焦家金矿深部原生晕地球化学特征

Geochemical Characteristics of Primary Halo in Deep Part of Jiaojia Gold Deposit

摘要:

焦家金矿是胶西北地区典型的金矿床，该区成矿具有多期、多阶段叠加共同作用的特点。通过对典型剖面上钻孔不同部位岩性样品的微量元素测试分析，运用数学地质分析方法，对焦家金矿床深部地球化学特征进行了研究，得出深部成矿微量元素特征组合为Au,Ag,Cu,Pb,Zn,As,Sb,Bi,Hg,W,Mo,Sn；原生晕轴向分带序列为：Hg,As,Sb(矿头晕)→Au,Ag,Cu,Pb,Zn,Bi,Sn(矿中晕)→W,Mo(矿尾晕)。由此建立了地球化学原生晕异常模型，并总结了地球化学找矿标志，为深部找矿提供依据。

Abstract:

Jiaojia gold deposit is a typical gold deposit in northwestern Jiaodong peninsula. The mineralization of gold deposits has the characteristics of multistage and multstage superposition. By using mathematic geology method, geochemical data of the trace elements have been analyzed for the samples with different depths from drilling program. Au，Ag，Cu，Pb，Zn，As，Sb，Bi，Hg，W，Mo and Sn are dizziness indicator element. The axial zonality sequences of primary halo can be classified as follows: Hg,As,Sb(head halo) →Au,Ag,Cu,Pb,Zn,Bi,Sn(middle halo)→W,Mo(tail halo). At the same time, geochemical prospecting model of the deposit and corresponding exploration indicators have been established. It will provide geochemical evidence for deep prospecting.