Petrology of the Lenghu granite mass, northwestern Qaidam basin, China

According to the petrologic, geochemical and isotope geochemical analysis, the authors consider that the Lenghu granodiorite is a S-type granite mass occurred in Indosinian, and could be belonged to the fold-thrust igneous rock series. It supplies a petrologic evidence for Indosinian collision within the southern Qilian aulacogen.