金堆城斑岩钼矿是东秦岭超大型钼矿带内最重要钼矿床之一，该矿床的形成与中生代花岗斑岩有关，且岩体顶部发育了典型的钾长石石英条纹岩。矿区内含脉率和裂隙发育程度可作为矿化强度的一个重要标志。成矿流体研究表明主要成矿阶段温度为２００°Ｃ±；成矿流体含盐度具有双配分模式特征，盐度介于２７５～４２５ｗ（ＮａＣｌ）ｅｑ％和０６１～１７ｗ（ＮａＣｌ）％两个区间之内；成矿流体成分以富Ｃｌ－、Ｋ＋、ＳＯ２－４、贫Ｆ－、Ｎａ＋、ＨＣＯ－３为特征。稳定同位素研究表明δ３４Ｓ‰介于１２３～４３４之间；δ１８Ｏ‰介于１１８３～８５９之间，δＤ‰介于５７２２～１２０６９之间；稳定同位素数值说明成矿热液早期以岩浆热液为主，晚期有雨水加入 The Jinduicheng porphyry molybdenum deposit is one of the most important molybdenum deposits in the ultra-large molybdenum ore belt of the East Qinling. The deposit is related to the Mesozoic granite porphyry and the top of the rock mass develops typical K-feldspar- . The rate of mineralization and the degree of fracture development can be used as an important indicator of mineralization intensity. The study of ore-forming fluid shows that the temperature of the main metallogenic stage is 200 ° C ±. The salinity of the ore-forming fluid has the characteristics of double partitioned mode with salinities of 275 ~ 425w (NaCl) eq% and 061 ~ 17w (NaCl)%. The composition of ore-forming fluid is characterized by rich Cl-, K +, SO2-4, lean F-, Na +, HCO-3. Stable isotope studies show that δ34S ‰ is between 123 ~ 434, δ18O ‰ is between 1183 ~ 859, δD ‰ is between 5722 ~ 12069, and stable isotopes The numerical results show that the early mineralization hydrothermal fluids mainly dominated by magmatic hydrothermal fluids and later rainfall was added