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夹皮沟金矿北西向剪切带存在着长英质和镁铁质两类糜棱岩系列岩石，韧性变形中伴随的大量流体与糜棱岩之间发生了强烈的水岩反应：斜长石绢云母化和钠化，暗色矿物绿泥石化，以及大范围强烈的碳酸盐化。韧性剪切变形为一近等体积过程（ｆｖ≈１）．随韧性剪切作用增强，两类糜棱岩系列岩石中ＳｉＯ２均带出，而ＣＯ２和Ｈ２Ｏ等挥发分及Ａｕ、Ｓ等成矿元素明显富集。释放出的ＳｉＯ２呈胶体态赋存在流体中，并吸附Ａｕ等成矿物质，后在脆性构造中重结晶为含金石英脉。流体包裹体研究显示成矿流体主要由大气降水组成，其温度、压力和盐度分别为２４５～２９２℃、９５．４～１３１．７ＭＰａ和１２．８８～１６．３３ｗｔ％ＮａＣｌ。
The northwest shear zone of the Jiapigou gold deposit exists two series of mylonite rocks, feldspathic and mafic. Strong water-rock reactions occur between a large number of fluids associated with the ductile deformation and mylonites: Sericite and sodium, dark mineral chlorites, and a wide range of intense carbonation. Ductile shear deformation of a nearly equal volume process (fv ≈ 1). With the increase of ductile shearing, SiO2 in both types of mylonite rocks are brought out, while the volatile components such as CO2 and H2O and the mineral elements Au and S are obviously enriched. The release of SiO2 was colloidal present in the fluid, and adsorption of Au and other metallogenic materials, and then recrystallized in the brittle structure of auriferous quartz veins. Fluid inclusions studies show that the ore-forming fluid is mainly composed of atmospheric precipitation, and its temperature, pressure and salinity are 245 ~ 292 ℃, 95.4 ~ 131.7MPa and 12.88 ~ 16.33wt% NaCl, respectively.