豫西龙门店银矿K9矿体原生晕特征及深部预测

Characteristics of Primary Halo of the K9 Orebody in the Longmendian Silver Deposit, Western Henan Province and Deep Orebody Prediction

对龙门店银矿K9矿体Au、Ag、Cu、Pb、Zn、W、Mo、Hg、As、Sb、Bi等11种指示元素进行了统计学分析,研究矿体的原生晕特征。结果表明,区内可能经历了多期岩浆活动,成矿过程复杂,Pb、Zn可作为矿体深部预测的重要指示元素。计算得到矿体自上而下的轴向分带序列为WMo-Au-Hg-Cu-As-Bi-Zn-Ag-Sb-Pb,尾晕元素W、Mo位于分带序列的最上部,Hg、Sb、As与W、Mo、Bi元素相互叠加,有明显的反分带现象,认为矿体向下有较大延伸,推测在960m以下沿矿体侧伏方向仍有较大的找矿潜力。

Longmendian mine area may experience multi-period magma activity episodes, ore-forming process is perplexed and Pb, Zn can be used as the important indicator elements in the prediction of K9 deep orebody in the Longmendian silver deposit, according to the results of statistical analysis of 11 kinds of elements （Au, Ag, Cu, Pb, Zn, W, Mo, Hg, As, Sb, Bi） in K9 orebody which can be used to study characteristics of primary Halo. Axial zoning sequence of the indicator elements is described as follows： W-Mo-Au-Hg-Cu-As-Bi-Zn-Ag-Sb-Pb, W and Mo which are rear halo elements lie in the top of axial zoning sequence of the indicator elements, Hg, Sb, As, W, Mo and Bi are superimposed. These above information shows that there is a obvious reverse zoning feature in the K9 orebody, which indicates that there is excellent mineralization in the deep parts along the pitch direction of the orebody under 960m profile.