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

K. C. Sahoo ¹, A. K. Mathur ¹

Affiliations
1 Geological Survey of India, Jhalana Dungri, Jaipur, IN

Abstract

The occurrence of BIF from a part of Banded Gneissic Complex of Rajasthan is reported. Older than 3.0 Ga granites, their field-setting and petrochemical characters are comparable to the BIF of older supracrustals of south India (Sargur Group).

Keywords

Banded Iron-Formation, Banded Gneissic Complex, Rajasthan.

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Utpal Bose ¹, A. K. Mathur ¹, K. C. Sahoo ², S. Bhattacharya ¹, Krishan Dutt ¹, V. Aneel Kumar ³, S. S. Sarkar ¹, S. Chowdhury ¹, I. Chowdhury ¹

Affiliations
1 Geological Survey of India, Jhalana Dungri, Jaipur - 302 004, IN
2 Geological Survey of India, Bhubaneswar - 751 012, IN
3 Geological Survey of India, Hyderabad - 500 660, IN

Abstract

The oldest cratonic nucleus pf the Western Indian shield, familiarly known as the Banded Gneissic Complex (BGC), occupies a large tract in the Mcwar plains of South Rajasthan. It has essentially an old gneissic component (3.3 Ga) and a host of mafic bodies associated with detrital and chemogenic sediments which have been subjected to multiple phases of anatexis and granite intrusions (2.9 Ga and later events). The emplacement of Berach granite and succeeding dolerite dyke swarms mark the end-Archaean cratonization process. This also initiated intracratonic and cratonmarginal basin formation.

Later magmatism, especially along the basement-cover interface. is due to local remobilisation of the basement at the time of Proterozoic orogeny.

Keywords

Banded Gneissic Complex, Stratigraphy, Petrochemistry, Rajasthan.

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M. Mohanty ¹, K. C. Sahoo ¹

Affiliations
1 Geological Survey of India Operation Orissa Nayapalli , Unit-8 Bhubaneswar - 751 012, IN

Abstract

No Abstract.

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M. Mohanty , K. C. Sahoo

Abstract

No Abstract.

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