Soney Kurien, P; Dr.Nambiar,C G(Cochin University Of Science And Technology, May 2, 2000)
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Abstract:
This report deals essentially with the geochemistry and petrogenesis
of Perinthatta anorthosite. The work also addresses the geological setting
of the pluton in terms of its field relationships and petrography and the
structure and metamorphism of the region and examines its relation with
the associated plutons. For the sake of convenience, the thesis is divided
into six chapters
Description:
Department of Marine Geology and Geophysics, School of Marine Sciences, Cochin
University of Science and Technology
Baiju,K R; Nambiar,C G(Cochin University of Science and Technology, September , 2006)
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Abstract:
The present research is aimed at studying the charnockites and associated rocks of the Madurai Granulite Block (MGB), especially in terms of their field settings, texture, mineralogy, and mineral chemistry analyzing their petrogenesis with the help of thermobarometrical studies and geochronological constraints. The mechanism of charnockitization by the influx of CO2 rich fluids and its relation to the graphite mineralization is actually a matter of discussion and study. The objectives of the present study are, to delineate petrological and structural relationship of charnockites and associated gneissic rocks, to study the field and petrogenetic aspects of graphite mineralization in the MGB, to establish and re-evaluate the P-T conditions of formation of the rocks with the aid of thermbarometric computations and to compare with the earlier studies, characterization of graphite with XRD, Raman spectroscopy and isotope studies together with a search in to its genesis and its relation to the high-grade metamorphism of the terrain, to evaluate the role of CO2 bearing fluids in the processes of charnockitization as well as in the genesis of graphite within the high-grade terrain and to delineate the metamorphic geochronology of selected rocks using ‘monazite dating’ technique with EPMA.