摘要
内蒙古某斑岩型铜多金属矿位于华北兴蒙造山带东段多个地块相互作用带和古缝合带边缘,区内地质体不连续增加了地质找矿难度。结合相关地质勘探成果,在分析区域地质特征、矿区地质特征的基础上,首先利用高精度磁测法和激电中梯法圈定了区内深部矿体的赋存范围,并推测出深部隐伏控矿断裂特征;然后结合可控源音频大地电磁测深法(Controlled source audio-frequency magnetotelluric sounding method,CSAMT)反演的电阻率分布特征,用控矿构造解析法对区内浅表构造进行了分析;最后经地质-地球物理综合约束,并依据斑岩型铜钼多金属矿的富集与分布受控于"地壳浅表构造和斑岩体内部物质与能量的交换及其深层动力过程"的规律,推测出控矿斑岩体及赋矿断裂构造的产出位置、形态,为该区预测深部矿体富集带提供了依据。
Taking a porphyry copper polymetallic deposit in Inner Mongolia as the study example,it is located in the multiple plot interaction belt and the edge of paleo-suture zone,eastern section of Xing'an Mongolian orogenic belt in north China.Due to the distribution of discontinuous of the geologic bodies in the area,the difficulty of geological prospecting in the area is increased to a certain degree.Combing with some related geological prospecting results of the area,the regional geological characteristics,geological characteristics of the mining area are analyzed in detail,based on the above analysis results,firstly,the occurrence scope of the deep ore-bodies in the area are delineated by using high precision magnetic method and IP method survey method,and the characteristics of the concealed ore-controlling fracture in the deep area is inferred; then,combing with the distribution characteristics of CSAMT(Controlled source audiofrequency magnetotelluric sounding method) inversion resistivity,the superficial structures is analyzed by using the ore-controlling tectonic analytical method; finally,based on the comprehensive constraints of geological and geophysical and the enrichment and distribution of porphyry Cu-Mo polymetallic deposit are controlled by the rule of shallow structure in crust and internal material and energy exchange within porphyry and deep dynamics process,the output location and shape of ore-controlling porphyry bodies and ore-bearing fracture structure.The above study results related to the deep prospecting of the porphyry copper polymetallic in Inner Mongolia can provide some reliable basises for the further prospecting work in the area.
出处
《现代矿业》
CAS
2017年第1期1-7,18,共8页
Modern Mining
基金
国家自然科学基金项目(编号:41504063)
中国地质科学院基本科研业务经费项目(编号:AS2016J09)
中国地质调查局地质调查项目(编号:1212011120202)
关键词
深部找矿
斑岩型铜多金属矿床
地质特征
隐伏矿体
控矿因素
地质-地球物理综合约束
Deep prospecting
Porphyry copper polymetallic deposit
Geological characteristics
Concealed ore-body
Ore-controlling factor
Comprehensive constraints of geological and geophysical