摘要: The Caledonian granitebelt in the West Kunlun Mts.is distributed on the south-side of Kudi tectonic belt innorthwest Tibet Plateau.It consists of about 10 representative massifs in studiedarea.They were systematically studied,especially on west-side of Datong and Wuyitakemassifs that were in lower degree of study before our work. Four tectonic genesis types——oceanridge granites, volcanic arc granites, post-collision uplift granites and late-orogenicgranites have been discriminated according to their features of occurrences,rockassemblage,facieology and petrogeochemistry.The results indicate that the West KunlunMts.is a Caledonian collision-orogenic belt and it has important significance forunderstanding the geological evolution of Tibet Plateau in early Paleozoic era.