Record Details

Clay mineral distribution on tropical shelf: an example from the western shelf of India

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Clay mineral distribution on tropical shelf: an example from the western shelf of India
 
Creator Hashimi, N.H.
Nair, R.R.
 
Subject Geology and Geophysics
grain size
x-ray diffraction analysis
distribution
sediments
continental slope
continental shelves
clay minerals
ISW, India, Kerala
 
Description Seventy-five sediment samples collected from the Kerala continental shelf and slope during the 17th and 71st Cruises of RV Gaveshani were analysed by X-ray diffraction for clay mineral content. The distribution of total clay ( 4 mu 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 montmorillonite (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 1995-12-15T10:01:55Z
2017-09-30T01:29:54Z
1995-12-15T10:01:55Z
2017-09-30T01:29:54Z
1989
 
Type Journal Article
 
Identifier Journal of Indian Association of Sedimentologists, vol.8; 1989; 17-27
0970-3268
http://drs.nio.org/drs/handle/2264/7163
 
Language en
 
Relation J Indian Assoc Sedimentol
Proc. 5 Convention; 1985
NON-SCI
 
Publisher Indian Association of Sedimentology