摘要
江苏南京高台地区位于宁芜北段东带,地表及深部铁和铜金属矿化强烈,钻孔揭露黄铜矿(化)体2处,分别赋存于象山群和黄马青组砂岩的石英脉中,Cu品位分别为1.11%和0.64%,围岩蚀变强烈,且受地层和断裂控制明显,下伏岩体为辉石闪长玢岩。常量、微量元素及稀土元素地球化学特征表明,该区高Al、Fe,富集K、Rb、Th、U等不相容元素,亏损Nb、Ta和Ti等高场强元素。稀土元素球粒陨石标准化分布型式图和微量元素原始地幔标准化蛛网图表明,高台地区与区域上的成矿岩体具有相似的地球化学特征,显示该地区具有较大的成矿潜力。综上,高台地区具玢岩铁矿及中低温热液石英脉型铜矿的找矿前景。
Located in the east belt of northern Nanjing-Wuhu area,the Gaotai area in Nanjing of Jiangsu Province has intense iron-copper polymetallic mineralization both in surface and deep regions.Its two mineralized copper bodies revealed by drilling occurred in quartz veins in sandstone of the Xiangshan Group and the Huangmaqing Group,the grade of Cu being 1.11%and 0.64%respectively.Both of them had intense alteration of wall rocks and were controlled by strata and faults obviously.The underlying rock is pyroxene diorite porphyrite.Major elements,REE(rare earth elements)and trace elements geochemistry reflected that they are high in Al and Fe and enriched in the incompatible trace elements including K,Rb,Th,and U,and depleted in high field-strength elements including Nb,Ta,and Ti.The diagram of REE chondrite-normalized distribution patterns and the primitive mantle normalized spider diagram of trace elements indicated that their geochemical feature is similar to that of metallogenetic rock body of regional scale,which also indicates that the study are is of great mineralization potentials.In general,Gaotai area has the prospecting potential of porphyrite iron ore deposit and copper deposit of mid-low hydrothermal quartz-vein type.
作者
费利东
邓辉
白涛
赵存法
谢小晶
刘军
陈雪
Fe Lidong;Deng Hui;Bai Tao;Zhao Cunfa;Xie Xiaojing;Liu Jun;Chen Xue(East China Mineral Exploration and Development Bureau,Nanjing 210007,Jiangsu,China)
出处
《地质学刊》
CAS
2020年第1期93-101,共9页
Journal of Geology
基金
国土资源部老矿山深部及外围找矿项目“江苏省宁芜北段东带矿山密集区深部铁矿战略性勘查”(1212011220681)
江苏省地质勘查基金项目“江苏省南京市江宁区高台寺铁铜矿普查”(苏财建[2012]549号)。
关键词
宁芜北段东带
辉石闪长玢岩
玢岩铁矿
中低温热液石英脉型
南京高台地区
east belt of northern Nanjing-Wuhu area
pyroxene diorite porphyrite
porphyrite iron deposit
mid-low hydrothermal quartz-vein type
Gaotai area in Nanjing
