Geological Features of Copper-Molybdenum Deposit in Narigongma Area of Qiangtang Basin in Qinghai-Xizang Plateau

The copper-molybdenum deposit in Narigongma area lies in the Qiangbei-Changdu block,which is in the north of Bangonghu-Nujiang suture zone and the south of Jiangshajiang suture zone.This deposit and Yulong porphyry cupric deposit belong to the same mineral belt.The cupric ore bodies generally distribute in the upper porphyry and melaphyre,and are complicated in shape and simple in mineral type.The molybdenum ore bodies mostly lie in granide,diorite and black mica granide and a few in pyrite propy litization basalt.The fluid inclusion shows that the source of impregnating copper-moly bdenum deposit is from lower crust.The composite rupture is mainly factor for controlling the mineral deposit in this area,and the copper-molybdenum depo sitlies in the crossed area of large faults.The intermediate intrusive is inner controlling factor,and the fissure tectonic system also plays the important rule for controlling minerlization.