赤峰大井子铜多金属矿构造叠加晕异常特征及找矿预测

Structural superimposed halo anomaly characteristics and prospecting prediction of Dajingzi copper polymetallic deposit in Chifeng City

赤峰大井子铜多金属矿位于大兴安岭南段锡、铜、铅、锌、银、钼多金属成矿带上,矿体受断裂构造控制。基于构造叠加晕的理论研究基础,本次研究对矿区内最大的1#脉进行了系统的原生晕研究。研究表明,矿体前缘晕指示元素为F、B、As、Sb、Hg,近矿晕指示元素为Cu、Ag、Sn,尾晕指示元素为W、Mn、Ni、Ti、V;原生晕轴向分带及特征参数显示有“反分带”现象,预示矿体深部有盲矿体的存在。通过建立矿区1#脉构造叠加晕模型及构造叠加晕垂直纵投影图提出下一步找矿靶区。

Dajingzi copper polymetallic deposit is located at the Sn-Cu-Pb-Zn-Ag-Mo polymetallic metallogenic belt in the south of Daxinganling Mountains.The orebodies are controlled by fault structures.This study has carried out systematic primary halo study on the largest ore vein 1#in the mining area,based on the theoretical research foundation of structural superimposed halo.The study result has shown that the elements of head halo are F,B,As,Sb,Hg,the near-orebody halo elements are Cu,Ag,Sn,and the tailing halo elements are W,Mn,Ni,Ti,V.The axial zoning sequence and geochemical parameters of structure superimposed halos show a“anti-zoning”sequence,which indicates the existence of blind orebody in the deep part of the known orebody.The prospecting target area is proposed in the vertical projection map of the structural superimposed halo for the establishment of structural superimposed halo model of ore vein 1#in the mining area.