柿树底金矿床围岩蚀变特征与金矿化关系研究

柿树底金矿床赋存于中元古界熊耳群安山岩中,矿体受断裂破碎带控制。通过对柿树底金矿床围岩蚀变特征与金矿化关系的研究发现:在蚀变类型中硅化、黄铁矿化、钾长石化与金矿化关系最为密切;蚀变演化划分为三个时期,三个时期根据时间与空间关系划分为四个阶段,其中第二阶段石英-钾长石-黄铁矿化阶段是主矿化阶段;围岩蚀变自中心向外划分为三个蚀变矿物组合带,其中核心带矿化蚀变岩带与金矿化关系最为密切。水-岩反应引发的围岩蚀变是形成柿树底金矿床金元素富集成矿的主要原因。

Research on the Relation between Wall-rock Alteration and Gold Mineralization in Shishudi Gold Deposits

The Shishudi gold deposits is located in Mesoproterozoic Xiong'er Group Anshan Ore.The orebody is con trolled by fracture zone.By researching the wall-rock alteration and the relations of the gold mineralization in Shishudi gold deposits,it is found that silicification,pyrite,and K-feldspar are most closely related with gold mineralization in the alteration types.Alteration evolution is dvided into three periods.According to the relation between time and space,three periods is divided into four stages.The seond phase of quartz-feldspar-stage is the main mineralization stage;Wall-rock alteration from the center to the outside is divied into three alteration mineral assemblage zones.The core belt with mineralization alteration and gold mineralization is mostclosely related.Wall-rock alteration triggered by the formation of water-rock reaction is the main reason for gold enrichment in the Shishudi gold deposits.