The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf
East Siberian Arctic Shelf, the widest and the shallowest shelf of the World Ocean, covering greater than two million square kilometers, has recently been shown to be a significant modern source of atmospheric methane (CH4). The CH4 emitted to the water column could result from modern methanogenesis...
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Online Access: | https://hdl.handle.net/11250/2833783 https://doi.org/10.3390/w13040397 |
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ftnorskinstvf:oai:niva.brage.unit.no:11250/2833783 2023-05-15T14:57:42+02:00 The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf Guseva, Natalia Moiseeva, Yulia Purgina, Darya Gershelis, Elena Yakushev, Evgeniy Semiletov, Igor 2021 application/pdf https://hdl.handle.net/11250/2833783 https://doi.org/10.3390/w13040397 eng eng MDPI Water. 2021, 13 (4), 397. urn:issn:2073-4441 https://hdl.handle.net/11250/2833783 https://doi.org/10.3390/w13040397 cristin:1954825 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 by the authors CC-BY 14 13 Water 4 397 Peer reviewed Journal article 2021 ftnorskinstvf https://doi.org/10.3390/w13040397 2023-02-21T08:46:28Z East Siberian Arctic Shelf, the widest and the shallowest shelf of the World Ocean, covering greater than two million square kilometers, has recently been shown to be a significant modern source of atmospheric methane (CH4). The CH4 emitted to the water column could result from modern methanogenesis processes and/or could originate from seabed deposits (pre-formed CH4 preserved as free gas and/or gas hydrates). This paper focuses primarily on understanding the source and transformation of geofluid in the methane seepage areas using ions/trace elements and element ratios in the sediment pore-water. Six piston cores and totally 42 pore-water samples were collected in the East Siberian Sea and the Laptev Sea at water depths ranging from 22 to 68 m. In the active zones of methane release, concentrations of vanadium, thorium, phosphorus, aluminum are increased, while concentrations of cobalt, iron, manganese, uranium, molybdenum, copper are generally low. The behavior of these elements is determined by biogeochemical processes occurring in the pore-waters at the methane seeps sites (sulfate reduction, anaerobic oxidation of methane, secondary precipitation of carbonates and sulfides). These processes affect the geochemical environment and, consequently, the species of these elements within the pore-waters and the processes of their redistribution in the corresponding water–rock system. publishedVersion Article in Journal/Newspaper Arctic East Siberian Sea laptev Laptev Sea Norwegian Institute for Water research: NIVA Open Access Archive (Brage) Arctic East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Laptev Sea Water 13 4 397 |
institution |
Open Polar |
collection |
Norwegian Institute for Water research: NIVA Open Access Archive (Brage) |
op_collection_id |
ftnorskinstvf |
language |
English |
description |
East Siberian Arctic Shelf, the widest and the shallowest shelf of the World Ocean, covering greater than two million square kilometers, has recently been shown to be a significant modern source of atmospheric methane (CH4). The CH4 emitted to the water column could result from modern methanogenesis processes and/or could originate from seabed deposits (pre-formed CH4 preserved as free gas and/or gas hydrates). This paper focuses primarily on understanding the source and transformation of geofluid in the methane seepage areas using ions/trace elements and element ratios in the sediment pore-water. Six piston cores and totally 42 pore-water samples were collected in the East Siberian Sea and the Laptev Sea at water depths ranging from 22 to 68 m. In the active zones of methane release, concentrations of vanadium, thorium, phosphorus, aluminum are increased, while concentrations of cobalt, iron, manganese, uranium, molybdenum, copper are generally low. The behavior of these elements is determined by biogeochemical processes occurring in the pore-waters at the methane seeps sites (sulfate reduction, anaerobic oxidation of methane, secondary precipitation of carbonates and sulfides). These processes affect the geochemical environment and, consequently, the species of these elements within the pore-waters and the processes of their redistribution in the corresponding water–rock system. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Guseva, Natalia Moiseeva, Yulia Purgina, Darya Gershelis, Elena Yakushev, Evgeniy Semiletov, Igor |
spellingShingle |
Guseva, Natalia Moiseeva, Yulia Purgina, Darya Gershelis, Elena Yakushev, Evgeniy Semiletov, Igor The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf |
author_facet |
Guseva, Natalia Moiseeva, Yulia Purgina, Darya Gershelis, Elena Yakushev, Evgeniy Semiletov, Igor |
author_sort |
Guseva, Natalia |
title |
The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf |
title_short |
The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf |
title_full |
The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf |
title_fullStr |
The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf |
title_full_unstemmed |
The Impact of Methane Seepage on the Pore-Water Geochemistry across the East Siberian Arctic Shelf |
title_sort |
impact of methane seepage on the pore-water geochemistry across the east siberian arctic shelf |
publisher |
MDPI |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2833783 https://doi.org/10.3390/w13040397 |
long_lat |
ENVELOPE(166.000,166.000,74.000,74.000) |
geographic |
Arctic East Siberian Sea Laptev Sea |
geographic_facet |
Arctic East Siberian Sea Laptev Sea |
genre |
Arctic East Siberian Sea laptev Laptev Sea |
genre_facet |
Arctic East Siberian Sea laptev Laptev Sea |
op_source |
14 13 Water 4 397 |
op_relation |
Water. 2021, 13 (4), 397. urn:issn:2073-4441 https://hdl.handle.net/11250/2833783 https://doi.org/10.3390/w13040397 cristin:1954825 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 by the authors |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3390/w13040397 |
container_title |
Water |
container_volume |
13 |
container_issue |
4 |
container_start_page |
397 |
_version_ |
1766329824668811264 |