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Field geology, petrography, and orthopyroxene clusters of the Dhule-Parola dike, Tapi valley, central Deccan basalt province

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Title Field geology, petrography, and orthopyroxene clusters of the Dhule-Parola dike, Tapi valley, central Deccan basalt province
 
Creator KESHAV, S
SHETH, HC
CHANDRASEKHARAM, D
 
Description The > 40 km-long, E-W-trending Dhule-Parola multiple dike masks the southern limit of the Tapi rift, It is made up mainly of an aphyric and a plagioclase (pl)-phyric dike, with large loose boulders of dioritic gabbros, Unlike a previous report, we have found no clearcut basement xenoliths in it, In the pl-phyric dike; the groundmass plagioclases are more calcic (An(89-92)) than the phenocrysts (An(82-85)). This unusual phenomenon indicates contamination or magma mixing, An interesting observation is the presence of orthopyroxene clusters in the pl-phyric dike, Each of these clusters comprises hundreds of microscopic, individual orthopyroxene crystals, Except from Shir-pur, in the same general area as that of the present study, the development of such puzzling clusters is not yet reported from basalts of the entire Deccan province.
 
Publisher CURRENT SCIENCE ASSN
 
Date 2011-07-21T06:17:35Z
2011-12-26T12:51:55Z
2011-12-27T05:38:42Z
2011-07-21T06:17:35Z
2011-12-26T12:51:55Z
2011-12-27T05:38:42Z
1998
 
Type Article
 
Identifier CURRENT SCIENCE, 74(3), 252-254
0011-3891
http://dspace.library.iitb.ac.in/xmlui/handle/10054/5809
http://hdl.handle.net/10054/5809
 
Language en