小柳沟铜钨多金属矿床赋存于长城系朱龙关群下岩组上岩段及上岩组中下岩段， 容矿岩石为碳酸盐岩及火山岩， 该矿床是以Ｗ 为主的超大型多金属矿床。矿体受岩性、断裂及隐伏岩体的接触带控制，根据矿石矿物石英包裹体测得的均一温度、成矿流体的盐度、成矿流体的密度、成矿压力、ｐＨ 值、δ１８Ｏ、δ１８Ｏ （Ｈ２Ｏ）、Ｄ （Ｈ２） 的特征，表明成矿溶液既不是纯岩浆水，也不是海水， 而是大气地表水与地层中的建造水或重熔花岗岩岩浆水的混合流体。推测该矿床可能为火山喷发沉积－ 后期岩浆热液叠加改造型矿床， 朱龙关群下岩组上岩段及上岩组中、下岩段可能是其矿源层。隐伏岩体不仅为成矿提供了热源， 而且也提供了丰富的成矿物质来源 The Xiaoliuougou Cu-W polymetallic deposit occurs in the upper and lower rocks of Lower Shihuo Formation in the Great Wall and Jurassic rocks, and the host rocks are carbonate rocks and volcanic rocks. The deposits are mainly W Very large polymetallic deposit. According to the contact zone between lithology, fault and concealed rock body, the ore body is controlled by the contact temperature of ore body, the homogenization temperature, the salinity of ore fluid, the density of ore-forming fluid, metallogenetic pressure, pH value, δ18O, (H2O) and D (H2), indicating that the ore-forming solution is neither pure magma nor seawater, but a mixed fluid of atmospheric surface water and formation water in the strata or remelted granite magmatic water. It is presumed that the deposit may be a volcanic eruption-late magmatic hydrothermal superposition and alteration deposit, and that the upper and lower rocks in the lower member and the upper member in the Xiaolonguan Formation may be their source rocks. Hidden rock not only provides a source of heat for mineralization, but also provides a rich source of mineralization