Record Details

Physical properties of a long sediment core from the central Indian Basin

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Physical properties of a long sediment core from the central Indian Basin
 
Creator Khadge, N.H.
 
Subject sediments
sediment properties
physical properties
deposition features
geotechnology
grain size
shear strength
cores
 
Description In a 7.5 m-long box core, collected at 9 degrees S and 77 degrees E from 5400 m water depth from the Central Indian Basin, geotechnical properties clearly reflect the Plio-Pleistocene boundary. It is marked by a drastic change in the physical properties and clay mineralogy, indicating a sedimentary hiatus or a volcanic ash layer. The shear strength increases from 10 to 13 kPa at this boundary, and despite higher clay and montmorillonite contents, the water content and liquid limit decrease drastically, showing the same values (WC and LL = 94%). These indicate the highly compressed and consolidated nature of this layer, which may be due to overburden pressure of the thick sediment column. Wet-bulk density increases from 1.2 to 1.5 g/cc and porosity decreases from 87 to 71 per cent at this layer. The boundary layer is about 30 cm thick and is devoid of any radiolarian fossils, which may be attributed to either sudden climatic change or to volcanic activity, which precluded preservation of radiolarian fossils
 
Date 2009-01-12T09:18:24Z
2009-01-12T09:18:24Z
1997
 
Type Conference Article
 
Identifier Geology in South Asia - 2. Proceedings of the Second South Asia Geological Congress (GEOSAS 2), Colombo, Sri Lanka: January 19-24, 1995, Ed. by: Wijayananda, N.P.; Cooray, P.G.; Mosley, P. 191-196p.
http://drs.nio.org/drs/handle/2264/2052
 
Language en
 
Relation Geol. Surv. Mines Bureau Sri Lanka Prof. Pap.. 7
 
Rights Copyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Geological Survey and Mines Bureau, Dehiwala, Sri Lanka