Record Details

Changing depositional environments during the Late Quatrnary along the western continental margin of India

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Changing depositional environments during the Late Quatrnary along the western continental margin of India
 
Creator Thamban, M.
 
Subject sediment
continental margin
stable isotope
terrigenous clays
sea level
sedimentation
core site
Oxygen Minimum Zone
 
Description Sedimentalogical and palaeoceanographic studies were carried out on two sediment cores collected within the Oxygen Minimum Zone (OMZ - between 150 to 1200 m water depth) along the western continental margin of India. The glacial to interglacial variations on a shallow core off Cochin, suggests that the average sedimentation rates were very high (~6 13.2 cm/kyr) and varied widely during the Holocene and the late Pleistocene. Grain size measurements reveal that the clay content varied with the Late Quaternary climatic changes, as inferred from the stable isotope studies. The boundary between the Stage 2 and 1 is marked by a pronounced increase in the flux to terrigenous clays and a fall in organic (C@dorg@@) and carbonate (CaCO@d3@@) content. The rapid sea level fluctuations during the deglaciation and the proximity of the core site to the continent during the lowered sea level, lead to a relatively high average sedimentation rate. Contrastingly, a core from the isolated topographic high off Goa showed relatively lower average sedimentation rates (~6 5.2 cm/kyr) during the Holocene and the late Pleistocene. The contrasting sedimentation features observed at two different locations within the same oceanographic regime underlines the fact that topographic features and proximity of the core site to the continent, controls the sedimentation rates during the late Quaternary.
 
Date 2008-02-22T05:31:31Z
2008-02-22T05:31:31Z
1998
 
Type Journal Article
 
Identifier Journal Indian Association of Sedimentologists, Vol.17(2); 147-156p.
http://drs.nio.org/drs/handle/2264/983
 
Language en
 
Rights Copyright [1998]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Indian Association of Sedimentologists