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Chemical Character of Detrital Garnet in Cauvery River Sediment and its Provenance, South India


Affiliations
1 Department of Geology, Anna University, Chennai-600025, Tamil Nadu, India
2 Department of Studies in Earth Sciences, University of Mysore, Mysore-570006, Karnataka, India
 

The study attempts to determine the chemical characters of detrital garnets provenance in the Cauvery River Basin. The geochemical results reveal that the detrital garnets are derived from biotite schist, charnockite, and gneisses of intermediate felsic, moderate to strong weathered provenance. The end member composition of the garnets indicates almandine species that are metamorphosed in amphibolite to granulite facies P-T conditions. The angular outline of detrital garnet in the upstream and sub-rounded to rounded grains in the downstream attribute it’s transport from the upstream of the Cauvery River.

Keywords

Detrital Garnet, Mineral Chemistry, Provenance, Cauvery River.
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  • Chemical Character of Detrital Garnet in Cauvery River Sediment and its Provenance, South India

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Authors

N. Gobala Krishnan
Department of Geology, Anna University, Chennai-600025, Tamil Nadu, India
R. Nagendra
Department of Geology, Anna University, Chennai-600025, Tamil Nadu, India
L. Elango
Department of Geology, Anna University, Chennai-600025, Tamil Nadu, India
K. N. Prakash Narasimha
Department of Studies in Earth Sciences, University of Mysore, Mysore-570006, Karnataka, India
Pradeep P. Mujumdar
Department of Studies in Earth Sciences, University of Mysore, Mysore-570006, Karnataka, India

Abstract


The study attempts to determine the chemical characters of detrital garnets provenance in the Cauvery River Basin. The geochemical results reveal that the detrital garnets are derived from biotite schist, charnockite, and gneisses of intermediate felsic, moderate to strong weathered provenance. The end member composition of the garnets indicates almandine species that are metamorphosed in amphibolite to granulite facies P-T conditions. The angular outline of detrital garnet in the upstream and sub-rounded to rounded grains in the downstream attribute it’s transport from the upstream of the Cauvery River.

Keywords


Detrital Garnet, Mineral Chemistry, Provenance, Cauvery River.

References