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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Indian Academy of Sciences
2005
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ftindianacasci:oai:repository.ias.ac.in:94407 2023-05-15T13:59:04+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. 2005-10 application/pdf http://repository.ias.ac.in/94407/ http://repository.ias.ac.in/94407/1/changes.pdf http://www.ias.ac.in/jess/oct2005/esb0504.pdf unknown Indian Academy of Sciences http://repository.ias.ac.in/94407/1/changes.pdf 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) 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 Journal of Earth System Science, 114 (5). pp. 443-452. ISSN 0253-4126 QE Geology Article PeerReviewed 2005 ftindianacasci 2013-01-20T13:47:34Z 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 Academy of Sciences: Publication of Fellows Antarctic Southern Ocean Indian |
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Open Polar |
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Indian Academy of Sciences: Publication of Fellows |
op_collection_id |
ftindianacasci |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology 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 |
QE Geology |
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 |
publisher |
Indian Academy of Sciences |
publishDate |
2005 |
url |
http://repository.ias.ac.in/94407/ http://repository.ias.ac.in/94407/1/changes.pdf http://www.ias.ac.in/jess/oct2005/esb0504.pdf |
geographic |
Antarctic Southern Ocean Indian |
geographic_facet |
Antarctic Southern Ocean Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://repository.ias.ac.in/94407/1/changes.pdf 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) 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 Journal of Earth System Science, 114 (5). pp. 443-452. ISSN 0253-4126 |
_version_ |
1766267434817290240 |