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Pre- and post-monsoonal changes in grain size and heavy minerals in the sediments from Kalbadevi Bay, Ratnagiri, west coast of India

DRS at CSIR-National Institute of Oceanography

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Title Pre- and post-monsoonal changes in grain size and heavy minerals in the sediments from Kalbadevi Bay, Ratnagiri, west coast of India
 
Creator Valsangkar, A.B.
Fernandes, D.
 
Subject heavy minerals
grain size
seasonal variations
sediments
 
Description Sediments from the Kalbadevi Bay, Ratnagiri collected during January, May and October have been studied for processes responsible for the observed grain size variations and heavy mineral distribution. The study shows transportation of loose sand fractions from shallow depth (less than 5 m) during the SW monsoon and deposition in deeper depths (more than 10 m) during post-monsoon. It is further inferred that the E-W trending depression in the central part of the Bay partially controls the sand distribution. Clay accumulation in the Bay begins after the culmination of monsoonal effects. Distribution of ilmenite appears similar to that of magnetite. Pre- and post- monsoonal changes in the distribution pattern of heavy minerals show that fine to very fine particles (< 62.5 mu) of magnetite and ilmenite have maximum concentration (14 to 26% and 14 to 29% respectively) in the month of October (post-monsoon). This may be due influence of strong currents in the Bay after the culmination of SW monsoon.
 
Date 2012-01-03T04:55:26Z
2012-01-03T04:55:26Z
2011
 
Type Journal Article
 
Identifier Indian Journal of Geo-Marine Sciences, vol.40(5); 2011; 657-663
http://drs.nio.org/drs/handle/2264/3977
 
Language en
 
Rights © IJMS/NISCAIR 2010. CC Attribution 3.0 License
 
Publisher NISCAIR (CSIR)