Late holocene sedimentation in active geological structures of the Chukchi Sea
The article presents the detailed analysis results considering bottom sediments from the Chukchi Sea. Two core samples, b16 and НС–8 were taken from the northern Herald Canyon 150 km northeast from NE Wrangel Island. Core b16 has been studied in more detail. According to the 210 Pb measurements, the...
Published in: | Geodynamics & Tectonophysics |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | Russian |
Published: |
Russian Academy of Sciences
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5800/GT-2018-9-1-0345 |
id |
fteawag:oai:dora:eawag_17206 |
---|---|
record_format |
openpolar |
spelling |
fteawag:oai:dora:eawag_17206 2023-05-15T13:57:41+02:00 Late holocene sedimentation in active geological structures of the Chukchi Sea Kalugin, I.A. Vologina, E.G. Dar’in, A.V. Astakhov, A.S. Sturm, M. Chernyaeva, G.P. Kulagina, N.V. Kolesnik, A.N. 2018 https://doi.org/10.5800/GT-2018-9-1-0345 rus rus Russian Academy of Sciences Geodynamics & Tectonophysics--Geodynamics & Tectonophysics--2078-502X--journals:4850-- eawag:17206 e-issn: 2078-502X journal id: journals:4850 issn: doi:10.5800/GT-2018-9-1-0345 uri: ut: 000431950100011 scopus: 2-s2.0-85048867124 pmid: local: Chukchi Sea bottom sediments recent sedimentation rate elemental composition diatoms pollen climate reconstruction Journal Article Text 2018 fteawag https://doi.org/10.5800/GT-2018-9-1-0345 2023-04-09T04:46:18Z The article presents the detailed analysis results considering bottom sediments from the Chukchi Sea. Two core samples, b16 and НС–8 were taken from the northern Herald Canyon 150 km northeast from NE Wrangel Island. Core b16 has been studied in more detail. According to the 210 Pb measurements, the recent sedimentation rate amounts to 0.9 mm/y – 1 at the sampling point. In the bottom layer of the core sample, the minimum concentrations of biogenic components (SiO 2bio , C org , N tot , and Br) and the increased concentrations of cold-water diatom species Thalassiosira antarctica may result from low biological productivity during the Maunder Minimum. A correlation with recent global warming (11–22 years) is shown by the increased concentrations of SiO 2bio , C org , N tot , and Br and the decreased values of magnetic susceptibility and X-ray density in the top layer (1–2 cm) of the same core sample. The results of our geochemical and diatom analysis support the available literature data and confirm that the Late Holocene sedimentation in the Chukchi Sea takes place in the zone wherein the water transits from the Pacific to the Arctic Ocean. Представлены результаты комплексного исследования вещественного состава донных осадков, вскрытых двумя кернами в северной части каньона Геральд Чукотского моря. Одна из полученных колонок была выбрана для более детального исследования. Скорость современного осадконакопления в точке отбора этого керна, измеренная по 210 Pb, составляет 0.9 мм/год. Минимальные концентрации биогенных компонентов (SiO 2биог. , С орг. , N общ., Br) и увеличение содержаний холодноводного вида диатомей Thalassiosira antarctica в нижнем слое колонки, вероятно, объясняются низкой биологической продуктивностью во время минимума Маундера. Повышенные концентрации SiO 2биог , С орг , N общ , Br, пониженные значения магнитной восприимчивости и рентгеновской плотности в самом верхнем интервале разреза (до 1–2 см) соответствуют последним 11–22 годам глобального потепления климата. Результаты геохимического и ... Article in Journal/Newspaper Antarc* Antarctica Arctic Arctic Ocean Chukchi Chukchi Sea Global warming Magnetic susceptibility Wrangel Island DORA Eawag Arctic Arctic Ocean Chukchi Sea Pacific Wrangel Island ENVELOPE(-179.385,-179.385,71.244,71.244) Geodynamics & Tectonophysics 9 1 199 219 |
institution |
Open Polar |
collection |
DORA Eawag |
op_collection_id |
fteawag |
language |
Russian |
topic |
Chukchi Sea bottom sediments recent sedimentation rate elemental composition diatoms pollen climate reconstruction |
spellingShingle |
Chukchi Sea bottom sediments recent sedimentation rate elemental composition diatoms pollen climate reconstruction Kalugin, I.A. Vologina, E.G. Dar’in, A.V. Astakhov, A.S. Sturm, M. Chernyaeva, G.P. Kulagina, N.V. Kolesnik, A.N. Late holocene sedimentation in active geological structures of the Chukchi Sea |
