柴北缘滩间山金矿区Au-As-Sb地球化学异常组合及其外围找矿预测应用  

Au-As-Sb geochemical anomaly association of the Tanjianshan gold deposit in the northern margin of Qaidam basin and its application of peripheral prospecting prediction

作　　者：王进寿[1] 安永尉[1] 李鹏 朱传宝 王莎 王建国[6] 周豪 WANG Jinshou;AN Yongwei;LI Peng;ZHU Chuanbao;WANG Sha;WANG Jianguo;ZHOU Hao(The Northern Qinghai-Tibet Plateau Geological Processes and Mineral Resources Laboratory,Qinghai Geological Survey Institute,Xining 810012,Qinghai,China;The First Geological Mineral Exploration Institute of Qinghai Province,Haidong 810000,Qinghai,China;Bureau of Geology and Mineral Exploration and Development of Qinghai Province,Xining 810008,Qinghai,China;The No.3 Institute of Geology Exploration of Qinghai Province,Xining 810029,Qinghai,China;The No.4 Institute of Geology Exploration of Qinghai Province,Xining 810006,Qinghai,China;Department of Geological Engineering,Qinghai University,Xining 810003,Qinghai,China)

机构地区：[1]青海省地质调查院青藏高原北部地质过程与矿产资源重点实验室,青海西宁810012 [2]青海省第一地质矿产勘查院,青海海东810000 [3]青海省地质矿产勘查开发局,青海西宁810008 [4]青海省第三地质矿产勘查院,青海西宁810029 [5]青海省第四地质矿产勘查院,青海西宁810006 [6]青海大学地质工程系,青海西宁810003

出　　处：《矿产勘查》2023年第4期608-615,共8页Mineral Exploration

基　　金：青海学者专项“柴达木盆地及周缘战略性矿产成矿作用及找矿突破”(QHS201802);中国矿产地质志项目(DD20221695、DD20190379、DD20160346)联合资助。

摘　　要：Au-As-Sb地球化学异常组合在中低温热液型金矿床中常指示着矿体前缘晕相或中浅部矿体的出露,对剥蚀较弱的金矿床而言,该组合化探异常有利于指引造山型金矿床浅部金矿体的发现。不同于传统化探需测试数十个元素、处理上万个数据而圈定异常的惯例,在柴北缘成矿带滩间山金矿区及外围水系沉积物研究中,采用Au-As-Sb元素组合特征分析方法圈定多个Au-As-Sb地球化学异常组合,大幅提高了水系沉积物勘查的工作效率。同时,R型聚类分析表明Au、As、Sb元素之间相关性强,与已发现的青龙沟、金龙沟大型造山型金矿床地质特征、主成矿期自然金+黄铁矿+毒砂+(黄铜矿+方铅矿+闪锌矿)矿石矿物组合、造山型金矿床连续成矿模型Au、As、Sb纵向变化规律等特点基本一致,表明该地区矿床赋存深度处于中浅成,预示着该矿床外围和深部具有较好找矿前景。Au-As-Sb geochemical anomaly assemblages often indicate the front halo facies of ore bodies or the outcrop of shallow ore bodies in medium-low temperature hydrothermal gold deposits.For gold deposits with weak denudation,this combination of geochemical anomalies is conducive to guiding the discovery of shallow gold ore bodies in orogenic gold deposits.Different from the traditional geochemical exploration,which needs to test dozens of elements and process tens of thousands of data to delineate anomalies,in the study of the Tanjianshan gold min⁃ing area and peripheral stream sediments in the northern margin of Qaidam basin,the Au-As-Sb combination analysis method is used to delineate multiple geochemical anomalies,which significantly improves the efficiency of stream sediment exploration.At the same time,the R-type cluster analysis shows that there is a strong correlation between Au,As and Sb elements,which is consistent with the geological characteristics of the discovered Qinglonggou and Jinlonggou large-scale orogenic gold deposits,the ore mineral assemblage characteristics of natural gold+pyrite+arsenopyrite+(chalcopyrite+galena+sphalerite)in the main metallogenic period,and the vertical variation law of Au,As and Sb in the continuous metallogenic model of orogenic gold deposits,indicating that the occurrence depth of the stakes in this area is in the middle and shallow,indicating that the periphery and deep parts of the deposit have good prospecting prospects.

关 键 词：Au-As-Sb组合 中低温热液型 成矿预测 滩间山金矿外围 柴北缘 

分 类 号：P611[天文地球—矿床学]