Potassium - Argon Ages of the Amritpur Granite, District Nainital, Kumaun Himalaya and its Stratigraphic Position

Authors

  • S. Varadarajan
     Department of Geology, University of Delhi, Delhi 110007

Abstract

Potassium - Argon ages of muscovite and biotite, separated from the Amritpur Granite, District Nainital, Kumaun Himalaya, determined in the 'Geochronology Laboratory' of the IGEM Institute of the USSR Academy of Sciences, Moscow, are 1880 ± 40 m.y. and 1330 ± 40 respectively. The granitic body apparently shows intrusive relationship with quartzite-metavolcanic association of the Bhimtal-Bhowali area of which the latter has given a whole rock K-Ar age of 228 ± 10. These reveal that the Amritpur Granite is composite in nature intruded in Middle Proterozoic Period (1880 ± 40 m.y.) and later remobilised at different periods with the development of tourmaline granite in the peripheral parts, as the latest phase.

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Issue

Volume 19, Issue 8, August 1978

Section

Research Notes

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Published

1978-08-01

How to Cite

Varadarajan, S. (1978). Potassium - Argon Ages of the Amritpur Granite, District Nainital, Kumaun Himalaya and its Stratigraphic Position. Journal of Geological Society of India, 19(8), 380–382. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/64380

References

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