摘要
卡房钼矿区位于北秦岭构造带与华北陆块南缘结合部位,隶属于秦岭—大别成矿省东秦岭多金属成矿带。结合矿区地质矿产、物探、化探等成果,对区内地质特质及找矿潜力进行了分析。结果表明:卡房地区的老君山岩体附近存在高温元素(W、Mo、Bi)—中低温元素(Cu、Pb、Zn)—低温(Au、As、Ag)元素环带状异常组合;矿区高磁异常值为-300~120 nT,矿区南部存在一正、负值异常的梯度带;利用大地电磁测深(EH4)测得在矿区洛沟一带的地表以浅500 m处的电阻率对数值为0.8~1.2,推断为矿化所致,并通过钻孔验证发现了含矿岩体;通过系统的地质矿产工作在矿区发现了5条赋存于大理岩和石英片岩中的钼矿体。在此基础上,进一步在卡房地区圈出了2处钼找矿靶区并对其开展了成矿预测,认为靶区内具有较大的找矿潜力,值得进一步开展工作。分析结果为研究老君山岩体与钼矿床的成矿作用提供了参考。
The Kafang Molybdenum mining area is located in the joint part of the North Qinling tectonic belt and the southern margin of the North China continental block and belongs to the polymetallic metallogenic belt of the East QinlingDabei Metallogenic Province.Based on the geological,mineral,geophysical and geochemical data in the mining area,the geological characteristics and prospecting potential of the mining area are studied.The results show that there is an anomalous combination of high-temperature elements(W,Mo,Bi)-medium and low temperature elements(Cu,Pb,Zn)-low temperature elements(Au,As,Ag)in the vicinity of the Laojunshan rock mass in the Kafang area.The high magnetic outliers in the mining area ranged from-300 to 120 nT,and there is a gradient zone with positive and negative anomalies in the south of the mining area.The resistivity logarithm of the surface in Luogou area of the mining area is measured as 0.8 ~ 1.2 at a depth of 500 m by magnetotelluric sounding(EH4),which is inferred to be caused by mineralization,and the ore-bearing rock mass is found through the verification of drilling.Through systematic geological and mineral work,five molybdenum ore bodies in marble and quartz schist are found in the mining area.On this basis,two tungsten and molybdenum prospecting target areas are delineated in the Karfang area and metallogenic prediction is carried out.It is considered that the target areas have great prospecting potential and are worth further work.The above analysis results can provide certain reference for studying the metallogenic of Laojunshan rock mass and molybdenum deposit.
作者
谭和勇
叶萍
孙丹
彭江涛
苏永峰
TAN Heyong;YE Ping;SUN Dan;PENG Jiangtao;SU Yongfeng(Henan Institute of Geological Survey,Zhengzhou 450001,China;Henan Key Laboratory for Metal Mineral Ore-forming Geological Process and Utilization of Resource,Zhengzhou 450001,China;Henan Geological Science Research Institute,Zhengzhou 450001,China)
出处
《金属矿山》
CAS
北大核心
2021年第9期152-160,共9页
Metal Mine
基金
中国地质调查局基金项目(编号:121201004000160901-18)。
关键词
钼矿
梯度带
大地电磁测深
找矿靶区
成矿预测
Mo deposit
gradient belt
magnetotelluric sounding method
prospecting target area
metallogenic prediction
