• Granite-molybdenite association in Kerala in relation to taphrogenic metallogeny

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      https://www.ias.ac.in/article/fulltext/jess/092/03/0297-0310

    • Keywords

       

      Granite; molybdenite; geochemistry; fluid inclusions; continental margin; taphrogenic metallogeny

    • Abstract

       

      Two molybdenite-bearing granites from the Kerala region, namely, the Chengannoor and the Ambalavayal granites are discussed here in terms of their salient geochemical characters. The geochemistry of the host rocks indicates a peraluminous, calc-alkaline to alkali-calcic nature and the element levels show good fit with the proposed ‘finger-prints’ for granite-molybdenite systems. Fluid inclusion studies suggest that Mo was probably partitioned in vapour phase, which subsequently combined with available sulphur. Regional distribution of molybdenite strongly favours the view of a molybdenum province in the southern part of the Indian shield. Associations of rare metal mineralization with the riftcontrolled acid magmatic phase in the Kerala region are suggestive of a late Precambrian —Early Palaeozoic taphrogenic metallogeny.

    • Author Affiliations

       

      M Santosh1 N G K Nair1

      1. Centre for Earth Science Studies, P.B. No. 2235, Trivandrum - 695 010, India
    • Dates

       
  • Journal of Earth System Science | News

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