藏东达翁金矿区土壤地球化学特征与找矿潜力研究  

Soil Geochemical Characteristics and Prospecting Potential of the Daweng Gold Mine in Eastern Xizang

作　　者：岳国利 桂新星 宋立强 李敏 崔霄峰 田晓敏 YUE Guoli;GUI Xinxing;SONG Liqiang;LI Min;CUI Xiaofeng;TIAN Xiaomin(Henan Academy of Geology,Zhengzhou,Henan 450001;Henan Key Laboratory of Metal Mineral Mineralization Geological Process and Resource Utilization,Zhengzhou,Henan 450001;Henan Institute of Geological Sciences,Zhengzhou,Henan 450001)

机构地区：[1]河南省地质研究院,河南郑州450001 [2]河南省金属矿产成矿地质过程与资源利用重点实验室,河南郑州450001 [3]河南省地质科学研究所,河南郑州450001

出　　处：《地质与勘探》2023年第6期1204-1216,共13页Geology and Exploration

基　　金：河南省地质矿产勘查开发局地质勘查项目(编号:豫地矿〔2017〕03号、豫地矿〔2020〕01号)资助。

摘　　要：藏东达翁金矿区位于班公湖-怒江成矿带东段,其成矿地质背景和成矿地质条件优越。为研究该矿区找矿潜力,利用SPSS软件对1∶10000土壤地球化学测量获得的Au、Ag、Cu、Pb、Zn、As、Sb、Mo、W、Bi等10种元素数据进行多元统计分析,运用元素异常NAP值累加方法和组合元素NAP值异常评序方法分别对各元素的成矿潜力及综合异常的找矿潜力进行评价。结果表明:区内矿化与中酸性岩浆热液有关,Pb、As、Sb、Ag、Bi是矿化体前缘晕指示元素,Au是主成矿元素,W是近矿指示元素,Cu、Mo是矿化体尾晕指示元素;Au的成矿潜力最大,Bi、Mo成矿潜力较大,Sb、Ag有一定的成矿潜力;区内共圈定土壤地球化学综合异常5个,其中HS-1综合异常找矿潜力最大,其次是HS-4综合异常。结合成矿地质特征和异常查证结果认为,区内具有寻找隐爆角砾岩型金矿、斑岩型钼金矿的巨大潜力及热液型银锑铋多金属矿的较大潜力。The Daweng gold mine is located in the eastern part of the Bangong hu-Nujiang metallogenic belt,with superior metallogenic geological background and mineralization conditions.In order to study the prospecting potential in the area,the SPSS software was used to conduct multivariate statistical analysis on the data of ten elements,including Au,Ag,Cu,Pb,Zn,As,Sb,Mo,W and Bi obtained from 1:10000 soil geochemical measurements.The mineral prospecting potential of each element and the prospecting potential of comprehensive anomalies were evaluated by using the methods of element anomaly NAP value accumulation and combined element NAP value anomaly evaluation.The results indicate that the mineralization in the area is related to intermediate-acidic magmatic hydrothermal fluids.Pb,As,Sb,Ag,Bi are indicator elements for the front halo of the mineralization bodies,Au is the main mineralization element,W is the near-ore indicator element,and Cu,Mo are indicator elements for the tail halo of the mineralization bodies;Au has the greatest ore-forming potential,while Bi and Mo have greater ore-forming potential,and Sb and Ag also have certain ore-forming potential.A total of five comprehensive soil geochemical anomalies have been delineated in the area,of which the HS-1 comprehensive anomaly has the greatest potential for mineral exploration,followed by the HS-4 comprehensive anomaly.Based on the geological characteristics of mineralization and anomaly investigation,it is believed that there is enormous potential to search for hidden explosive breccia type gold deposits,porphyry type molybdenum gold deposits,and hydrothermal type silver antimony bismuth polymetallic deposits in the area.

关 键 词：土壤地球化学 单元素异常 综合异常 找矿潜力 达翁金矿区 藏东 

分 类 号：P632.1[天文地球—地质矿产勘探] P612[天文地球—地质学]