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

Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/7874

Title:	Rb-Sr age and Sr isotopic composition of alkaline dykes near Mumbai: Further evidence for the Deccan Trap-Reunion plume connection
Authors:	SAHU, R KUMAR, A SUBBARAO, KV WALSH, JN BISWAL, TK
Keywords:	flood basalts mantle india origin mahabaleshwar bombay lavas nd
Issue Date:	2003
Publisher:	GEOLOGICAL SOC INDIA
Citation:	JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 62(5), 641-646
Abstract:	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.
URI:	http://dspace.library.iitb.ac.in/xmlui/handle/10054/7874 http://hdl.handle.net/10054/7874
ISSN:	0016-7622
Appears in Collections:	Article

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