破山银矿银的平均品位较高,矿体受层位控制,沿走向、倾向均较稳定。该类型矿床中银的赋存状态研究,对指导找煤和工业利用有重要意义。一、矿床地质概况桐柏金银矿床分布于秦岭东西复杂构造带的东段南支,位于河前庄背斜西北段的下古生界歪头山组变质岩系巾。这套变质岩系主要由变粒岩、云母石英片岩及角 The average grade of silver in Broken Hill Silver Mine is higher, and the orebodies are controlled by horizon and tend to be more stable along the strike and inclination. The research on the occurrence of silver in this type of deposit is of great significance to guide the finding of coal and industrial utilization. I. Geological Survey of the Deposits The Tongbai gold and silver deposits are located in the south branch of the eastern section of the Qinling-West complex belt and are located in the metamorphic rock line of the Yuntoushan Formation of the Lower Paleozoic in the northwestern segment of the Hezianzhuang anticline. This set of metamorphic rocks is mainly composed of granulite, mica-quartz schist and horn