The Larong molybdenum-tungsten ore district in Zuogang County,Xizang,is home to three molybdenum-tungsten ore bodies,which occur in the monzogranite porphyry and the NW and NNW fracture zones,respectively,and the host rocks are skarn,monzogranite porphyry,cataclasite,metamorphic sandstone,quartz slate and slate.It is pointed out that the genesis of the deposit is a high-temperature hydrothermal molybdenum-tungsten deposit related to epithermal intrusive rocks.The metallogenic model is skarn-porphyry-cataclasite-meta-sandstone type.The molybdenum and tungsten resources have been estimated to be large.