Rb-Sr Age Determinations for the Mount Abu Granite and Related Rocks of Gujarat

Authors

  • A. R. Crawford
     Research School of Earth Sciences, Australian National University, Canberra

Abstract

The mount Abu Granite of south-western Rajasthan and related 'Erinpura type' granites in Gujarat give Rb-Sr total rock ages of about 735 m.y. They are therefore of the same age as the Malani Igneous Suite of western and south-western Rajasthan and not older as previously believed. Though possibly updated by re-heating related to emplacement of that Suite, it seems more probable that the two were emplaced at about the same time. This could have taken place in a tectonic environment created by sinistral shear of what are now northern and southern Peninsular India along the Narmada-Son lineament, with bending of the southern end of a rectilinear Aravalli orogenic belt by major fault drag.

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Issue

Volume 16, Issue 1, March 1975

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Articles

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Published

1975-03-01

How to Cite

Crawford, A. R. (1975). Rb-Sr Age Determinations for the Mount Abu Granite and Related Rocks of Gujarat. Journal of Geological Society of India, 16(1), 20–28. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/63449

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