摘要
海南戈枕金矿带内金矿床沿戈枕韧性剪切带分布，严格受其控制。通过对戈枕金矿带三种主要金矿类型地质特征及其成矿特征的研究，指出在戈枕韧性剪切带演化的不同阶段，金矿化作用不相同。在早阶段剪切带发育大规模的“毛细管微循环系统”，主要形成了糜棱岩型金矿。在晚阶段剪切位移量增大，形成剪切扩容空间，主要形成了石英脉型金矿，同时对前阶段形成的糜棱岩型金矿有富集作用。韧性剪切带与金矿化连续同时，成岩与成矿是相同地质事件在不同地质环境下的产物，金成矿主要为同韧性剪切成矿。
Gold deposits of Gezhen gold belt in Hainan are distributed along Gezhen ductile shear zone. Study of the geological and mineralization features of three main gold deposits in the gold belt shows that gold mineralization is different during evolution of the ductile shear zone. In the early stage, large “ scale blood capillary microcirculation system ” is developed and mylonite type gold deposits are formed. In the late stage, shear enlarged space is developed and quartz vein type gold deposits are formed, which make the former mylonite gold deposits enriched. Mineralization and diagenesis are production of the same geological event in different enviroment. Gold mineralization is mainly synductile shear mineralization.
出处
《黄金地质》
1998年第3期22-26,共5页
Gold Geology
关键词
金矿床
控矿构造
成矿特征
金矿带
gold deposit, synductile shear mineralization, Hainan
