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Rb-Sr age and Sr isotopic composition of alkaline dykes near Mumbai: Further evidence for the Deccan Trap-Reunion plume connection

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Title Rb-Sr age and Sr isotopic composition of alkaline dykes near Mumbai: Further evidence for the Deccan Trap-Reunion plume connection
 
Creator SAHU, R
KUMAR, A
SUBBARAO, KV
WALSH, JN
BISWAL, TK
 
Subject flood basalts
mantle
india
origin
mahabaleshwar
bombay
lavas
nd
 
Description We report a new Rb-Sr isochron age of 64.9 +/- 0.8 Ma for the West Coast lamprophyre at Murud, south of Mumbai and trace element and Sr isotopic composition (0.70384-0.70419) for alkaline, ultrapotassic and basic suites of dykes NE of Kalyan near Mumbai intruding the Deccan basaltic flows. The age of lamprophyre is synchronous with the bulk of the Deccan Trap activity and nearly coincides with the K/T boundary. Also, the initial Sr isotopic composition is similar to the Deccan and Reunion basalts suggesting a genetic connection to the Reunion plume.
 
Publisher GEOLOGICAL SOC INDIA
 
Date 2011-07-30T06:38:06Z
2011-12-26T12:52:42Z
2011-12-27T05:39:31Z
2011-07-30T06:38:06Z
2011-12-26T12:52:42Z
2011-12-27T05:39:31Z
2003
 
Type Article
 
Identifier JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 62(5), 641-646
0016-7622
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7874
http://hdl.handle.net/10054/7874
 
Language en