摘要
湖北省大冶市石头咀铜铁矿床位于长江中下游成矿带西部的鄂东南矿集区中部,是典型的矽卡岩型铜铁矿床,矿体赋存于三叠系碳酸盐岩与石英闪长岩接触带,接触带与破碎带重合处对成矿最有利。主矿体倾向北东,产状较陡,其深部矿体存在“台阶状”分布规律,采用“迭代法”对矿区12个钻孔589件原生晕样品进行分析总结,计算并归纳石头咀矿床元素的背景值和异常下限,初步确定石头咀矿区成矿指示元素为Cu、Au、Ag、Zn,近矿指示元素为Ba、Mo、Co、Ni,前缘指示元素为As、Sb、Pb。根据钻孔原生晕特征及钻探成果,认为石头咀矿区深部还存在较厚大矿体,提出将矿区北东部对原有矿体的走倾向追索作为下一步找矿方向,将矿区北部接触带作为远景评价区,为该区深部找矿勘查及成矿研究提供新的理论依据。
The Shitouzui copper-iron deposit in Daye,Hubei Province which located in the central part of the southeast Hubei mining area is a typical skarn copper-iron deposit.Its orebodies exist in the contact zone between Triassic carbonate rock and quartz diorite.The compound position of the contact zone and the fracture zone is the most favorable for mineralization.The main ore body dips to north-east with a steep attitude deep and the deep orebody has the rule of“step shape”distribution.In this paper,589 primary halo samples from 12 boreholes in the mining area are analyzed and summarized using“iterative method”,from which the background value and the threshold of the elements are calculated.Based on the above,the ore-forming indicator elements in Shitouzui deposit was initially defined as Cu,Au,Ag and Zn,the near ore indicator element as Ba,Mo,Co and Ni and the leading-edge indicator element as As,Sb and Pb.According to the primary halo characteristics and the drilling results,it is holds that there are still large and thick ore bodies in the deep part of the Shitouzui mine area and proposed that the next prospecting direction should be recourse along the strike and tendency of the original ore body in the north-east part of the mining area.Meanwhile,taking the northern contact zone of the mining area as the prospective evaluation area,which provides a new theoretical basis for deep prospecting and metallogenic research in this area.
作者
王磊
杨伟卫
蔡恒安
宋玉龙
刘孟合
程俊鑫
孙达
Wang Lei;Yang Weiwei;Cai Hengan;Song Yulong;Liu Menghe;Cheng Junxin;Sun Da(First Geological Brigade of Hubei Geological Bureau,Daye,Hubei 435100)
出处
《资源环境与工程》
2020年第3期324-329,共6页
Resources Environment & Engineering
基金
湖北省地质局2019年度科技项目《鄂东南地区成矿作用综合研究与深部找矿突破》(项目编号:KJ2019-5)。
关键词
地质特征
原生晕地球化学
深部找矿预测
石头咀
geological characteristics
primary halo geochemistry
deep prospecting prediction
Shitouzui
