石鸡坝一带金矿成矿地质特征及其找矿标志

石鸡坝一带金矿属阳山金矿田的西延部分，在西秦岭的金矿中占有重要地位，重新系统总结其成矿规律和找矿标志具有现实意义。研究表明，石鸡坝一带金矿的成矿规律主要体现在构造控矿、岩脉控矿和岩性控矿。不同类型矿石的物质成分基本相似，均为Fe、Cu、As、Sb等的化合物；差异主要表现在花岗斑岩型金矿石的化学成分富K2O，脉石中有含水的铁、镁硅酸盐矿物。矿床地质及稳定同位素资料证明，矿床成因属于多元热液复合形成的中低温热液金矿。Au、Hg、As、Sb等元素前缘晕异常、以褐铁矿化为主的构造蚀变带及中酸性岩脉分布区是该类型金矿的重要找矿标志。区域地质及地球化学资料显示自石鸡坝至阳山一带找矿前景良好，但具体的找矿突破区段尚待进一步的研究。

METALLOGENIC GEOLOGY OF YANGSHAN GOLD OREFIELD AND ITS SIGNS FOR PROSPECTING

Yangshan gold orefield, including Shijiba gold deposit, play an important role in the west Qinling., and it is of realistic significances to summarize over again its metallogenic laws and signs for prospectimg. It is indicated that the metallogenic laws of Yangshan gold orefield manefest theirselves mainly in the ore-controlling roles of structures, veins and lithology. The mineral components of different type of ores are basically similar to each other, which are characterized by the compounds of Fe, Cu, A...