甘肃舟曲羊里尾沟金矿床原生晕特征及深部找矿预测  

Primary halo characteristics and prospecting prediction deep in Yangliweigou Gold Deposit in Zhouqu,Gansu Province

作　　者：柳生祥 雷祥军 刘景显 高翔 赵向农 Liu Shengxiang;Lei Xiangjun;Liu Jingxian;Gao Xiang;Zhao Xiangnong(The Third Institute Geological and Mineral Exploration of Gansu Provincial Bureau of Geology and Mineral Exploration and Development)

机构地区：[1]甘肃省地质矿产勘查开发局第三地质矿产勘查院

出　　处：《黄金》2021年第1期1-6,共6页Gold

基　　金：中国地质调查局项目(12120114050001)。

摘　　要：对羊里尾沟金矿床矿体集中分布的北西西向矿带7条勘探线27个钻孔采集了1223件样品,分析了Au等15种元素。元素的参数统计、因子分析结果表明,成矿元素及其指示元素Au、As、Sb、Hg明显富集,并且为中低温热液矿床中常见的低温元素组合。依据元素分带指数计算建立的矿区原生晕叠加轴向(垂直)分带序列为Hg-As-Sb(前缘晕)→Au-W-Zn-Co-Bi(近矿晕)→Cr-Ni-Sn-Mo-Ag-Pb-Cu(尾晕),并发育较强的尾晕与前缘晕叠加,与矿体沿走向和倾向呈尖灭再现的事实吻合。利用元素累乘比值和原生晕异常剖面,预测矿区深部有盲矿体存在。1223 samples were collected from 27 drilling holes along 7 exploration lines in the NWW ore belt of Yangliweigou Gold Deposit where ore bodies are concentrated,and 15 elements such as Au were analyzed.The statistical parameter characteristics and factor analysis results of the elements show that the ore-forming elements and their indicator elements Au,As,Sb,Hg are obviously enriched,and are the low-temperature element combinations common in the middle and low-temperature hydrothermal deposits.The axial(vertical)zoning sequence of primary superimposed halo in the mining area,established according to the calculation of element zoning index,is Hg-As-Sb(front halo)→Au-W-Zn-Co-Bi(near halo)→Cr-Ni-Sn-Mo-Ag-Pb-Cu(tail halo),and the superposition of strong tail halo and front halo develops,which is consistent with the fact that the ore body pinches out and reappears along the strike and trend.It is predicted that there are blind ore bodies in the deep part by using the ratio of element multiplication and the anomalous section of primary halo.

关 键 词：原生晕 轴向分带 叠加晕模型 信息提取 找矿预测 羊里尾沟金矿床 

分 类 号：TD15[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]