青海大格勒沟脑北金矿床土壤地球化学异常特征及找矿意义  

Soil Geochemical Anomaly Characteristics and Prospecting Significance of Dagelegounaobei Gold Deposit in Qinghai Province

作　　者：王伟虎 冶福元 马永俊 WANG Wei-hu;YE Fu-yuan;MA Yong-jun(Key Laboratory of Salt Lake Resource Exploration and Research in Qaidam Basin,Golmud 816099,Qinghai,China;Qinghai Qaidam Institute of Comprehensive Geology and Mineral Exploration,Golmud 816099,Qinghai,China)

机构地区：[1]青海省柴达木盆地盐湖资源勘探研究重点实验室,青海格尔木816099 [2]青海省柴达木综合地质矿产勘查院,青海格尔木816099

出　　处：《中国钼业》2022年第5期1-7,共7页China Molybdenum Industry

摘　　要：大格勒沟脑北金矿床地处东昆仑南坡俯冲增生杂岩带,位于东昆仑南部Cu-Co-Au成矿带内,成矿地质条件优越。区内开展了1∶10000土壤地球化学测量工作,元素含量及组合特征显示区内Au、As和Pb元素在矿区范围内浓度和变异系数均较高,成矿元素含量高且易于活化迁移,有利于局部富集成矿。区内主成矿元素Au与As、Sb、Pb关系密切,本区成矿元素组合可分为Au-As-Sb-Pb和Ag-Zn-Cu两类。在各成矿元素异常、组合异常分析基础上,在区内圈定土壤异常6处,各异常基本上以Au元素为主元素,伴生元素As、Sb与主元素间套合较好。经探槽和钻探等工程揭露,AP2、AP5异常内发现金矿(化)体13条,二者均为矿致异常,AP1、AP3、AP4和AP6异常内破碎蚀变带发育且基本与与异常展布方向一致,土壤地球化学异常指示意义明显。Dagelegounaobei gold deposit is located in the subduction accretion complex belt on the southern slope of East Kunlun,and in the Cu-Co-Au metallogenic belt in the south of East Kunlun,with favorable metallogenic geological conditions.1∶10000 soil geochemical survey was carried out in this area.The element content and combination characteristics showed that the concentration and variation coefficient of Au,As and Pb elements were high in the mining area,and the ore-forming elements were rich in content and easy to activate and migrate,which was conducive to local enrichment and mineralization.The main ore-forming element Au was closely related to As,Sb,Pb,and the ore-forming element assemblages in this area could be divided into Au-As-Sb-Pb and Ag-Zn-Cu.Based on the analysis of ore-forming element anomalies and combination anomalies,six soil anomalies were delineated in the area.Au element was the main element in the anomalies,and the associated elements As and Sb were interfitted with the main element.By trial trench and drilling,13 gold(mineralization)bodies were found in AP2 and AP5 anomalies,which were ore-induced anomalies,and the fracture alteration zones developed in AP1,AP3,AP4 and AP6 anomalies,and basically distributed in the same direction as the anomalies,indicating the significance of soil geochemical anomalies.

关 键 词：大格勒沟脑北金矿床 土壤地球化学特征 变异系数 成矿元素组合 异常圈定 

分 类 号：P618.51[天文地球—矿床学]