The petrology of the volcanic rocks in Tengchong, Yunnan

The volcanic terrains in Tengchong, Yunnan are famous Cenozoic volcanic terrains in China. The (examination) of the petrography shows that the volcanic terrains in Tengchong are typical of the basalt-(andesite)-(dacite) arc volcanic rock associations of the calc-alkaline series. These volcanic rocks were erupted during the late Pliocene to late Pleistocene when the Tengchong region was developed into a continental intraplate environment. The Tengchong arc volcanic rocks were formed at least at 60 Ma in response to the termination of the subduction in this area.