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

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Mineralogy of Tin Ores from Koraput District, Orissa


Affiliations
1 Regional Research Laboratory, Bhubaneswar 751 013, India
2 Directorate of Mines, Govt. of Orissa, Bhubaneswar, India
3 Orissa Remote Sensing Application Centre, Bhubaneswar, India
     

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Tin along with Nb and Ta occurs both as primary mineral in pegmatites and as detrital mineral in the colluvial, eluvial and alluvial placers in Matili-Mundaguda area of Koraput District, Orissa. Cassiterite is commonly associated with soda plagioclase, microcline, perthite, quartz and muscovite, and it invariably contains inclusions of columbite-tantaIite, tapiolite, pyrochlore and fergusonite varying from 0.4 to 18% by volume and 3 to 400 microns in size. Minerals, like ilmenite, magnetite, lepidolite, pyrite, chalcopyrite and sphalerite are also associated with cassiterite. Nb and Ta is present in cassiterite both in solid solution as well as separate mineral phases.
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  • Mineralogy of Tin Ores from Koraput District, Orissa

Abstract Views: 182  |  PDF Views: 2

Authors

B. C. Acharya
Regional Research Laboratory, Bhubaneswar 751 013, India
S. K. Das
Regional Research Laboratory, Bhubaneswar 751 013, India
R. K. Sahoo
Regional Research Laboratory, Bhubaneswar 751 013, India
B. C. Patnaik
Directorate of Mines, Govt. of Orissa, Bhubaneswar, India
N. K. Das
Orissa Remote Sensing Application Centre, Bhubaneswar, India

Abstract


Tin along with Nb and Ta occurs both as primary mineral in pegmatites and as detrital mineral in the colluvial, eluvial and alluvial placers in Matili-Mundaguda area of Koraput District, Orissa. Cassiterite is commonly associated with soda plagioclase, microcline, perthite, quartz and muscovite, and it invariably contains inclusions of columbite-tantaIite, tapiolite, pyrochlore and fergusonite varying from 0.4 to 18% by volume and 3 to 400 microns in size. Minerals, like ilmenite, magnetite, lepidolite, pyrite, chalcopyrite and sphalerite are also associated with cassiterite. Nb and Ta is present in cassiterite both in solid solution as well as separate mineral phases.