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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Tomsk Polytechnic University
2020-08-01
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Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
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Online Access: | http://izvestiya.tpu.ru/archive/article/view/2780/2296 |
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doaj-560768d22dcb40a6b732273c40a0153c2021-01-19T06:58:10ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302020-08-01331818919810.18799/24131830/2020/8/2780IDENTIFYING SOURCES OF ORGANIC CARBON IN SURFACE SEDIMENTS OF LAPTEV SEA SHELF USING A ROCK-EVAL APPROACHElena V. Gershelis0Roman S. Kashapov1Alexey S. Ruban2Irina A. Oberemok3 Andrey A. Leonov4Denis V. Chernykh5Oleg V. Dudarev6Igor P. Semiletov7National Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic University; Institute of High Current Electronics SB RASPacific Oceanological Institute, Russian Academy of SciencesPacific Oceanological Institute, Russian Academy of SciencesPacific Oceanological Institute, Russian Academy of Sciences; National Research Tomsk Polytechnic UniversityAn 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.http://izvestiya.tpu.ru/archive/article/view/2780/2296pyrolysisbottom sedimentsorganic matterhydrocarbonsarcticlaptev sea |
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DOAJ |
language |
Russian |
format |
Article |
sources |
DOAJ |
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 |
spellingShingle |
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 Известия Томского политехнического университета: Инжиниринг георесурсов pyrolysis bottom sediments organic matter hydrocarbons arctic laptev sea |
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 |
series |
Известия Томского политехнического университета: Инжиниринг георесурсов |
issn |
2500-1019 2413-1830 |
publishDate |
2020-08-01 |
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. |
topic |
pyrolysis bottom sediments organic matter hydrocarbons arctic laptev sea |
url |
http://izvestiya.tpu.ru/archive/article/view/2780/2296 |
work_keys_str_mv |
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