摘要
黔西北铅锌成矿区是贵州省重要的铅锌产地之一,区内发现的某超大型铅锌矿深部及外围被认为仍具较大找矿潜力。随着埋深加大,地质条件更复杂,通过地球物理方法探查直接或间接的矿致异常愈加被认可。为研究三维激电方法在黔西北铅锌成矿区的勘查效果,首先在典型矿床开展了方法有效性及装置参数试验,结果显示梯度四极加三极装置联合反演显示的高极化率(17~20 mV/V)、低电阻率(158~251Ω·m)与已知铅锌矿体空间位置对应较好,然后应用到外围空白区,圈定了高极化、低电阻激电异常,经钻孔验证为含黄铁矿及铅锌矿(化)地质体。表明通过低电阻率高极化率圈定含黄铁矿物地质体异常,结合地质分析,间接指示铅锌矿体空间位置是本区三维激电方法应用的思路,对地区同类型铅锌矿地球物理勘探具有参考意义。
The lead-zinc-coated area of Northwest Guizhou is one of the important lead-zinc producing areas of Guizhou Province.The deep and peripherals of pig arch ponds found in the area are considered to have a large amount of mineral potential.As the burial depth increases,the geological conditions become more complicated,the direct or indirect ore through the physical method of the earth will be ever more widely recognized.In order to explore the effect of the three-dimensional induced polarization method in the northwestern Guizhou lead-zinc-forming area,the effectiveness and installation parameter test of the typical mineral bed are first carried out in the typical mineral bed,results show that the high-pole rate(17~20 mV/V),the low resistance(158~251Ω·m)of the symmetry and triode device compared with the known lead-zinc ore body space position.Later,high polarization and low-resistance excitement are applied to the peripheral blank zone.The drilling verifies a brown iron ore,pyroneite and accompanying lead-zinc ore geological body,which indicates the location of the space-containing mineral abnormalities and indirectly indicates the spatial position of lead-zinc ore in this area as the application of the three dimensional induced polarization method in this area,which has reference for geophysical exploration of the same type of lead-zinc ore in the area.
作者
张德实
何帅
杨炳南
谢小峰
沈小庆
Zhang Deshi;He Shuai;Yang Bingnan;Xie Xiaofeng;Shen Xiaoqing(Geologic Party 103,Guizhou Bureau of Geology&Mineral Exploration and Development,Tongren Guizhou 554300,China;Engineering Technology Innovation Center of Mineral Resources Explorations in Bedrock Zones,Ministry of Natural Resources,Guiyang Guizhou 550081,China)
出处
《工程地球物理学报》
2024年第5期866-875,共10页
Chinese Journal of Engineering Geophysics
基金
贵州省科技计划项目(编号:黔科合支撑[2023]一般172)
贵州省地矿局创新人才团队(编号:黔地矿科合[2023]TD001)
贵州省地矿局创新人才团队(编号:黔地矿科合[2023]TD002)。
关键词
三维激电法
黔西北
铅锌矿
黄铁矿
极化率
three dimensional induced polarization method
northwest of Guizhou
lead-zinc mine
polarization rate
