Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean
The continental margins of the East Siberian Sea and Arctic Ocean are among the Earth’s most inaccessible marine environments for hydrocarbon research due to the almost year-round presence of ice cover. Despite this, limited preliminary assessments which have been carried out to date have all yielde...
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ftdoajarticles:oai:doaj.org/article:3730c909a3d240f587fade2c0b8588d4 2023-05-15T14:54:41+02:00 Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean Andrey Yatsuk Alexander Gresov Glen Tritch Snyder 2022-05-01T00:00:00Z https://doi.org/10.3389/feart.2022.856496 https://doaj.org/article/3730c909a3d240f587fade2c0b8588d4 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2022.856496/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.856496 https://doaj.org/article/3730c909a3d240f587fade2c0b8588d4 Frontiers in Earth Science, Vol 10 (2022) methane hydrocarbons carbon isotopes genesis East Siberian Arctic shelf Science Q article 2022 ftdoajarticles https://doi.org/10.3389/feart.2022.856496 2022-12-30T21:26:35Z The continental margins of the East Siberian Sea and Arctic Ocean are among the Earth’s most inaccessible marine environments for hydrocarbon research due to the almost year-round presence of ice cover. Despite this, limited preliminary assessments which have been carried out to date have all yielded some indication of high oil and gas production potential in these regions. This article presents the results of gas-geochemical studies of seafloor sediments of the East Siberian Sea, obtained in three expeditions onboard the R/V “Akademik Lavrentiev” in 2008 (LV45), 2016 (LV77), and 2020 (LV90). The composition of sorbed hydrocarbon gases in seafloor sediments was analyzed. In addition, the stable isotopic composition of carbon was determined for CH4, C2H6, and CO2 in gases, which were desorbed from marine sediments. The sediments were also analyzed for organic matter content. Despite the absence of observable gas seepage directly into the water column, at some stations, increased concentrations of methane and hydrocarbon gases were encountered, indicating the widespread predominance of thermogenically derived gases. We present a hydrocarbon classification system which delineates eight identifiable sources of regional gas occurrences (coal gas, igneous rocks, solid bitumen, condensate-gas, gas-condensate, oil gas, gas oil, and oil gases). A stable isotopic analysis of carbon in CH4, C2H6, and CO2 indicates varying degrees of mixing between a shallow, early-kerogen gas source and a deeper mantle carbon source in some areas of the study. Article in Journal/Newspaper Arctic Arctic Ocean East Siberian Sea Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Frontiers in Earth Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
methane hydrocarbons carbon isotopes genesis East Siberian Arctic shelf Science Q |
spellingShingle |
methane hydrocarbons carbon isotopes genesis East Siberian Arctic shelf Science Q Andrey Yatsuk Alexander Gresov Glen Tritch Snyder Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean |
topic_facet |
methane hydrocarbons carbon isotopes genesis East Siberian Arctic shelf Science Q |
description |
The continental margins of the East Siberian Sea and Arctic Ocean are among the Earth’s most inaccessible marine environments for hydrocarbon research due to the almost year-round presence of ice cover. Despite this, limited preliminary assessments which have been carried out to date have all yielded some indication of high oil and gas production potential in these regions. This article presents the results of gas-geochemical studies of seafloor sediments of the East Siberian Sea, obtained in three expeditions onboard the R/V “Akademik Lavrentiev” in 2008 (LV45), 2016 (LV77), and 2020 (LV90). The composition of sorbed hydrocarbon gases in seafloor sediments was analyzed. In addition, the stable isotopic composition of carbon was determined for CH4, C2H6, and CO2 in gases, which were desorbed from marine sediments. The sediments were also analyzed for organic matter content. Despite the absence of observable gas seepage directly into the water column, at some stations, increased concentrations of methane and hydrocarbon gases were encountered, indicating the widespread predominance of thermogenically derived gases. We present a hydrocarbon classification system which delineates eight identifiable sources of regional gas occurrences (coal gas, igneous rocks, solid bitumen, condensate-gas, gas-condensate, oil gas, gas oil, and oil gases). A stable isotopic analysis of carbon in CH4, C2H6, and CO2 indicates varying degrees of mixing between a shallow, early-kerogen gas source and a deeper mantle carbon source in some areas of the study. |
format |
Article in Journal/Newspaper |
author |
Andrey Yatsuk Alexander Gresov Glen Tritch Snyder |
author_facet |
Andrey Yatsuk Alexander Gresov Glen Tritch Snyder |
author_sort |
Andrey Yatsuk |
title |
Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean |
title_short |
Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean |
title_full |
Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean |
title_fullStr |
Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean |
title_full_unstemmed |
Hydrocarbon Gases in Seafloor Sediments of the Edge Shelf Zone of the East Siberian Sea and Adjacent Part of the Arctic Ocean |
title_sort |
hydrocarbon gases in seafloor sediments of the edge shelf zone of the east siberian sea and adjacent part of the arctic ocean |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/feart.2022.856496 https://doaj.org/article/3730c909a3d240f587fade2c0b8588d4 |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) |
geographic |
Arctic Arctic Ocean East Siberian Sea |
geographic_facet |
Arctic Arctic Ocean East Siberian Sea |
genre |
Arctic Arctic Ocean East Siberian Sea |
genre_facet |
Arctic Arctic Ocean East Siberian Sea |
op_source |
Frontiers in Earth Science, Vol 10 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2022.856496/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2022.856496 https://doaj.org/article/3730c909a3d240f587fade2c0b8588d4 |
op_doi |
https://doi.org/10.3389/feart.2022.856496 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
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1766326443379261440 |