胶西北西岭特大型金矿床蚀变围岩特征研究  

The Characteristics of Altered Surrounding Rocks in XiLing Extra Big Gold Deposit,Northwest of Jiaodong

作　　者：刘祥朋 王玺 宋英昕 张琪 张聪颖 

机构地区：[1]山东黄金地质矿产勘查有限公司,山东莱州261400 [2]山东黄金矿业(莱州)有限公司三山岛金矿,山东莱州261400 [3]山东黄金集团有限公司深井开采实验室,山东莱州261400 [4]山东省地质科学研究院,山东济南250013 [5]河北省区域地质矿产调查研究所,河北廊坊065000

出　　处：《东华理工大学学报（自然科学版）》2017年第3期225-236,共12页Journal of East China University of Technology(Natural Science)

摘　　要：西岭金矿是胶西北地区近年来发现的特大型金矿,它位于三山岛-仓上断裂带北端。矿区内发育的矿体赋存于中生代花岗岩中,矿体严格受断裂带控制。受热液蚀变作用影响,矿体围岩蚀变发育,主要发育钾化、硅化、黄铁绢英岩化、碳酸盐化等蚀变,且蚀变分带明显。蚀变岩与金矿化关系密切,金矿化的强弱与蚀变带的宽度及蚀变发育程度具正相关性,金矿体主要赋存在黄铁绢英岩中。本次研究选取贯穿蚀变带的钻孔岩石样品进行地球化学分析,分析结果显示蚀变过程中主微量元素有规律的活动,改变了热液流体的酸碱度,破坏了金络合物,使Au元素富集沉淀。Xiling Gold Mine is a large gold mine It is located at the northern of the Sanshandao-C discovered in the northwest of the JiaoDong area in recent years angshang fault zone. The ore bodies developed in the mining area are in the Mesozoic granites, and the ore bodies are strictly controlled by the fault zones. The altered wall rock is affected by the alteration of the hydrothermal fluid. The wall rock alteration mainly have potash feldspathization, silication, beresitization, carbonatation, and the alteration is zoned. The alterated rocks is closely related to gold mineralization. The strength of gold mineralization is positively correlated with the width and alteration degree of alteration zone. The gold ore body mainly exists in the beresitization. In this study, the drilling rock samples through the alteration zone was seclected to geochemical analysis. The results show that the main trace elements have regular activity during the alteration process, changed the pH of the hydrothermal fluid, destroyed the gold complex, so that the Au element enrichment precipitation

关 键 词：西岭金矿 蚀变岩 地球化学特征 胶西北 

分 类 号：P618.51[天文地球—矿床学]