石泉羊坪湾金矿床韧性剪切带特征及找矿标志

羊坪湾金矿位于巴山弧形断裂东侧，矿区总体构造为-呈NW走向的紧闭褶皱，金矿体受北西向展布的脆-韧性剪切带控制，剪切带内窗棂褶皱、小褶曲、微褶皱劈理、节理构造及片理化带相当普遍，特别是金矿化蚀变带内及近旁更为发育；另外，岩石的显微组构也反映强烈的揉皱构造、岩石裂隙、碎裂结构、碎斑结构等，这些对金元素赋存有利；早期形成金的矿源层，在韧性剪切作用下，使金元素被激活并发生迁移，在软硬岩层的接触面附近或断裂处聚集形成金矿体；金矿化与褐铁矿化、纤维状黄铁矿、细粒黄铁矿化和石英脉关系密切；进而总结了该区8条找矿标志。

The Feature of Ductil Shear Zone and Ore-searching Criteria of Yangpingwan Gold Deposit in Shiquan County

Yangpingwan gold deposit located to the east of Bashan areual fault, has a closed fold as a whole structure, the ore bodies are controlled by brittle-ductile shear zone. There are rodded folds, little buckles, tiny fold cleavages and schistose zones in the shear zone everywhere, especially within gole mineralizing alterative zone or in the vicinity. In addition, the micro- constitution also reflects that wrinkle structure , fissure , fractured texture , mortar texture and so on are favorable to gold occurrence. In the origin ore source bed formed early, gold element became active and begun to transfer, gathered to form ore body in the vinicity of interface between soft rock and tough rock or fault zone. Gold mineralization correlated with limonitization, fibrous pyrite, fine granular pyritization and quartz veinlet closely. Base these, eight ore-searching criteria were deduced in this area.