Open Access Digital Repository of Ministry of Earth Sciences, Government of India

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 and Naik, SS and Mohan, R and Rajakumar, A and Basavaiah, N and D'Souza, W and Kerkar, S and Subramaniam, MM and Sudhakar, M and Pandey, PC (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.

[img]
Preview
PDF
Changes in the source.pdf - Published Version

Download (640kB) | Preview

Abstract

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.

Item Type: Article
Additional Information: Copyrights to this article belongs to Springer.
Uncontrolled Keywords: Magnetic susceptibility;terrigenous flux;late Quaternary Southern Ocean
Subjects: Geosciences (General)
Depositing User: NCAOR Library
Date Deposited: 13 Jun 2014 10:01
Last Modified: 13 Jun 2014 10:05
URI: http://moeseprints.incois.gov.in/id/eprint/565

Actions (login required)

View Item View Item