河南桐柏围山城金、银成矿带矿床地质特征及找矿标志

Geological characteristics and clues for prospecting of Weishancheng Au-Ag metallogenic belt in Tongbo of Henan

围山城金银成矿带矿床位于桐柏―大别山(北坡)金银成矿带北亚带。矿体主要赋存于上元古界歪头山组炭质绢云石英片岩内,严格受构造条件控制,含矿层受热液作用影响产生不同蚀变,尤其硅化与矿化的关系最为密切。矿区成矿地质条件优越,资源丰富。笔者在对矿带内地层、岩石、构造、围岩蚀变等较为详细分析的基础上提出了找矿标志。

Weishancheng Au-Ag metallogenic belt deposit is located at north subzone of Tongbo-Dabieshan （north slope）Au-Ag metallogenic belt.The orebodies mainly occur in carbon-bearing sericitic quartz schist of Epiproterozoic Waitoushan groups and it is under strict control of tectonic setting.The ore-bearing forma-tion is affected by hydrothermal fluid and generates different alteration,while mineralization is closely relat-ed to silicification.The mining area has favorable mineral-formation conditions and abundant resource.Based on the detailed analysis of formations,rocks,structure and wall rock alteration in the mining area,the au-thor proposes clues for prospecting.