Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica
The palaeoceanographic studies are largely limited by poor carbonate preservation in high-latitude regions. To improve our knowledge in this key area, we studied a sediment core (ANT32-RA05C) in terms of paleomagnetic and 230 Th dating and geochemical properties, collected from the continental slope...
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Online Access: | http://dx.doi.org/10.3389/feart.2022.863336 https://www.frontiersin.org/articles/10.3389/feart.2022.863336/full |
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crfrontiers:10.3389/feart.2022.863336 2024-03-03T08:39:01+00:00 Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica Li, Guogang Bu, Ruyuan Yi, Liang Hu, Bangqi Li, Yunhai Ji, Youjun Li, Yixin Wang, Liang Chinese Arctic and Antarctic Administration 2022 http://dx.doi.org/10.3389/feart.2022.863336 https://www.frontiersin.org/articles/10.3389/feart.2022.863336/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science volume 10 ISSN 2296-6463 General Earth and Planetary Sciences journal-article 2022 crfrontiers https://doi.org/10.3389/feart.2022.863336 2024-02-03T23:16:25Z The palaeoceanographic studies are largely limited by poor carbonate preservation in high-latitude regions. To improve our knowledge in this key area, we studied a sediment core (ANT32-RA05C) in terms of paleomagnetic and 230 Th dating and geochemical properties, collected from the continental slope of the Ross Sea, Antarctica. The two major results are as follows: 1 ) the sedimentation rate based on 230 Th isotopes is 1.37 cm/kyr, agreeing well with the correlation of the relative paleomagnetic intensity of the core ANT32-RA05C to changes in Earth’s magnetic intensity and 2 ) the sediments contain ice-rafted debris (IRD) over 30%, with a considerable contribution of siliceous deposits. Integrating geochronological and geochemical properties of the studied core, a correlation of the regional paleoenvironmental process to the EPICA Dome C (EDC) Antarctic temperature is established, inferring that the IRD input and primary productivity are both enhanced in a warm climate. Moreover, a leading phase of biogenic processes to changes in the ice sheet in the Ross Ice Shelf is observed, highlighting a dominant role of the oceanic circulation in the ice-sheet retreat during the last deglaciation. Overall, the sedimentary record in the Ross Sea documents some key features of the paleoenvironmental processes in the Late Pleistocene, which could be correlated with large-scale changes in Antarctica and thus are worthy of further investigation in the future. Article in Journal/Newspaper Antarc* Antarctic Antarctica EPICA Ice Sheet Ice Shelf Ross Ice Shelf Ross Sea Frontiers (Publisher) Antarctic Ross Sea Ross Ice Shelf Frontiers in Earth Science 10 |
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topic |
General Earth and Planetary Sciences |
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General Earth and Planetary Sciences Li, Guogang Bu, Ruyuan Yi, Liang Hu, Bangqi Li, Yunhai Ji, Youjun Li, Yixin Wang, Liang Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica |
topic_facet |
General Earth and Planetary Sciences |
description |
The palaeoceanographic studies are largely limited by poor carbonate preservation in high-latitude regions. To improve our knowledge in this key area, we studied a sediment core (ANT32-RA05C) in terms of paleomagnetic and 230 Th dating and geochemical properties, collected from the continental slope of the Ross Sea, Antarctica. The two major results are as follows: 1 ) the sedimentation rate based on 230 Th isotopes is 1.37 cm/kyr, agreeing well with the correlation of the relative paleomagnetic intensity of the core ANT32-RA05C to changes in Earth’s magnetic intensity and 2 ) the sediments contain ice-rafted debris (IRD) over 30%, with a considerable contribution of siliceous deposits. Integrating geochronological and geochemical properties of the studied core, a correlation of the regional paleoenvironmental process to the EPICA Dome C (EDC) Antarctic temperature is established, inferring that the IRD input and primary productivity are both enhanced in a warm climate. Moreover, a leading phase of biogenic processes to changes in the ice sheet in the Ross Ice Shelf is observed, highlighting a dominant role of the oceanic circulation in the ice-sheet retreat during the last deglaciation. Overall, the sedimentary record in the Ross Sea documents some key features of the paleoenvironmental processes in the Late Pleistocene, which could be correlated with large-scale changes in Antarctica and thus are worthy of further investigation in the future. |
author2 |
Chinese Arctic and Antarctic Administration |
format |
Article in Journal/Newspaper |
author |
Li, Guogang Bu, Ruyuan Yi, Liang Hu, Bangqi Li, Yunhai Ji, Youjun Li, Yixin Wang, Liang |
author_facet |
Li, Guogang Bu, Ruyuan Yi, Liang Hu, Bangqi Li, Yunhai Ji, Youjun Li, Yixin Wang, Liang |
author_sort |
Li, Guogang |
title |
Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica |
title_short |
Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica |
title_full |
Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica |
title_fullStr |
Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica |
title_full_unstemmed |
Geochronology and Paleoenvironmental Changes of Late Pleistocene Sediments in the Ross Sea, Antarctica |
title_sort |
geochronology and paleoenvironmental changes of late pleistocene sediments in the ross sea, antarctica |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/feart.2022.863336 https://www.frontiersin.org/articles/10.3389/feart.2022.863336/full |
geographic |
Antarctic Ross Sea Ross Ice Shelf |
geographic_facet |
Antarctic Ross Sea Ross Ice Shelf |
genre |
Antarc* Antarctic Antarctica EPICA Ice Sheet Ice Shelf Ross Ice Shelf Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica EPICA Ice Sheet Ice Shelf Ross Ice Shelf Ross Sea |
op_source |
Frontiers in Earth Science volume 10 ISSN 2296-6463 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2022.863336 |
container_title |
Frontiers in Earth Science |
container_volume |
10 |
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1792494433290158080 |