Structure and Petrography of the Quartz-Magnetite and Associated Rocks of Siddipet Area, Medak District, Andhra Pradesh

Authors

  • R. Vaidyanadhan
     Geology Department, Andhra University, Waltair
  • A. V. R. Sastry
     Geology Department, Andhra University, Waltair

Abstract

A series of detached hills composed of quartz-magnetite rocks and diabases occur in the districts of Medak, Nizamabad, Adilabad and Karimnagar of Andhra Pradesh. The country rock is granitic gneiss and is cut across by a number of dykes. The structure of these rocks near Siddipet in Medak district has been studied in detail, and a number of traverses also made between Armur and Jagtial to the north in the districts of Nizamabad and Karimnagar to infer the probable overall structure of the region.

The quartz-magnetite rocks contain quartz and magnetite only and are devoid of ferro-magnesian minerals. The diabases in the Siddipet area are divided into two groups, one rich in hornblende and the other in pyroxene on the basis of petrographic study.

From a study of the outcrop pattern of the quartz-magnetite rocks and diabase bands in the Siddipet area, three traces of axial planes of folds (FI, FII, FIII) possibly related to three ages of folding are inferred. These rocks have been faulted along N-S and NE-SW directions. From the overall pattern of outcrop of these rocks in the entire region, it is surmised that the rocks of Siddipet area form a part of a major NW plunging anticline with an overturned western limb and with the nose of the fold being near the Godavari river.

Downloads

Download data is not yet available.

Issue

Volume 13, Issue 1, March 1972

Section

Articles

Downloads

Published

1972-03-01

How to Cite

Vaidyanadhan, R., & Sastry, A. V. R. (1972). Structure and Petrography of the Quartz-Magnetite and Associated Rocks of Siddipet Area, Medak District, Andhra Pradesh. Journal of Geological Society of India, 13(1), 21–29. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/61581

References

APPAYADHANULU, K. and SETTI, D. N., (1968) Some aspects of copper mineralisation near Mailaram, Khammam district, Andhra Pradesh. Abs. Seminar on Plutonic Complexes of India, Hydrabad., pp. 72-73.

HAMZAH ALI, (1955) Unpublished report on paris of Jagtial, Sircilla and Metpalli taluks, Karimnagar district, Hyderabad State. pp. 20-21.

KRISHNAN, M. S., (1964) Iron Ores of India. Brochure of the XXII Inter. Geol. Congr., New Delhi., p. 16.

KURSHID MIRZA, (1940) A preliminary note on the Iron Ore Resources of the Hyderabad State. Bull. 4, Hyderabad Geological Series. Government Central Press, Hyderabad.

NARASIMHA RAO, CH., (1968) On some aspects of the Archaean granite complex in parts of Warangal, Karimnagar, Medak Nalgonda, Hyderabad and Mahabubnagar districts, Andhra Pradesh. Abs. Seminar on Plutonic Complexes of India, Hyderabad., pp. 20-21.

NARAYANASWAMI, S., (1966) Tectonic problems of the Precambrian rocks of Peninsular India. Symposium on 'Tectonics'. Bull. Ind. Geophy. Union, no. 3, p. 89.

ROY, B. C., (1964) General report for the year 1960-61. Rec. Geol. Sur. Ind., v. 95(1), p. 29.

SARKAR, S. N., (1968) Precambrian stratigraphy and geochronology of Peninsular India. Dhanbad Publishers, Dhanbad, India, p. 2.

SARMA, S. R., (1960) Pyroxene in Hyderabad granites. Q. J. G. M. M. Soc. Ind., v. 32(1), p. 49.

SASTRY, A. V. R., (1965) A note on the occurrence of bastite. Curr. Sci., v. 34(22), pp. 637-638.

SASTRY, A. V. R. and VAIDYANADHAN, R., (1968) Structure and petrography of the quartz-magnetite and associated rocks of Vemparala area, Nellore district, Andhra Pradesh. Jour. Geol. Soc. Ind., V. 9(1), pp. 49-57.

Most read articles by the same author(s)

<< < 1 2 3 4 5 6 > >>