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Authors
Affiliations
1 Department of Geo]ogy and Geophysics, Indian Institute of Technology, Kharagpur-721302, (West Bengal), IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 5 (1991), Pagination: 504-510
Abstract
Fluorite ore has been located at the Gore and Nawadih magnetite mines, about 20 km SW of Daltonganj. Palamau district, Bihar. The fluorite-bearing parageneses include amphibole-magnetite-quartz schists. mica schists and magnetite-quartz rocks-all occurring as discontinuous bands within the Chotanagpur granite gneiss. The amphiboles include hornblende, cummingtonite and anthophyllite. Scheelite occurs as an accessory mineral with fluorite', Pegmatitic granite and tonalitic gneiss occur as tongue-like intrusives within the schists. A calcite-clinohumite-periciase (brucite)-spinel-magnetite-sphalerite paragenesis is also reported from an adjoining area at Teliaband, 14 km east from the Gore-Nawadih mines. Thermal metamorphism of the hornblende hornfels facies accompanying a high temperature Fe-F-W pneumatolysis has apparently produced the fluorite-magnetite ore.
Keywords
Fluorite, Iron-Fluorine-Tungsten Skarn, Palamau, Bihar.
