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浅成低温热液贵金属和贱金属矿区下伏岩石有多种类型,本项研究只调查那些容矿岩石为火山岩的矿区。在这些矿区,脉状、网脉状、角砾状矿体赋存在近地表的流纹质到安山质的岩流、凝灰岩、角砾岩及侵入岩的断裂和裂隙中。据认为矿体的形成深度小于1000米,成矿时的温度在200—300℃之间。热液蚀变包括硅化、泥化、绢云母化、冰长石化及青盘岩化。典型的矿石构造有皮壳状构造、胶体条带状构造、梳状构造及角砾状构造。主要的矿石
There are many types of subducted rocks in the epithermal and base metal mines. This study only investigated those mined areas where the ore-bearing rocks are volcanic. In these mines, veins, reticular veinlets and brecciated orebodies occur in the near-surface rhyolts to andesite lithosphere, tuffs, breccias and intrusive rocks in the fractures and crevices. It is believed that the depth of ore body formation is less than 1000 meters and the temperature at mineralization is between 200-300 ℃. Hydrothermal alteration includes silicification, mudification, sericite, long ice petrification, and petrified rock formation. Typical ore structures are crust-shaped structures, colloidal ribbon-like structures, comb-like structures and brecciated structures. The main ore