Abstract

"Wall rock alteration studies in four structurally controlled, epigenetic metalliferous belts in India indicate that the process, by the successive influx of solutions of varying composition, rich in metals, nonmetals, and volatiles, extended over a wide range of conditions, viz. from upper amphibolite to greenschist facies. The initial non-productive phase is followed by the main, extensive, and predominant Fe-Mg (K) phase . . . with which the sulfide deposition is characteristically associated. Sulfides are succeeded by non-productive sericitization, carbonatization, etc."

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