Geochronological and Geological Studies on a Granite of Higher Himalaya, Northeast of Manikaran, Himachal Pradesh

Authors

  • V. B. Bhanot
     Physics Department, Panjab University, Chandigarh
  • A. K. Bhandari
     Geological Survey of India, Sector-17, Chandigarh
  • V. P. Singh
     Physics Department, Panjab University, Chandigarh
  • Ashok K. Kansal
     Physics Department, Panjab University, Chandigarh

Abstract

Rb-Sr whole-rock data is presented for a biotite-granite of Central Crystallines. The whole-rock isochron age is found to be 467±45 m.y. This should represent the time of intrusion of the granite. A brief account of the geology and petrography is also presented. The age of the biotite is found to be 8.8±2.0 m.y., which is the youngest Rb-Sr age reported so far for a mineral from the Himalaya. This fixes the period when the rocks of this area, after being heated and uplifted, cooled to a temperature of about 300°C.

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Issue

Volume 20, Issue 2, February 1979

Section

Research Papers

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Published

1979-02-01

How to Cite

Bhanot, V. B., Bhandari, A. K., Singh, V. P., & Kansal, A. K. (1979). Geochronological and Geological Studies on a Granite of Higher Himalaya, Northeast of Manikaran, Himachal Pradesh. Journal of Geological Society of India, 20(2), 90–94. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/64591

References

BHANOT, V. B., GILL, J. S., ARORA, R. P. and BHALLA, J. K., (1974) Radiometric dating of the Dalhousie Granite. Curr. Sci., v. 43, p. 208.

BHANOT, V. B., GOEL, A. K., SINGH, VEER PAL and KWATRA, S. K., (1975) Rb-Sr radiometric studies for the Dalhousie and Rohtang Area, Himachal Pradesh. Carr. Sci., v. 44, pp. 219-220.

BHANOT, V. B., BHANDARI, A. K., SINGH, VEER PAL and KANSAL, ASHOk, K., (1976) Precambrian (1220 m.y.) Rb-Sr whole rock isochron age for Bandal granite, Kulu Himalaya, Himachal Pradesh. Abstracts, Himalayan Geology, Seminar, Delhi, held in Sept. 1976, (Proceedings under publication).

BHANOT, V. B., SINGH, VEER PAL, KANSAL, ASHOK, K. and THAKUR, VIKRAM, C., (1977) Early Proterozoic Rb-Sr whole-rock age for Central Crystalline gneiss of Higher Himalaya, Kumaon. Jour. Geol. Soc. India, v. 13, pp. 90-91.

HEIM, A. and GANSSER, A., (1939) Central Himalaya, Geological observations of the Swiss expedition. Mem. Soc. Helv. Sci. Nat., v. 73, pp. 1-245.

JAGER, E., BHANDARI, A. K. and BHANOT, V. B., (1971) Rb-Sr age determination of biotites and whole rock samples from the Mandi and Chor Granites, Himachal Pradesh, India. Eclogae Geol Helv., v. 64, pp. 521-527.

MEHTA, P. K., (1977) Rb-Sr geochronology of the Kulu-Mandi Belt: its implications for the Himalayan tectogenesis. Sond. Geol. Rundschau, v. 66, pp. 156-175.

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