Porphyrytype copper ore (associated with molybdenum ore) is the dominant ore in Gangdese metallogenic belt, which is widely concerned as the typical of exclusion epicontinental magmatic arc—collision rift belt porphyry mineralization. However, it has not been attached importance to the exploring and researches about skarntype tungsten—copper—molybdenum ore and porphyrytype independent molybdenum. Especially the discovery of ledge skarn type scheelite ore fills in the mineral gaps in the ore field; and the discovery of concealed porphyrytype molybdenum minerals in the border of Yarlung Zangbo suture zone breaks traditional erroneous zone of the understanding of exclusion epicontinental mineralization. Tungsten—copper—molybdenum ore, discovered by our bureau in Zedang orefield, eastern Gangdese Arc, is not only a large base to explore and exploit tungsten—copper—molybdenum deposits, but also a group of tungsten—copper—molybdenum deposits (short for Zedang orefield) affected by epicontinental strike slip rift mineralization system. At the early stage(68～40.3Ma), under the epicontinental strike slip rift effects of NWW trending Yarlung Zangbo suture zone, the formation of skarntype tungsten—copper—molybdenum mineralization was controlled by riftfault transfer zone——NEE trending striping faultage; while at the later stage(30.26～23.62 Ma), under the epicontinental strike-slip rift effects of NEE trending Chongmuda, the formation of concealed porphyrytype molybdenum minerals was controlled by pushclose transfer zone——NWW trending thrust faultage. The formation and change of skarntype deposit completed in 86～68 Ma and 57～40.3 Ma, respectively, and they enriched in porphyrytype deposit in 30.26～23.62 Ma.