Detriral flux of sediment cores in the southeast Indian Ocean
Because of a close relationship between detrital flux variations and magnetic susceptibility (MS) flux (MS cm**3 of bulk sediment multiplied by the linear sedimentation rate) variations in the southeast Indian basin of the southern ocean, MS flux profiles have been used to examine the spatial and te...
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1994
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.733896 2023-05-15T13:42:09+02:00 Detriral flux of sediment cores in the southeast Indian Ocean Bareille, Gilles F Grousset, Francis E Labracherie, Monique Labeyrie, Laurent D Petit, Jean-Robert MEDIAN LATITUDE: -50.766892 * MEDIAN LONGITUDE: 95.116254 * SOUTH-BOUND LATITUDE: -64.664333 * WEST-BOUND LONGITUDE: 51.550000 * NORTH-BOUND LATITUDE: -43.520000 * EAST-BOUND LONGITUDE: 145.292667 * DATE/TIME START: 1967-04-18T00:00:00 * DATE/TIME END: 1988-02-01T00:00:00 1994-02-17 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.733896 https://doi.org/10.1594/PANGAEA.733896 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.733896 https://doi.org/10.1594/PANGAEA.733896 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bareille, Gilles F; Grousset, Francis E; Labracherie, Monique; Labeyrie, Laurent D; Petit, Jean-Robert (1994): Origin of detrital fluxes in the southeast Indian Ocean during the last climatic cycles. Paleoceanography, 9(6), 799-820, https://doi.org/10.1029/94PA01946 APSARA2 APSARA4 KERSIMAG Marion Dufresne (1972) MD38 MD84-551 MD88-769 MD88-770 MD88-772 MD88-787 MD88-791 MD91-972 PC Piston corer RC11 RC1112 RC11-120 Robert Conrad South Indian Ocean South Pacific Dataset 1994 ftpangaea https://doi.org/10.1594/PANGAEA.733896 https://doi.org/10.1029/94PA01946 2023-01-20T07:31:39Z Because of a close relationship between detrital flux variations and magnetic susceptibility (MS) flux (MS cm**3 of bulk sediment multiplied by the linear sedimentation rate) variations in the southeast Indian basin of the southern ocean, MS flux profiles have been used to examine the spatial and temporal detrital flux changes in this basin during the last climatic cycle. Results indicate a general increase in detrital material input during the coldest periods, suggesting a widespread phenomenon, at least on the basin scale. Mineralogical data, geochemical data, and 87Sr/86Sr isotopic ratios have been used to determine the origin and transport mechanisms responsible for increased detrital flux during glacial periods. Mineralogical and geochemical data show that these glacial 'highs' are due to increases in both Kerguelen-Crozet volcanic and Antarctic detrital inputs. The 87Sr/86Sr isotopic composition of the >45-µm fraction indicates that the Kerguelen-Crozet province contributes to at least 50% of the coarse particule input to the west. This contribution decreases eastward to reach less than 10%. These tracers clearly indicate that the Crozet-Kerguelen province was a major source region of detrital in the western part of the basin during glacial times. In contrast, material of Antarctic origin is well represented in the whole basin (fine and coarse fractions). Because of the minor amount of coarse particles in the sediments, volcanic particles from Kerguelen and crustal particles from Antarctica have most probably been transported by the Antarctic bottom water current and/or the Circumpolar deepwater current during glacial periods as is the case today. Nevertheless, the presence of coarse particles even in low amount suggests also a transport by ice rafting (sea-ice and icebergs), originated from both Kerguelen and Antarctic sources. However, the relative importance of both hydrographic and ice-rafting modes of transport cannot be identified accurately with our data. During low sea level stands (glacial ... Dataset Antarc* Antarctic Antarctica Iceberg* Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Indian Kerguelen Pacific Southern Ocean The Antarctic ENVELOPE(51.550000,145.292667,-43.520000,-64.664333) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
APSARA2 APSARA4 KERSIMAG Marion Dufresne (1972) MD38 MD84-551 MD88-769 MD88-770 MD88-772 MD88-787 MD88-791 MD91-972 PC Piston corer RC11 RC1112 RC11-120 Robert Conrad South Indian Ocean South Pacific |
spellingShingle |
