Geology, geochemistry and geochronology of the Archaean Peninsular Gneiss around Gorur, Hassan District, Karnataka, India
Abstract
The Peninsular Gneiss around Gorur in the Dharwar craton, reported to be one of the oldest gneisses, shows nealy E-W striking gneissosity parallel to the axial planes of a set of isoclinal folds (DhF1). These have been over printed by near-coaxial open folding (DhF12) and non-coaxial upright folding on almost N-S trend (DhF2). This structural sequence is remarkably similar to that in the Holenarasipur schist belt bordering the gneisses as well as in the surpracrustal enclaves within the gneisses, suggesting that the Peninsular Gneiss has evolved by migmatization synkinematically with DhF1 deformation.
- Publication:
-
Indian Academy of Sciences Proceedings: Earth and Planetary Sciences
- Pub Date:
- December 1991
- DOI:
- 10.1007/BF02839259
- Bibcode:
- 1991InEPS.100..399R
- Keywords:
-
- Geochemistry;
- Geochronology;
- Geology;
- Gneiss;
- Aluminum Oxides;
- Chemical Composition;
- India;
- Silicon Oxides;
- Archaean;
- trondhjemites;
- geochemistry;
- Rb-Sr geochronology;
- Peninsular gneiss;
- syntectonic emplacement;
- evolution of continental crust