Record Details

Clay mineral distribution on the Kerala continental shelf and slope

DRS at CSIR-National Institute of Oceanography

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Field Value
 
Title Clay mineral distribution on the Kerala continental shelf and slope
 
Creator Rao, V.P.
Nair, R.R.
Hashimi, N.H.
 
Subject Geology and Geophysics
clay minerals
continental shelves
continental slope
sediments
distribution
X ray diffraction analysis
grain size
ISW, India, Kerala
 
Description Seventy-five sediment samples collected from the Kerala continental shelf and slope during the 17th and 71st Cruises of @iRV gaveshani@@ were analysed by X-ray diffraction for clay mineral cntent. The distribution of total clay (< 4~k fraction) indicates low percentages (< 10%) on the outer shelf and high percentages on the inner shelf (20 to 50%) and upper continental slope (11 to 47%). The clay minerals are composed of montomorillonite (smectite), kaolinite, illite and gibbsite and the non clay minerals are quartz and feldspar. Kaolinite and gibbsite have low values on the outer shelf and high values on the inner shelf and slope, while illite increases in the offshore direction. However, montmorillonite behaves differently from others in having high values on the outer shelf and low values on the inner shelf and slope. These variations in the clay mineral distribution have been attributed to differences in the energy of the various environments and due to size segregation of the minerals
 
Date 1997-11-28T10:01:00Z
2017-09-29T13:48:35Z
1997-11-28T10:01:00Z
2017-09-29T13:48:35Z
1983
 
Type Journal Article
 
Identifier Journal of the Geological Society of India, vol.24; 1983; 540-546
0016-7622
http://drs.nio.org/drs/handle/2264/6509
 
Language en
 
Relation J Geol Soc India
SCI
 
Publisher Geological Society of India