APSARA2 APSARA4 KERSIMAG Marion Dufresne (1972) MD38 MD84-551 MD88-769 MD88-770 MD88-772 MD88-787 MD88-791 MD91-972 PC Piston corer RC11 RC1112 RC11-120 Robert Conrad South Indian Ocean South Pacific Bareille, Gilles F Grousset, Francis E Labracherie, Monique Labeyrie, Laurent D Petit, Jean-Robert Detriral flux of sediment cores in the southeast Indian Ocean |
topic_facet |
APSARA2 APSARA4 KERSIMAG Marion Dufresne (1972) MD38 MD84-551 MD88-769 MD88-770 MD88-772 MD88-787 MD88-791 MD91-972 PC Piston corer RC11 RC1112 RC11-120 Robert Conrad South Indian Ocean South Pacific |
description |
Because of a close relationship between detrital flux variations and magnetic susceptibility (MS) flux (MS cm**3 of bulk sediment multiplied by the linear sedimentation rate) variations in the southeast Indian basin of the southern ocean, MS flux profiles have been used to examine the spatial and temporal detrital flux changes in this basin during the last climatic cycle. Results indicate a general increase in detrital material input during the coldest periods, suggesting a widespread phenomenon, at least on the basin scale. Mineralogical data, geochemical data, and 87Sr/86Sr isotopic ratios have been used to determine the origin and transport mechanisms responsible for increased detrital flux during glacial periods. Mineralogical and geochemical data show that these glacial 'highs' are due to increases in both Kerguelen-Crozet volcanic and Antarctic detrital inputs. The 87Sr/86Sr isotopic composition of the >45-µm fraction indicates that the Kerguelen-Crozet province contributes to at least 50% of the coarse particule input to the west. This contribution decreases eastward to reach less than 10%. These tracers clearly indicate that the Crozet-Kerguelen province was a major source region of detrital in the western part of the basin during glacial times. In contrast, material of Antarctic origin is well represented in the whole basin (fine and coarse fractions). Because of the minor amount of coarse particles in the sediments, volcanic particles from Kerguelen and crustal particles from Antarctica have most probably been transported by the Antarctic bottom water current and/or the Circumpolar deepwater current during glacial periods as is the case today. Nevertheless, the presence of coarse particles even in low amount suggests also a transport by ice rafting (sea-ice and icebergs), originated from both Kerguelen and Antarctic sources. However, the relative importance of both hydrographic and ice-rafting modes of transport cannot be identified accurately with our data. During low sea level stands (glacial ... |
format |
Dataset |
author |
Bareille, Gilles F Grousset, Francis E Labracherie, Monique Labeyrie, Laurent D Petit, Jean-Robert |
author_facet |
Bareille, Gilles F Grousset, Francis E Labracherie, Monique Labeyrie, Laurent D Petit, Jean-Robert |
author_sort |
Bareille, Gilles F |
title |
Detriral flux of sediment cores in the southeast Indian Ocean |
title_short |
Detriral flux of sediment cores in the southeast Indian Ocean |
title_full |
Detriral flux of sediment cores in the southeast Indian Ocean |
title_fullStr |
Detriral flux of sediment cores in the southeast Indian Ocean |
title_full_unstemmed |
Detriral flux of sediment cores in the southeast Indian Ocean |
title_sort |
detriral flux of sediment cores in the southeast indian ocean |
publisher |
PANGAEA |
publishDate |
1994 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.733896 https://doi.org/10.1594/PANGAEA.733896 |
op_coverage |
MEDIAN LATITUDE: -50.766892 * MEDIAN LONGITUDE: 95.116254 * SOUTH-BOUND LATITUDE: -64.664333 * WEST-BOUND LONGITUDE: 51.550000 * NORTH-BOUND LATITUDE: -43.520000 * EAST-BOUND LONGITUDE: 145.292667 * DATE/TIME START: 1967-04-18T00:00:00 * DATE/TIME END: 1988-02-01T00:00:00 |
long_lat |
ENVELOPE(51.550000,145.292667,-43.520000,-64.664333) |
geographic |
Antarctic Indian Kerguelen Pacific Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Kerguelen Pacific Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Iceberg* Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Iceberg* Sea ice Southern Ocean |
op_source |
Supplement to: Bareille, Gilles F; Grousset, Francis E; Labracherie, Monique; Labeyrie, Laurent D; Petit, Jean-Robert (1994): Origin of detrital fluxes in the southeast Indian Ocean during the last climatic cycles. Paleoceanography, 9(6), 799-820, https://doi.org/10.1029/94PA01946 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.733896 https://doi.org/10.1594/PANGAEA.733896 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.733896 https://doi.org/10.1029/94PA01946 |
_version_ |
1766163676329410560 |