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...

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Published in:Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov
Main Authors: Elena V. Gershelis, Roman S. Kashapov, Alexey S. Ruban, Irina A. Oberemok, Andrey A. Leonov, Denis V. Chernykh, Oleg V. Dudarev, Igor P. Semiletov
Format: Article in Journal/Newspaper
Language:Russian
Published: Tomsk Polytechnic University 2020
Subjects:
Online Access:https://doi.org/10.18799/24131830/2020/8/2780
https://doaj.org/article/560768d22dcb40a6b732273c40a0153c
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spelling 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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