青海省大柴旦锡铁山地区水系沉积物特征及对找矿的指导意义  

Characteristics of Water Sediments in Dachaidan Xitieshan Area of Qinghai Province and Their Guiding Significance for Prospecting

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作  者:王海伟 王超[1] 杜永博 张鹏飞 王玉龙 Wang Haiwei;Wang Chao;Du Yongbo;Zhang Pengfei;Wang Yulong(Xining Center of Natural Resources Comprehensive Survey,China Geological Survey,Xining 810012,China)

机构地区:[1]中国地质调查局西宁自然资源综合调查中心,西宁810012

出  处:《青海科技》2024年第6期108-121,共14页Qinghai Science and Technology

基  金:中国地质调查项目“青海大柴旦滩间山地区金多金属资源调查评价”(DD20242767)。

摘  要:青海省大柴旦锡铁山地区位于青藏高原北部柴达木盆地与祁连板块的结合部位,是我国西北地区重要的金多金属矿产地,具有较好的找矿潜力。文章通过开展锡铁山地区1∶5万水系沉积物测量工作,结合研究区地质背景,对区内与优势矿种相关的19种元素(Au、Ag、Cu、Pb、Zn、W、Mo、Mn、As、Sb、Cd、Cr、Ni、Co、Sn、U、Th、Ti、Ba)的地球化学特征进行研究,通过聚类分析、因子分析确定元素组合异常,进而圈定成矿综合异常。结果表明:Cd、Pb、Au、Zn、W在研究区高强数据多,变化幅度也很大,成矿可能性极大;上泥盆统牦牛山组地层中有寻找Mo的潜力;黑云二长花岗岩中具有Au、W矿潜力。区内共圈定23个综合异常,可为找矿提供依据。Located at the junction of Qaidam Basin and Qilian Plate in the northern part of the QinghaiTibet Plateau,the Dachaidan Xitieshan area of Qinghai Province is an important gold polymetallic mineral area in Northwest China,with good prospecting potential.In this paper,the geochemical characteristics of 19 elements(Au,Ag,Cu,Pb,Zn,W,Mo,Mn,As,Sb,Cd,Cr,Ni,Co,Sn,U,Th,Ti,Ba)related to dominant minerals in the area were studied by carrying out the measurement of 1∶50,000 river sediments in the Xitieshan area and the geological background of the study area.The results show that there are many high-intensity data of Cd,Pb,Au,Zn and W in the study area,and the variation range is also very large,and the possibility of mineralization is great.There is potential to search for Mo in the strata of the Upper Devonian Yakniushan Formation.The biotite monzogranite has the potential for Au and W deposits.A total of 23 comprehensive anomalies were delineated in the area,which can provide a basis for prospecting.

关 键 词:1∶5万水系沉积物 锡铁山区域 找矿意义 

分 类 号:P612[天文地球—矿床学] P595[天文地球—地质学]

 

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