Galena, sphalerite and pyrite at Zawar mine [India] are essentially localized in Aravalli (Archaean?) dolomites and the deposit is a typical two-dimensional, strata-bound type. Wide range of trace elements in sulphides is probably more consistent with the igneous hydrothermal (epigenetic) origin for the ores, particularly in view of high concentrations of Ag and Sb in galena, Mn in sphalerite and high Co:Ni ratio and abundance of Co to Ni in pyrite. To find a compromise between pure epigenetic and syngenetic hypotheses, a theory of submarine-hydrothermal (exhalative-sedimentary) origin for galena, blende and pyrite has been postulated.

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