series: Earth and Environmental Science

SN - 1755-1307

IS - 5

M1 - 052055

T2 - 2020 International Science and Technology Conference on Earth Science, ISTCEarthScience 2020

Y2 - 6 October 2020 through 9 October 2020

ER -