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Petrology of tectonically segmented Central Indian Ridge

DRS at CSIR-National Institute of Oceanography

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Title Petrology of tectonically segmented Central Indian Ridge
 
Creator Mukhopadhyay, R.
Iyer, S.D.
 
Subject petrology
mineralogy
texture
tectonics
 
Description Distribution and mineralogy of various rock types along the 4200-km-long slow-spreading Central Indian Ridge, between Owen fracture zone in the north and Indian Ocean triple junction in the south, is studied in the light of ridge segmentation, and associated stress regime. To understand such phenomena along an extremely low magmatic budget spreading axis, rock samples from nine sites were examined. Rocks at these sites differ markedly in mineralogical composition and texture, but, surprisingly, not geochemically. Nature of segmentation of the ridge (length and offset) by transform faults appears to have influenced the variable extent of melting of the source rock and depth of magma generation below each ridge segment. We conclude that segmentation plays a significant role in facilitating polybaric fractional crystallization and the resultant mineralogical and textural variations in the erupted rocks
 
Date 2009-05-06T10:54:37Z
2009-05-06T10:54:37Z
1993
 
Type Journal Article
 
Identifier Current Science, Vol.65; 623-628p.
http://drs.nio.org/drs/handle/2264/2868
 
Language en
 
Rights Copyright [1993]. 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 Current Science Association, Bangalore, India