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Tectono-thermal evolution of ultrahigh-temperature- (UHT-) metamorphic rocks in the Madurai Block of the Southern Granulite Terrane (southern India)

Subject Area Palaeontology
Term from 2012 to 2016
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 220402090
 
The metamorphic rocks of the Southern Indian Shield are considered as the best archive for geodynamic processes and serve as a valuable tool for the reconstruction of Precambrian crustal evolution in the Indian sub-continent. The Madurai Block constitutes part of the Southern Granulite Terrane in southern India and is made up of a variety of rock types, including mafic granulite, charnockite, sapphirine-bearing granulite, calc-granulite, quarzite, leptynite, gneisses, migmatite, etc. Of particular significance are sapphirine/kornerupine-bearing granulites because they preserve signatures of metamorphic crystallization along the prograde path through arrested textures and are thus potential tools for the derivation of the P-T trajectory of metamorphism. To date, the nature and cause of ultrahigh-temperature- (UHT-) metamorphism in the Madurai Block remain unresolved, with conflicting models of P-T paths presented in the literature. Detailed textural and petrological analyses of arrested reaction textures are planned, in combination with the modeling of pseudosections. Such an approach will yield distinct P-T segments for various evolutionary stages and will thus provide a far more complete description of the geodynamic evolution of this UHT metamorphic complex in particular and will contribute to a better understanding of UHT metamorphic complexes in general.
DFG Programme Research Grants
International Connection India
 
 

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