Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications
Changes in the terrigenous sediment source and transport mechanisms during the late Quaternary have been investigated using four sediment cores within the Indian sector of Southern Ocean, using the magnetic susceptibility (MS) and sedimentological records. Sediments deposited during the Holocene and...
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ftindinstgeomagn:oai:localhost:123456789/327 2023-05-15T14:04:08+02:00 Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications Thamban, M. Naik, S.S. Mohan, R. Rajakumar, A. Basavaiah, N. D’Souza, Witty Kerkar, Sarita Subramaniam, M.M. Sudhakar, M. Pandey, P.C. 2005 http://14.139.123.141:8080/jspui/handle/123456789/327 en eng Magnetic susceptibility Terrigenous flux Late Quaternary Southern ocean Palaeoceanographic Article 2005 ftindinstgeomagn 2019-11-26T08:39:15Z Changes in the terrigenous sediment source and transport mechanisms during the late Quaternary have been investigated using four sediment cores within the Indian sector of Southern Ocean, using the magnetic susceptibility (MS) and sedimentological records. Sediments deposited during the Holocene and other interglacial periods were characterised by low MS, low sand content, reduced ice-rafted detritus (IRD) input and increased illite possibly transported via hydrographic advection from the south. The glacial intervals are characterised by high MS, high sand content, increased IRD input and reduced illite clays, derived from both local as well as Antarctic sources. Significant reduction in clay fraction and illite content during glacials suggests that the erosive and transporting capabilities of the deep and bottom waters could have reduced compared to the interglacial times. The changes in terrigenous influx to this region were significantly influenced by the rhythmic glacial-interglacial fluctuations in bottom circulation and the position of the Polar Front. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Indian Institute of Geomagnetism (IIG): Repository Antarctic Indian Southern Ocean |
institution |
Open Polar |
collection |
Indian Institute of Geomagnetism (IIG): Repository |
op_collection_id |
ftindinstgeomagn |
language |
English |
topic |
Magnetic susceptibility Terrigenous flux Late Quaternary Southern ocean Palaeoceanographic |
spellingShingle |
Magnetic susceptibility Terrigenous flux Late Quaternary Southern ocean Palaeoceanographic Thamban, M. Naik, S.S. Mohan, R. Rajakumar, A. Basavaiah, N. D’Souza, Witty Kerkar, Sarita Subramaniam, M.M. Sudhakar, M. Pandey, P.C. Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications |
topic_facet |
Magnetic susceptibility Terrigenous flux Late Quaternary Southern ocean Palaeoceanographic |
description |
Changes in the terrigenous sediment source and transport mechanisms during the late Quaternary have been investigated using four sediment cores within the Indian sector of Southern Ocean, using the magnetic susceptibility (MS) and sedimentological records. Sediments deposited during the Holocene and other interglacial periods were characterised by low MS, low sand content, reduced ice-rafted detritus (IRD) input and increased illite possibly transported via hydrographic advection from the south. The glacial intervals are characterised by high MS, high sand content, increased IRD input and reduced illite clays, derived from both local as well as Antarctic sources. Significant reduction in clay fraction and illite content during glacials suggests that the erosive and transporting capabilities of the deep and bottom waters could have reduced compared to the interglacial times. The changes in terrigenous influx to this region were significantly influenced by the rhythmic glacial-interglacial fluctuations in bottom circulation and the position of the Polar Front. |
format |
Article in Journal/Newspaper |
author |
Thamban, M. Naik, S.S. Mohan, R. Rajakumar, A. Basavaiah, N. D’Souza, Witty Kerkar, Sarita Subramaniam, M.M. Sudhakar, M. Pandey, P.C. |
author_facet |
Thamban, M. Naik, S.S. Mohan, R. Rajakumar, A. Basavaiah, N. D’Souza, Witty Kerkar, Sarita Subramaniam, M.M. Sudhakar, M. Pandey, P.C. |
author_sort |
Thamban, M. |
title |
Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications |
title_short |
Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications |
title_full |
Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications |
title_fullStr |
Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications |
title_full_unstemmed |
Changes in the source and transport mechanism of terrigenous input to the Indian sector of Southern Ocean during the late Quaternary and its palaeoceanographic implications |
title_sort |
changes in the source and transport mechanism of terrigenous input to the indian sector of southern ocean during the late quaternary and its palaeoceanographic implications |
publishDate |
2005 |
url |
http://14.139.123.141:8080/jspui/handle/123456789/327 |
geographic |
Antarctic Indian Southern Ocean |
geographic_facet |
Antarctic Indian Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
_version_ |
1766275140474109952 |