• Vesuvianite–wollastonite–grossular-bearing calc-silicate rock near Tatapani, Surguja district, Chhattisgarh

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      https://www.ias.ac.in/article/fulltext/jess/116/02/0143-0147

    • Keywords

       

      Vesuvianite; wollastonite; grossular; diopside; calc-silicate rock.

    • Abstract

       

      This paper reports the occurrence of vesuvianite + wollastonite + grossular + diopside + microcline + quartz assemblage in an enclave of calc-silicate rocks occurring within quartzofeldspathic gneiss near Tatapani in the western part of Chhotanagpur Gneissic Complex. The enclave contains phlogopite-absent and phlogopite-bearing calc-silicate rocks, the latter being much more abundant than the former. The above assemblage occurs in the phlogopite-absent rock. Phlogopite-bearing rock contains the assemblage phlogopite + salite + microcline + plagioclase + quartz. A strong schistosity is developed in both the calc-silicate rocks and the minerals are syntectonic with the major foliation-forming event in the area. The vesuvianite-bearing assemblage is formed by amphibolite facies regional metamorphism of a calcareous protolith at pressure > 4 kbar and $X_{CO_2}$ (fluid) > 0.15.

    • Author Affiliations

       

      S C Patel1

      1. Department of Earth Sciences, Indian Institute of Technology, Bombay, Mumbai 400 076, India.
    • Dates

       
  • Journal of Earth System Science | News

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