Sarangi, S. ; Gopalan, K. ; Roy, A. B. ; Sreenivas, B. ; Das Sharma, S. (2006) Pb-Pb age of carbonates of Jhamarkotra formation: constraints on the age of Aravalli supergroup, Rajasthan Journal of the Geological Society of India, 67 (4). pp. 442-446. ISSN 0016-7622
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Abstract
Pb-Pb isochron age of carbonate rocks of the Jhamarkotra Formation of the Aravalli Supergroup from the Udaipur sector in Rajasthan has been measured for the first time as 1921±67 Ma (2s). We consider this as a reset age, as it is indistinguishable from the earlier reported Rb-Sr isochron age of 1900±80 Ma for the Darwal Granite formed synkinematically with the Aravalli deformation. The depositional age of the Jhamarkotra carbonates could be 200-300 Ma older as suggested by the positive d13C anomalies noted in these carbonate rocks.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer. |
| Keywords: | Pb-Pb Isochron Age; Carbonates; Aravalli Supergroup; Rajasthan |
| ID Code: | 89891 |
| Deposited On: | 02 May 2012 13:17 |
| Last Modified: | 11 Jul 2012 10:14 |
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