Charnockites of Visakhapatnam, Andhra Pradesh

Authors

  • Department of Geology, Andhra University, Waltair 530003
  • Department of Geology, Andhra University, Waltair 530003

Abstract

The tonalitic charnockites from Visakhapatnam, Andhra Pradesh, belong to 2,600 m y. age. They were structurally emplaced along the axes of NE and E plunging overturned isoclinal synclines exhibited by khondalites. The palingenetic charnockites of granodioritic composition have indicated an age of 2,000 m.y., which corresponds to the age of NW-SE cross-folds in the Eastern Ghats of Andhra Pradesh.

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Published

1979-10-01

How to Cite

Sriramadas, A., & Rao, A. T. (1979). Charnockites of Visakhapatnam, Andhra Pradesh. Journal of Geological Society of India, 20(10), 512–517. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/64626

References

BALASUBRAHMANYAM, M. N., (1975) Significance of K-Ar age of biotite from charnockite type area, Madras. Geol. Surv. India, Misc. Pub., v. 23, Precambrian Geology of the Peninsular Shield, pt. I, pp. 233-235.

CRAWFORD, A. R., (1969) Reconnaissance Rb-Sr dating of the Precambrian rocks of southern Peninsular India. Jour. Geol. Soc. India, v. 10, pp. 117-166.

NARAYANASWAMY, S., (1975) Proposal for charnockite-khondalite system in the Archaean Shield of Peninsular India. Geol. Surv, India, Misc. Pub. v. 23. Precambrian Geology of the Peninsular Shield, pt. I, pp. 1-17.

PICHAMUTHU, C. S., (1967) The Precambrian of India (in) Geologic systems. The Precambrian, v, 3, ed. K. Rankama, Interscience, London.

RAO, A. T., (1977) Study of apatite-magnetite veins near Kasipatnam, Visakhapatnam district, Andhra Pradesh, India. Tschermaks Min. Petro Mitt., v. 23, pp. 87-103.

RAO, A. T. and BABU, V. R. R. M., (1978) Allanite from Air Port Hill charnockites, Visakhapatnam, India. Amer. Mineral, v, 63, pp, 330-331.

VINOGRADOV, A., TUGARINOV. A., ZHYKOV, c., STAPNIKOVA, N., BIBIKOVA, E. and KHORRE, K., (964) Geochronology of Indian Precambrian. Int. Geol. Congr. Rep. 22nd Session. pt. X, pp 553-567.

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