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The Archaean Napier Complex consists of felsic orthogneiss, mafic granulite and a variety of paragneisses metamorphosed in the granulite facies, in part at ultrahigh-temperature (UHT, >900 o C). Orthopyroxene-bearing felsic orthogneiss of tonalitic-granodioritic composition, the highly recrystallized Archaean tonalite-trondhjemite-granodiorite (TTG) crust, is a major constituent of the...
Extensive field work in the Eastern Dharwar Craton, associated with petrographic and geochemical (major and trace elements) investigations, allows four main types of Late Archaean granitoids to be distinguished. (1) Na-rich granitoids of trondhjemitic, tonalitic and granodioritic composition (TTG) that are characterised by strongly fractionated REE patterns and low HREE contents and generally interpreted...
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