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

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Geochemistry and Petrogenesis of Pyrophyllite Deposit of Madrangjodi, Keonjhar District, Orissa


Affiliations
1 Department of Geology, Utkal University, Bhubaneswar - 751 004, India
2 Institute of Minerals and Materials Technology, Bhubaneswar - 751 013, India
3 Department of Geology, Ravenshaw University, Cuttack - 753 003, India
     

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Pyrophyllite deposit at Madrangjodi is a large lensoidal massif overlain unconformably by Dhanjori quartzite and underlain by the parent Singhbhum granite (Phase - II). Pyrophyllite and quartz are the major minerals with minor to trace amounts of muscovite, chloritoid opaques and tourmaline. It is broadly divisible into lamellar, granular and schistose varieties. SiO2 (66.90-74.36 %) and Al2O3 (20.80-27.54 %) are the major oxides. The major elements data indicate its derivation from Singhbhum granite with depletion of SiO2 and increment of Al2O3. Trace and REE data are discussed to corroborate its genesis.

Keywords

Pyrophyllite, Hydrothermal Alteration, Madrangjodi, Orissa.
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  • Geochemistry and Petrogenesis of Pyrophyllite Deposit of Madrangjodi, Keonjhar District, Orissa

Abstract Views: 256  |  PDF Views: 0

Authors

M. Das
Department of Geology, Utkal University, Bhubaneswar - 751 004, India
S. M. Monalisa
Department of Geology, Utkal University, Bhubaneswar - 751 004, India
A. K. Paul
Department of Geology, Utkal University, Bhubaneswar - 751 004, India
R. K. Mishra
Department of Geology, Utkal University, Bhubaneswar - 751 004, India
J. K. Mohanty
Institute of Minerals and Materials Technology, Bhubaneswar - 751 013, India
A. A. Pradhan
Department of Geology, Utkal University, Bhubaneswar - 751 004, India
S. Goswami
Department of Geology, Ravenshaw University, Cuttack - 753 003, India

Abstract


Pyrophyllite deposit at Madrangjodi is a large lensoidal massif overlain unconformably by Dhanjori quartzite and underlain by the parent Singhbhum granite (Phase - II). Pyrophyllite and quartz are the major minerals with minor to trace amounts of muscovite, chloritoid opaques and tourmaline. It is broadly divisible into lamellar, granular and schistose varieties. SiO2 (66.90-74.36 %) and Al2O3 (20.80-27.54 %) are the major oxides. The major elements data indicate its derivation from Singhbhum granite with depletion of SiO2 and increment of Al2O3. Trace and REE data are discussed to corroborate its genesis.

Keywords


Pyrophyllite, Hydrothermal Alteration, Madrangjodi, Orissa.

References