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一、地质特征 某金银矿所处大地构造位置为秦岭褶皱带北缘与北西向深大断裂带之间的过渡带上。沿该断裂带有不同期的许多中酸性岩体侵入。某金银矿就处于一背斜倾末端南侧的二长花岗岩体中。二长花岗岩呈岩舌伸入奥陶系地层中,矿化主要集中于岩舌部位,但在内、外接触带亦有矿化。(见图1a)地层岩性主要为绿泥绢云母石英片岩、黑云母石英片岩、阳起石绿泥片岩等。 矿化主要受岩体内破碎带控制,岩舌部位破碎带十分发育(见图1b),以NW为
First, the geological characteristics of a gold and silver deposit in the tectonic location of the Qinling fold belt and the northwestern margin of the deep belt between the transition zone. Many intrusive rock intrusions with different periods along the fault. A gold and silver mine is located in the anticlinal end of the southern side of a long granite body. The two long granite rock tongue is inserted into the Ordovician strata, mineralization is mainly concentrated in the rock tongue parts, but also in the outer and inner contact with mineralization. (See Figure 1a). The stratigraphic lithologies are mainly chlorite sericite quartz schist, biotite quartz schist, and Yangding Shi chlorite schist. The mineralization is mainly controlled by the crushed rock in the rock mass, and the rock fragments are well developed (see Figure 1b). NW is