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Geochemistry of Precambrian metapelites from Patharkhang, West Khasi Hills district, Meghalaya, India

Author Affiliations

  • 1Department of Geological Sciences, Gauhati University, Guwahati, Assam-781 014, India
  • 2Department of Geology, Dimoria College, Khetri, Kamrup (Metro), Assam-782 403, India
  • 3Department of Geological Sciences, Gauhati University, Guwahati, Assam-781 014, India

Int. Res. J. Earth Sci., Volume 5, Issue (8), Pages 15-21, September,25 (2017)


Cordierite bearing and cordierite free garnet sillimanite gneisses constitute granulite facies metapelitic assemblages in the Gneissic Complex rocks of the Shillong Plateau in Patharkhang, West Khasi Hills district in Meghalaya. The petrographic study shows that the mineralogical developments of the metapelites are related to different metamorphic events. However, geochemical affinity of these rocks is totally unknown till date and this study reveals the results of geochemical study of the rocks. The precursors of cordierite bearing metapelites were shales with some volcanic intercalations whose compositions have been possibly modified by partial melting and metamorphic differentiation. The high average K/Rb ratios of the rocks also suggest their restitic origin after the removal of partial melts.


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