河南嵩县九仗沟金矿床地球化学特征与勘查模式  

Geochemical Characteristics and Exploration Model of the Jiuzhanggou Gold Deposit,Songxian County,Henan Province

作　　者：张勇 李水平 荆鹏 冯攀 ZHANG Yong;LI Shuiping;JING Peng;FENG Pan(No.2 Institute of Geological and Mineral Resources Survey of Henan Co.,Ltd.,Zhengzhou 450001,Henan,China)

机构地区：[1]河南省第二地质矿产调查院有限公司,河南郑州450001

出　　处：《黄金科学技术》2024年第2期258-269,共12页Gold Science and Technology

基　　金：河南省地质矿产勘查开发局财政规划地质科研项目“河南省嵩县九仗沟—东湾金矿区找矿预测研究”(编号:豫地矿勘查〔2022〕04号)资助。

摘　　要：九仗沟金矿位于熊耳山—外方山矿集区内的蛮峪—店房金矿带北段,是典型的大型构造蚀变岩型金矿床。采用1/5万水系沉积物测量圈定了找矿靶区,1/1万土壤地球化学测量确定了矿化富集部位,岩石地球化学(原生晕)测量识别出构造破碎带和矿化强度,并预测矿体相对剥蚀程度。研究表明:不同尺度地球化学测量为该金矿勘查提供了不同阶段的找矿信息,找矿效果显著。其中,利用水系沉积物测量在九仗沟矿区范围内圈定了11-丙-Au异常,利用土壤地球化学测量发现了九仗沟1-甲_(1)-Au-Ag-Pb-Cu-Hg-As-Bi-Ni异常,利用原生晕剖面微量元素峰值部位确定了F_(1)构造矿化蚀变带。通过总结该矿床地球化学异常特征和找矿标志,建立了勘查地球化学模式,为区域及矿区周边相同类型的金矿勘查提供理论指导。Jiuzhanggou gold deposit in Songxian County,Henan Province,is located in the northern section of the Manyu-Dianfang gold ore belt in the Xiong’ershan-Waifangshan ore concentration area.It is a typical largescale tectonic altered rock type gold deposit.Firstly,the prospecting target area was delineated by 1∶50000 stream sediment survey.Secondly,the mineralization enrichment site was determined by 1∶10000 soil geochemical survey.Finally,the tectonic fracture zone and mineralization intensity were identified by rock geochemical(primary halo)survey,and the relative denudation degree of orebody was predicted.The results show that geochemical measurements at different scales provide prospecting information at different stages for the exploration of the gold deposit.Among them,the stream sediment survey delineated the 11-C-Au anomaly in the Jiuzhanggou mining area.The soil geochemical survey found the 1-A_(1)-Au-Ag-Pb-Cu-Hg-As-Bi-Ni anomaly in Jiuzhanggou.The peak position of trace elements in the primary halo profile determined the mineralization alteration zone of F_(1) structure,and finally obvious prospecting results was achieved.By summarizing the geochemical anomaly characteristics and prospecting indicators of the deposit,an exploration geochemical model was established to provide theoretical guidance for the exploration of the same type of gold deposits in the region and around the mining area.

关 键 词：构造蚀变带 地球化学特征 找矿标志 勘查模式 找矿预测 九仗沟金矿 河南省 

分 类 号：P632[天文地球—地质矿产勘探]