topic_facet |
Chukchi Sea bottom sediments recent sedimentation rate elemental composition diatoms pollen climate reconstruction |
description |
The article presents the detailed analysis results considering bottom sediments from the Chukchi Sea. Two core samples, b16 and НС–8 were taken from the northern Herald Canyon 150 km northeast from NE Wrangel Island. Core b16 has been studied in more detail. According to the 210 Pb measurements, the recent sedimentation rate amounts to 0.9 mm/y – 1 at the sampling point. In the bottom layer of the core sample, the minimum concentrations of biogenic components (SiO 2bio , C org , N tot , and Br) and the increased concentrations of cold-water diatom species Thalassiosira antarctica may result from low biological productivity during the Maunder Minimum. A correlation with recent global warming (11–22 years) is shown by the increased concentrations of SiO 2bio , C org , N tot , and Br and the decreased values of magnetic susceptibility and X-ray density in the top layer (1–2 cm) of the same core sample. The results of our geochemical and diatom analysis support the available literature data and confirm that the Late Holocene sedimentation in the Chukchi Sea takes place in the zone wherein the water transits from the Pacific to the Arctic Ocean. Представлены результаты комплексного исследования вещественного состава донных осадков, вскрытых двумя кернами в северной части каньона Геральд Чукотского моря. Одна из полученных колонок была выбрана для более детального исследования. Скорость современного осадконакопления в точке отбора этого керна, измеренная по 210 Pb, составляет 0.9 мм/год. Минимальные концентрации биогенных компонентов (SiO 2биог. , С орг. , N общ., Br) и увеличение содержаний холодноводного вида диатомей Thalassiosira antarctica в нижнем слое колонки, вероятно, объясняются низкой биологической продуктивностью во время минимума Маундера. Повышенные концентрации SiO 2биог , С орг , N общ , Br, пониженные значения магнитной восприимчивости и рентгеновской плотности в самом верхнем интервале разреза (до 1–2 см) соответствуют последним 11–22 годам глобального потепления климата. Результаты геохимического и ... |
format |
Article in Journal/Newspaper |
author |
Kalugin, I.A. Vologina, E.G. Dar’in, A.V. Astakhov, A.S. Sturm, M. Chernyaeva, G.P. Kulagina, N.V. Kolesnik, A.N. |
author_facet |
Kalugin, I.A. Vologina, E.G. Dar’in, A.V. Astakhov, A.S. Sturm, M. Chernyaeva, G.P. Kulagina, N.V. Kolesnik, A.N. |
author_sort |
Kalugin, I.A. |
title |
Late holocene sedimentation in active geological structures of the Chukchi Sea |
title_short |
Late holocene sedimentation in active geological structures of the Chukchi Sea |
title_full |
Late holocene sedimentation in active geological structures of the Chukchi Sea |
title_fullStr |
Late holocene sedimentation in active geological structures of the Chukchi Sea |
title_full_unstemmed |
Late holocene sedimentation in active geological structures of the Chukchi Sea |
title_sort |
late holocene sedimentation in active geological structures of the chukchi sea |
publisher |
Russian Academy of Sciences |
publishDate |
2018 |
url |
https://doi.org/10.5800/GT-2018-9-1-0345 |
long_lat |
ENVELOPE(-179.385,-179.385,71.244,71.244) |
geographic |
Arctic Arctic Ocean Chukchi Sea Pacific Wrangel Island |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Pacific Wrangel Island |
genre |
Antarc* Antarctica Arctic Arctic Ocean Chukchi Chukchi Sea Global warming Magnetic susceptibility Wrangel Island |
genre_facet |
Antarc* Antarctica Arctic Arctic Ocean Chukchi Chukchi Sea Global warming Magnetic susceptibility Wrangel Island |
op_relation |
Geodynamics & Tectonophysics--Geodynamics & Tectonophysics--2078-502X--journals:4850-- eawag:17206 e-issn: 2078-502X journal id: journals:4850 issn: doi:10.5800/GT-2018-9-1-0345 uri: ut: 000431950100011 scopus: 2-s2.0-85048867124 pmid: local: |
op_doi |
https://doi.org/10.5800/GT-2018-9-1-0345 |
container_title |
Geodynamics & Tectonophysics |
container_volume |
9 |
container_issue |
1 |
container_start_page |
199 |
op_container_end_page |
219 |
_version_ |
1766265497486098432 |