Supracrustal Rocks of Bundelkhand Massif, India
su/31860661
Автор: M. M. Singh
Язык: Английский
Издательство: LAP Lambert Academic Publishing
Год: 2015
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Описание:
The Bundelkhand massif represents one of the oldest nuclei of the northern part of the Indian Peninsula, which comprises extensive outcrop of gneisses and granitoids in association with meta-sedimentaries and meta-volcanics of older supracrustal mass. High-grade metamorphic rocks viz. TTG, gneisses and amphibolites were formed during the first episode of metamorphism during 3200Ma and grouped under Older Metamorphic Group (OMG). The low-grade metamorphic rocks such as mafics and ultramafics, meta-sedimentaries and metavolcanosedimentaries have been grouped under Newer Metamorphic Group (NMG), second episode of Metamorphism probably during 3200-2600Ma. These metamorphic rocks are further intruded by the different episodes of granites (2500-2300), quartz reefs (2300-2000 Ma) and mafic dykes (2000-1800 Ma).