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We report picritic porphyrites from the Jianchuan area in western Yunnan, within the Sanjiang–Tethyan Tectonic Domain (STTD), forming part of the the southeastern segment of the East Tethyan tectonic domain, east of the Himalayan–Tibetan Orogen. Feldspar 40 Ar 39 Ar plateau ages from the porphyrites range from 201.7Ma to 190.6Ma. Geochemically, the picritic porphyrites are characterized...
The late Carboniferous to Permian is a critical period for final amalgamation of the Central Asian Orogenic Belt (CAOB), which is characterized by voluminous igneous rocks, particularly granitoids. The Kekesai composite granitoid porphyry intrusion, situated in the Chinese western Tianshan (southwest part of CAOB) includes two intrusive phases, a monzogranite phase, intruded by a granodiorite phase...
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