摘要
原生晕叠加模型对于找寻隐伏矿体的矿种、规模、埋藏深度等具有重大的指示意义。董家埝银矿床属中低温热液型矿床,通过系统原生晕样品采集与分析,研究总结了该银矿床的横向及轴向原生晕特征,依据地表原生晕浓度分带特征,确定董家埝银矿体的内部晕元素为Ag、Sb、Pb、Zn、Au,中间晕元素为As、Cu,外部晕元素为Mo、Co、Bi;依据00勘探线元素特征确定轴向分带序列为W-Co-Pb-As-Cu-Sb-Ag-Mo-Bi-Zn-Au,呈现反分带特征,建立的原生晕叠加模型显示深部矿体尾部出现前、尾晕共存特征。原生晕研究表明在290 m中段及其深部可能有Au、Ag等隐伏矿体存在,其深部找矿潜力较大。
The primary halo superimposition model has significant indicative significance for determining mineral species,scale,and burial depth of concealed ore bodies.The Dongjianian silver deposit,classified as a medium-low temperature hydrothermal deposit,was systematically investigated through primary halo sampling and analysis.This study reveals distinct lateral and axial halo characteristics,identifying inner halo elements(Ag,Sb,Pb,Zn,Au),intermediate halo elements(As,Cu),and outer halo elements(Mo,Co,Bi)based on surface primary halo concentration gradients.According to the elemental characteristics along the No.00 exploration line,the axial zoning sequence is determined as W-Co-Pb-As-Cu-Sb-Ag-Mo-Bi-Zn-Au,showing a reverse zoning pattern.The established primary halo superimposed model reveals coexisting leading and trailing halos at the distal end of deep ore bodies.The primary halo characteristics indicate potential concealed Au and Ag ore bodies at the 290 m intermediate level and greater depths,demonstrating significant deep prospecting potential.
作者
董岘证
梁贞
聂艳敏
于天宇
张恒
Dong Xianzheng;Liang Zhen;Nie Yanmin;Yu Tianyu;Zhang Heng(No.2 Institute of Geological&Mineral Resources Survey of Henan,Zhengzhou 450001,Henan,China)
出处
《陕西地质》
2025年第1期47-52,共6页
Geology of Shaanxi
基金
河南省地质矿产勘查开发局地质科研项目(豫地矿科研[2021]Z-10号)资助。
关键词
董家埝银矿
原生晕模型
潜力评价
豫西地区
Dongjianian silver deposit
Primary halo model
Potential evaluation
Western Henan Province
