IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH
An increasing rate of degradation of coastal and subsea permafrost leads to remobilization of huge amounts of organic carbon. To know how this remobilized carbon behaves while being transported through the land-shelf system is crucially important for understanding an extremely fragile Arctic ecosyst...
Published in: | Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov |
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Language: | Russian |
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Tomsk Polytechnic University
2020
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Online Access: | https://doi.org/10.18799/24131830/2020/8/2780 https://doaj.org/article/560768d22dcb40a6b732273c40a0153c |
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ftdoajarticles:oai:doaj.org/article:560768d22dcb40a6b732273c40a0153c 2023-05-15T14:53:41+02:00 IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH Elena V. Gershelis Roman S. Kashapov Alexey S. Ruban Irina A. Oberemok Andrey A. Leonov Denis V. Chernykh Oleg V. Dudarev Igor P. Semiletov 2020-08-01T00:00:00Z https://doi.org/10.18799/24131830/2020/8/2780 https://doaj.org/article/560768d22dcb40a6b732273c40a0153c RU rus Tomsk Polytechnic University http://izvestiya.tpu.ru/archive/article/view/2780/2296 https://doaj.org/toc/2500-1019 https://doaj.org/toc/2413-1830 doi:10.18799/24131830/2020/8/2780 2500-1019 2413-1830 https://doaj.org/article/560768d22dcb40a6b732273c40a0153c Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 331, Iss 8, Pp 189-198 (2020) pyrolysis bottom sediments organic matter hydrocarbons arctic laptev sea Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 article 2020 ftdoajarticles https://doi.org/10.18799/24131830/2020/8/2780 2022-12-31T07:00:26Z An increasing rate of degradation of coastal and subsea permafrost leads to remobilization of huge amounts of organic carbon. To know how this remobilized carbon behaves while being transported through the land-shelf system is crucially important for understanding an extremely fragile Arctic ecosystem. This study is aimed at tracing the geochemical signals of organic matter along the profile from the coastal zone to the continental slope of the Laptev Sea, using the Rock-Eval approach. We investigated surface sediment samples obtained during the Arctic marine expeditions of 2018–2019 on the R/V “Akademik Mstislav Keldysh». The most active oxidation of organic matter, exported with river runoff and products of coastal erosion, occurs in the coastal zone at a depth of several tens of meters. A significant effect on the organic matter composition is exerted by the sediment export from Novosibirsk Islands eroding coastlines. We assume that various products carried by river runoff and coastal erosion are characterized by various signatures detected by the Rock-Eval method (e.g., the OI and Tpeak values). It is also shown that the mineral matrix does not seem to provide a first-order control on preventing organic matter degradation during transport from the coastal zone to deep-sea basins. Article in Journal/Newspaper Arctic laptev Laptev Sea permafrost Directory of Open Access Journals: DOAJ Articles Arctic Laptev Sea Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov 331 8 189 198 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
pyrolysis bottom sediments organic matter hydrocarbons arctic laptev sea Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
spellingShingle |
pyrolysis bottom sediments organic matter hydrocarbons arctic laptev sea Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 Elena V. Gershelis Roman S. Kashapov Alexey S. Ruban Irina A. Oberemok Andrey A. Leonov Denis V. Chernykh Oleg V. Dudarev Igor P. Semiletov IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH |
topic_facet |
pyrolysis bottom sediments organic matter hydrocarbons arctic laptev sea Engineering geology. Rock mechanics. Soil mechanics. Underground construction TA703-712 |
description |
An increasing rate of degradation of coastal and subsea permafrost leads to remobilization of huge amounts of organic carbon. To know how this remobilized carbon behaves while being transported through the land-shelf system is crucially important for understanding an extremely fragile Arctic ecosystem. This study is aimed at tracing the geochemical signals of organic matter along the profile from the coastal zone to the continental slope of the Laptev Sea, using the Rock-Eval approach. We investigated surface sediment samples obtained during the Arctic marine expeditions of 2018–2019 on the R/V “Akademik Mstislav Keldysh». The most active oxidation of organic matter, exported with river runoff and products of coastal erosion, occurs in the coastal zone at a depth of several tens of meters. A significant effect on the organic matter composition is exerted by the sediment export from Novosibirsk Islands eroding coastlines. We assume that various products carried by river runoff and coastal erosion are characterized by various signatures detected by the Rock-Eval method (e.g., the OI and Tpeak values). It is also shown that the mineral matrix does not seem to provide a first-order control on preventing organic matter degradation during transport from the coastal zone to deep-sea basins. |
format |
Article in Journal/Newspaper |
author |
Elena V. Gershelis Roman S. Kashapov Alexey S. Ruban Irina A. Oberemok Andrey A. Leonov Denis V. Chernykh Oleg V. Dudarev Igor P. Semiletov |
author_facet |
Elena V. Gershelis Roman S. Kashapov Alexey S. Ruban Irina A. Oberemok Andrey A. Leonov Denis V. Chernykh Oleg V. Dudarev Igor P. Semiletov |
author_sort |
Elena V. Gershelis |
title |
IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH |
title_short |
IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH |
title_full |
IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH |
title_fullStr |
IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH |
title_full_unstemmed |
IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACH |
title_sort |
identifying sources of organic carbon in surface sediments of laptev sea shelf using a rock-eval approach |
publisher |
Tomsk Polytechnic University |
publishDate |
2020 |
url |
https://doi.org/10.18799/24131830/2020/8/2780 https://doaj.org/article/560768d22dcb40a6b732273c40a0153c |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic laptev Laptev Sea permafrost |
genre_facet |
Arctic laptev Laptev Sea permafrost |
op_source |
Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 331, Iss 8, Pp 189-198 (2020) |
op_relation |
http://izvestiya.tpu.ru/archive/article/view/2780/2296 https://doaj.org/toc/2500-1019 https://doaj.org/toc/2413-1830 doi:10.18799/24131830/2020/8/2780 2500-1019 2413-1830 https://doaj.org/article/560768d22dcb40a6b732273c40a0153c |
op_doi |
https://doi.org/10.18799/24131830/2020/8/2780 |
container_title |
Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov |
container_volume |
331 |
container_issue |
8 |
container_start_page |
189 |
op_container_end_page |
198 |
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1766325266548785152 |