Age of Allanite from Kabbaldurga Quarry, Karnataka

Authors

  • Edward S. Grew
     Institut fur Mineralogie, Ruhr-Universitat, Postfach 102148, D-4630 Bochum 1, F.R.G.
  • William I. Manton
     Geosciences Program, P.O. Box 688, University of Texas - Dallas, Richardson, Texas 75080

Abstract

Allanite from a pegmatitic veinlet cutting an amphibolite lens in Peninsular gneiss at Kabbaldurga Quarry yields the following ages (in million of years): 207Pb/235U-2507, 206Pb/238U-2520, and 208Pb/Th-2887. The U-Pb ages date the high-grade metamorphism and emplacement of the Closepet granite at Kabbaldurga at close to 2500 million years ago.

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Issue

Volume 25, Issue 3, March 1984

Section

Research Notes

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Published

1984-03-01

How to Cite

Grew, E. S., & Manton, W. I. (1984). Age of Allanite from Kabbaldurga Quarry, Karnataka. Journal of Geological Society of India, 25(3), 193–195. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/65425