青海达达肯乌拉山铅锌矿床原生晕深部找矿预测
Deep Prospecting Prediction of the Dadakenwulashan Lead-zinc Deposit in Qinghai by Using Primary Halo Method
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摘要: 达达肯乌拉山铅锌矿床位于柴北缘成矿带南部，是近年来在泥盆系牦牛山组陆相火山岩中新发现的矿床。笔者对矿区00勘探线上3个钻孔岩心样数据，运用格里戈良原生晕分带指数法和构造叠加晕找盲矿法研究了原生晕特征。研究表明，Mo、Cu是铅锌矿体前晕，Sb是近矿晕，Au、As、Ag是矿尾晕；垂向分带序列由下向上为Ag→As→Au→Pb→Zn→Sb→Cu→Mo，序列具反向分带特征，铅锌成矿成晕是多次叠加的结果；矿（化）体轴向深部有前、尾晕叠加共存的重要信息，推测存在隐伏矿体。综上建立了该矿床深部找矿预测的成矿成晕模型。
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关键词:
- 原生晕 /
- 深部找矿预测 /
- 牦牛山组火山岩 /
- 达达肯乌拉山铅锌矿床 /
- 青海
Abstract: The Dadakenwulashan lead-zinc deposit is located in the southern part of the northern margin of the Qaidam Basin, which is a newly discovered deposit in the Devonian volcanic rocks of the Yushan Mountains.In this paper, the characteristics of the primary halo about three drilling holes have been studied by using the Grignelon halo zone index method and the tectonic superimposed halo prospecting method.The results show that Mo and Cu are the front halo of the lead-zinc orebodies, and Sb is the near-ore halo, Au, As and Ag are tail halo.The vertical zonation sequence is Ag → As → Au → Pb → Zn → Sb → Cu → Mo from the bottom up, this sequence has the characteristics of reverse zonation, and lead and zinc mineralization is the result of multiple superposition.The coexistence and superimposition of the front and tail halos suggest that the hidden ore body ore body is existed in the depth.Thus, the metallogenic halo model of deep ore prospecting is established in this paper. -
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