Rb-Sr whole-Rock Isochron Age of Early Proterozoic Potassic Granite from Dharmawaram, Karimnagar District, Andhra Pradesh

Authors

  • Yamuna Singh
     Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begump et, Hyderabad - 5000 16
  • K. D. P. Singh
     Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begump et, Hyderabad - 5000 16
  • R. N. Prasad
     Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Begump et, Hyderabad - 5000 16

Abstract

Whole-rock Rb-Sr isochron dating of pink potassic (av.5% K2O) granite from Dharmawaram, Karimnagar district, Andhra Pradesh, defines an isochron corresponding to an age of 2237±46 Ma with initial 87Sr/86Sr ratio of 0.71052±0.00084. The data suggest possible emplacement of potassic granite of Dharmawaram during early Proterozoic at ca. 2237 Ma. Further, high initial 87Sr/86Sr isotopic ratio of granite also indicates involvement of silicic crustal material in its genesis.

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Issue

Volume 64 , Issue 1 , July 2004

Section

Short Communications

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Published

2004-07-01

How to Cite

Singh, Y., Singh, K. D. P., & Prasad, R. N. (2004). Rb-Sr whole-Rock Isochron Age of Early Proterozoic Potassic Granite from Dharmawaram, Karimnagar District, Andhra Pradesh. Journal of Geological Society of India, 64(1), 93–96. Retrieved from https://www.geosocindia.com/index.php/jgsi/article/view/83558

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