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

B. C. Acharya ¹, S. K. Das ¹, R. K. Sahoo ¹, B. C. Patnaik ², N. K. Das ³

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

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.

Full Text

     

B. C. Acharya ¹, B. C. Patnaik ¹

Affiliations
1 Regional Research Laboratory, Bhubaneswar-751013, Orissa, IN

Abstract

In the columbite-bearing pegmatite occurrences in the Eastern Ghats Complex around Talbahal - Karunapali area of Phulbani district, economic concentrations of columbite with appreciable quantities of tungsten and trace of tin are recorded in the colluvial and eluvial placers surrounding the source pegmatite.

Full Text