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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

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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, Anil B.
Fernandes, Domnica
 
Subject Heavy minerals
Grain size
Offshore
Environment
Placers
 
Description 657-663
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 (< 5 m) during the SW monsoon and deposition in deeper depths (>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 ยต) 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 2011-11-18T04:24:12Z
2011-11-18T04:24:12Z
2011-10
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/13077
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(5) [October 2011]