西山湾羊场银矿床位于华北地台北缘狼山—渣尔泰山中—新元古代裂谷带东段,赋存于白垩系下统白女羊盘组(K_1bn)酸性火山岩中,赋矿围岩主要为流纹岩、流纹斑岩、流纹质角砾岩。矿区断裂构造发育,矿床受断裂构造控制明显,含矿流纹斑岩破碎明显,具较强的硅化、黄铁矿化、萤石化等特征。该矿床的水系沉积物异常元素组合主要为Ag,W,As,Au,Sb,Pb,Bi,Mo,Zn,Cu,Hg,具有明显的浓度分带和组分分带,Ag异常极值点有一定的连续性。岩石地化异常Ag,Au,As,Sb,W,Mo等多元素组合异常套和较好。 The Xishanwan Yangchang silver deposit is located in the Langshan-Zhalt-Mesoproterozoic-Neoproterozoic rift zone in the northern margin of the North China Platform and occurs in the K1bn acidic volcanic rocks of the Lower Cretaceous. Rocks are mainly rhyolite, rhyolite porphyry, rhyolitic breccia. The fault structure of the mining area develops and the deposit is obviously controlled by the fault structure. The ore-bearing rhyolite porphyry is obviously broken with strong features of silicification, pyrite and fluorite. The anomaly elements of the sediments in this deposit are mainly composed of Ag, W, As, Au, Sb, Pb, Bi, Mo, Zn, Cu and Hg with obvious concentration zoning and component zoning, There is some continuity. Geochemical abnormalities such as Ag, Au, As, Sb, W, Mo and other multi-element anomaly sets are better.