青海省都兰县色日金银矿床地质、化探异常特征及地质意义  

Geological and geochemical anomaly characteristics and geological significance of Seri Gold-Silver Deposit in Dulan County,Qinghai Province

作　　者：王卓一 孙九达 张志强 孙国胜[1] 李雪 吴胜宝 马冬 Wang Zhuoyi;Sun Jiuda;Zhang Zhiqiang;Sun Guosheng;Li Xue;Wu Shengbao;Ma Dong(College of Earth Sciences,Jilin University;The Third Nonferrous Geological Exploration Institute in Qinghai Province)

机构地区：[1]吉林大学地球科学学院 [2]青海省有色第三地质勘查院

出　　处：《黄金》2023年第2期73-77,94,共6页Gold

基　　金：中国地质调查局发展研究中心项目(WKZB1911BJM300369/006,WKZB2011BJM300175/016)。

摘　　要：在对色日金银矿床进行相关资料综合研究的基础上,分析了矿床成因类型和不同比例尺化探异常特征,并探讨了其地质意义。研究结果表明:金、银矿体与矿区内大面积分布的印支晚期花岗岩时空关系密切,金矿体主要受北东向断裂控制,银矿体主要受近东西向断裂控制,金、银矿体产生明显分异,表明二者为不同成矿期(阶段)的产物。不同比例尺(1∶20万、1∶5万、1∶2.5万)化探测量圈定的综合异常除主成矿元素Au、Ag外,Sn、Co、Ni、Pb、Zn、As、Sb、Mo、Bi等共生或伴生元素较发育,少数综合异常以共生或伴生元素为主。1∶2.5万化探异常中,金矿化近矿异常以Au(Ag、As)为主,远矿异常通常出现Sn、Co、Ni、Pb、Zn、As、Sb、Mo、Bi等其中几种元素组合,而Au异常较弱;银矿化近矿异常以Ag或Ag、Pb组合异常为主。1∶2.5万化探远矿异常与矿化带的空间位置并不吻合,应根据异常区地形及水系发育情况向山顶及水系上游进行追索找矿。Based on a comprehensive study of relevant data on the Seri Gold-Silver Deposit,the genesis type of the deposit and the characteristics of geochemical anomalies at different scales were analyzed,and their geological significance was discussed.The results show that the gold and silver ore bodies are closely related to the late Indosinian granites in space and time,which are distributed over a large area in the mine area.The gold bodies are mainly controlled by NE fractures,and the silver bodies are mainly controlled by near EW fractures.There are obvious differences between gold and silver ore bodies,indicating that they are products of different metallogenic periods(stages).In addition to Au and Ag,Sn,Co,Ni,Pb,Zn,As,Sb,Mo,Bi,and other symbiotic or associated elements relatively develop in the comprehensive anomalies delineated by geochemical measurements at different scales(1∶200000,1∶50000,1∶25000),and a few comprehensive anomalies are dominated by symbiotic or associated elements.The 1∶25000 geochemical anomalies are dominated by Au(Ag,As),and the distant mineral anomalies are usually a combination of several elements such as Sn,Co,Ni,Pb,Zn,As,Sb,Mo,Bi,etc.,while the Au anomalies are weak;the near mineral anomalies of silver mineralization are dominated by Ag or Ag,Pb composite anomalies.1∶25000 geochemical exploration distant mineral anomalies do not coincide with the spatial location of the mineralized zone.It should be traced to the top of the mountain and upstream of the water system according to the terrains and water system development of the anomaly area.

关 键 词：地质特征 综合异常 矿体 地质意义 金银矿床 色日 

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