New Rb-Sr Age of Kanara Granite, South Kanara District, Karnataka State

Authors

  • M. N. Balasubrahmanyan
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta
  • P. K. Bishui
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta
  • K. C. Chandy
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta
  • S. N. Gupta
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta
  • N. K. Jana
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta
  • D. K. Paul
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta
  • R. Prasad
     Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta

Abstract

New Rb-Sr isotopic age is presented for the porphyritic phase of Kanara batholith of South Kanara, Karnataka. The porphyritic granite has a good spread of Rb/Sr ratio and indicates an isochron age of 2681 ± 236 Ma with an initial ratio of 0.7022 ± 0.004. The observed low initial Sr ratio suggests its derivation from mantle without much crustal contamination.

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Issue

Volume 23, Issue 8, August 1982

Section

Research Notes

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Published

1982-08-01

How to Cite

Balasubrahmanyan, M. N., Bishui, P. K., Chandy, K. C., Gupta, S. N., Jana, N. K., Paul, D. K., & Prasad, R. (1982). New Rb-Sr Age of Kanara Granite, South Kanara District, Karnataka State. Journal of Geological Society of India, 23(8), 402–405. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/65195

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