Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula
The article provides new data about characteristics of the organic matter and mineralogical composition of the Cape Muostakh sediments related to intense permafrost degradation (thermoerosion processes). The sedimentary material has been investigated by X-ray diffraction, GC-MS, IRM-GC-MS, pyrolysis...
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ftmdpi:oai:mdpi.com:/2076-3263/11/2/83/ 2023-08-20T04:07:09+02:00 Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula Andrey A. Grinko Ivan V. Goncharov Nikolay V. Oblasov Elena V. Gershelis Michail V. Shaldybin Natalia E. Shakhova Alexey G. Zarubin Alexey S. Ruban Oleg V. Dudarev Maxim A. Veklich Alexey K. Mazurov Igor P. Semiletov agris 2021-02-12 application/pdf https://doi.org/10.3390/geosciences11020083 EN eng Multidisciplinary Digital Publishing Institute Geochemistry https://dx.doi.org/10.3390/geosciences11020083 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 11; Issue 2; Pages: 83 Laptev Sea Cape Muostakh Yedoma erosion thermoabrasion organic matter Text 2021 ftmdpi https://doi.org/10.3390/geosciences11020083 2023-08-01T01:03:47Z The article provides new data about characteristics of the organic matter and mineralogical composition of the Cape Muostakh sediments related to intense permafrost degradation (thermoerosion processes). The sedimentary material has been investigated by X-ray diffraction, GC-MS, IRM-GC-MS, pyrolysis–gas chromatography–mass spectrometry (Py–GC–MS), and Rock-Eval pyrolysis. Variable distribution of the total organic carbon content over the coast cliff is established. The minimum content of the organic carbon occurs at the cliff level of 5 m above sea level, and the maximum is located on the top of the cape cliff. The practical absence of unsaturated compounds indicates the intense destruction of the ice complex deposits that occurred at the level of 5 m of the Cape Muostakh cliff. The minimum organic carbon, aliphatic compounds, and the increase of the δ13C indicates the loss of hydrogen-enriched organic matter, while condensed carbon structures remain in sediment. Aromatic compounds of both plant and petroleum origin were identified in all sediments, except in the sediment sample collected at the cliff level of 5 m. Unsaturated fatty acids were detected only in the sediments of the upper cliff levels. The novel hopenes and hopane were detected and they predominantly occur in the upper layers of the cape cliff. Text Ice laptev Laptev Sea permafrost MDPI Open Access Publishing Laptev Sea Geosciences 11 2 83 |
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Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Laptev Sea Cape Muostakh Yedoma erosion thermoabrasion organic matter |
spellingShingle |
Laptev Sea Cape Muostakh Yedoma erosion thermoabrasion organic matter Andrey A. Grinko Ivan V. Goncharov Nikolay V. Oblasov Elena V. Gershelis Michail V. Shaldybin Natalia E. Shakhova Alexey G. Zarubin Alexey S. Ruban Oleg V. Dudarev Maxim A. Veklich Alexey K. Mazurov Igor P. Semiletov Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula |
topic_facet |
Laptev Sea Cape Muostakh Yedoma erosion thermoabrasion organic matter |
description |
The article provides new data about characteristics of the organic matter and mineralogical composition of the Cape Muostakh sediments related to intense permafrost degradation (thermoerosion processes). The sedimentary material has been investigated by X-ray diffraction, GC-MS, IRM-GC-MS, pyrolysis–gas chromatography–mass spectrometry (Py–GC–MS), and Rock-Eval pyrolysis. Variable distribution of the total organic carbon content over the coast cliff is established. The minimum content of the organic carbon occurs at the cliff level of 5 m above sea level, and the maximum is located on the top of the cape cliff. The practical absence of unsaturated compounds indicates the intense destruction of the ice complex deposits that occurred at the level of 5 m of the Cape Muostakh cliff. The minimum organic carbon, aliphatic compounds, and the increase of the δ13C indicates the loss of hydrogen-enriched organic matter, while condensed carbon structures remain in sediment. Aromatic compounds of both plant and petroleum origin were identified in all sediments, except in the sediment sample collected at the cliff level of 5 m. Unsaturated fatty acids were detected only in the sediments of the upper cliff levels. The novel hopenes and hopane were detected and they predominantly occur in the upper layers of the cape cliff. |
format |
Text |
author |
Andrey A. Grinko Ivan V. Goncharov Nikolay V. Oblasov Elena V. Gershelis Michail V. Shaldybin Natalia E. Shakhova Alexey G. Zarubin Alexey S. Ruban Oleg V. Dudarev Maxim A. Veklich Alexey K. Mazurov Igor P. Semiletov |
author_facet |
Andrey A. Grinko Ivan V. Goncharov Nikolay V. Oblasov Elena V. Gershelis Michail V. Shaldybin Natalia E. Shakhova Alexey G. Zarubin Alexey S. Ruban Oleg V. Dudarev Maxim A. Veklich Alexey K. Mazurov Igor P. Semiletov |
author_sort |
Andrey A. Grinko |
title |
Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula |
title_short |
Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula |
title_full |
Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula |
title_fullStr |
Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula |
title_full_unstemmed |
Characterization of Organic Matter of the Laptev Sea Eroded Coastal Sediments: A Case Study from the Cape Muostakh, Bykovsky Peninsula |
title_sort |
characterization of organic matter of the laptev sea eroded coastal sediments: a case study from the cape muostakh, bykovsky peninsula |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/geosciences11020083 |
op_coverage |
agris |
geographic |
Laptev Sea |
geographic_facet |
Laptev Sea |
genre |
Ice laptev Laptev Sea permafrost |
genre_facet |
Ice laptev Laptev Sea permafrost |
op_source |
Geosciences; Volume 11; Issue 2; Pages: 83 |
op_relation |
Geochemistry https://dx.doi.org/10.3390/geosciences11020083 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/geosciences11020083 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
2 |
container_start_page |
83 |
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1774718603458772992 |