Sahu, Richa ; Subbarao, K. V. ; Walsh, J. N. ; Biswal, T. K. ; Kumar, Anil (2003) Rb-Sr age and Sr isotopic composition of alkaline dykes near Mumbai: further evidence for the Deccan trap-reunion plume connection Journal of the Geological Society of India, 62 (5). pp. 641-646. ISSN 0016-7622
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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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Geological Society of India. |
| Keywords: | Flood Basalts; Mantle; India; Origin; Mahabaleshwar; Bombay; Lavas; nd |
| ID Code: | 95803 |
| Deposited On: | 07 Dec 2012 09:09 |
| Last Modified: | 07 Dec 2012 09:09 |
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