Rb-Sr age of Godhra and related granites, Gujarat, India

Gopalan, K. ; Trivedi, J. R. ; Merh, S. S. ; Patel, P. P. ; Patel, S. G. (1979) Rb-Sr age of Godhra and related granites, Gujarat, India Proceedings of the Indian Academy of Sciences - Earth and Planetary Sciences, 88 (1). pp. 7-17. ISSN 0253-4126

PDF - Publisher Version

Official URL: http://www.ias.ac.in/j_archive/epsci/88/1/1-17/vie...


Rubidium and strontium determinations are reported for Godhra and geographically related granites from central Gujarat. The whole rock data define a Rb-Sr isochron corresponding to a common age of 955±20 m.y. and initial Sr ratio of 0.7130±0.001. This age is distinctly older than the age of 735 m.y. reported for the Erinpura suite of rocks from Mount Abu in western Rajasthan and from Idar in northern Gujarat. There are at least two generations of post-Delhi intrusive rocks in the Gujarat precambrian. Biotites associated with these granites have the same age as the whole-rocks within experimental error indicating the absence of significant metamorphic heating since the time of emplacement. It is significant that rocks of similar age occur in the Rajasthan Precambrian mainly in the axial zone of the Aravalli Mountains.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
ID Code:13531
Deposited On:12 Nov 2010 15:32
Last Modified:16 May 2016 22:41

Repository Staff Only: item control page