Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

D. Rajasekhara Reddy ¹

Affiliations
1 Geology Department Andhra University Visakhapatnam - 530 003, IN

Abstract

No Abstract.

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S. C. Patel ¹, A. V. Subrahmanyam ², T. Desapathi ², M. Nageswara Rao ², Y. V. Rathaiah ², V. Anil Kumar ², D. Rajasekhara Reddy ³, Malathi Vemuri ³

Affiliations
1 Department of Earth Sciences, IIT, Powai, Mumbai - 400 076, IN
2 Atomic Mineral Directorate for Exploration and Research, Begumpet, Hyderabad - 560 016, IN
3 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN

Abstract

No Abstract.

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D. Rajasekhara Reddy ¹

Affiliations
1 Geology Department,Andhra University, Visakhapatnam -530 003, IN

Abstract

No Abstract.

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D. Rajasekhara Reddy ¹, V. S. S. Prasad ¹, V. Malathi ¹, K. S. N. Reddy ¹, D. D. Varma ¹

Affiliations
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN

Abstract

The economic potentiality of the heavy minerals in the beaches between Baruva and Bavanapadu extending for about 45 km was examined. In the sub-surface sediments, the heavy minerals were studied at an interval of 1 m up to a maximum depth of 5.8m. In general the concentration of heavy minerals is high in dunes followed by backshore and foreshore regions. Heavy mineral content increases from surface to sub-surface in dunes, decreases in foreshore and does not vary much in backshore. The heavy minerals include mainly ilmenite, garnet, sillimanite and ortho-pyroxenes with minor amounts of amphiboles, zircon, monazite, rutile etc. Majority of the heavies such as ilmenite, monazite, zircon etc. are concentrated in finer fractions while some of the heavies like garnet and sillimanite are concentrated in coarser fractions. The inferred reserves estimated for the area indicate its economical potential.

Keywords

Heavy Minerals, Dunes, Backshore, Foreshore, Economic Potential.

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D. Rajasekhara Reddy ¹

Affiliations
1 Delta Studies Institute, Andhra University, Visakhapatnam, IN

Abstract

No Abstract.

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D. Rajasekhara Reddy ¹, Malathi Vemuri ¹

Affiliations
1 Department of Geology, Andhra University, Visakhapatnam - 530 003, IN

Abstract

The heavy mineral assemblage in the nearshore sediments of north coastal Andhra Pradesh includes ilmenite, garnet, sillimanite, monazite, zircon, pyroxenes etc., and is derived from Eastern Ghat Group comprising dominantly khondalites and charnockites. The assemblage also consists of minor to accessory amounts of kyanite that has not been reported so far from the Eastern Ghat Group. Kyanite bearing rocks are reported from the Archaean schists of the Khammam District of Andhra Pradesh along the Godavari drainage basin.. The evidences available so far suggest that the rocks from Godavari drainage.basin are the sources for kyanite. However, further work is needed to confirm whether these rocks in the Godavari drainage basin or hitherto unreported kyanite bearing rocks in the other drainage basins constitute the provenance.

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