摘要
【研究目的】义盛店铀多金属矿(化)体赋存于西干沟破火山机构附近的晚侏罗世满克头鄂博期次火山岩体中,主要受NW-NNW向断裂构造与次流纹岩体内隐爆角砾岩带的结合部位控制,研究并建立该矿床综合信息找矿模型对指导成矿带找矿意义重大。【研究方法】本文在研究该地区铀成矿地质条件,成矿地质体、成矿构造与成矿结构面、成矿作用特征标志的基础上,结合矿区土壤地球化学特征和激电、伽马能谱、活性炭及静电α异常特征信息开展了系统综合研究工作。【研究结果】通过研究建立了矿区地质找矿模式,归纳并总结了矿区成矿主要受火山构造控制和土壤地球化学异常区与低电阻率高极化体异常及具有深穿透放射性形成的几何形态异常等物化探找矿标志,构建了该区地质-地球化学-地球物理“三位一体”的综合信息找矿模型。【结论】研究认为在义盛店矿区断裂破碎带、次火山岩接触带与隐爆角砾岩构造的叠加部位,地球化学异常与地球物理异常区相吻合地段,存在形成中-大型铀多金属矿床的潜力,并应用模型指导找矿取得了新突破。
This paper is the result of geological prospecting model and its application.[Objective]The Yishengdian uranium polymetallic deposit(mineralization)is located in the Late Jurassic Manketou Obo subvolcanic rock mass near the Xigangou volcanic mechanism,mainly controlled by the combination of NW-NNW trending fault structures and the hidden explosive breccia belt within the subrhyolite rock mass.The study and establishment of a comprehensive information exploration model for this deposit is of great significance in guiding the exploration of mineralization zones.[Methods]On the basis of studying the geological conditions,ore-forming bodies,ore-forming structures and structural planes,and ore-forming process characteristics of uranium mineralization in the region,this article conducted a systematic and comprehensive research work by combining the soil geochemical characteristics of the mining area with information on induced polarization,gamma energy spectrum,activated carbon,and electrostatic alpha anomalies.[Results]A geological exploration model for the mining area was established through research,and the main physical and chemical exploration indicators for mineralization in the mining area were summarized and summarized,including volcanic structure control,soil geochemical anomaly areas,low resistivity high polarization body anomalies,and geometric shape anomalies formed by deep penetrating radioactivity.A comprehensive information exploration model of geology geochemistry geophysics"trinity"was constructed for the mining area.[Conclusions]The study suggests that there is potential for the formation of medium to large uranium polymetallic deposits in the overlapping areas of fault fracture zones,subvolcanic rock contact zones,and cryptoexplosive breccia structures in the Yishengdian mining area,where geochemical and geophysical anomalies coincide.New breakthroughs have been made in using models to guide mineral exploration.
作者
王建青
刘洋
闫国强
于达
刘钧沅
徐如磊
蔡童
张晓鹏
WANG Jianqing;LIU Yang;YAN Guoqiang;YU Da;LIU Junyuan;XU Rulei;CAI Tong;ZHANG Xiaopeng(Tianjin North China Geological Exploration General Institute,Tianjin 300170,China;Tianjin North China Geological Exploration Bureau Nuclear Industry 247 Brigade,Tianjin 301800,China;Tianjin Center,China Geological Survey(North China Center of Geoscience Innovation),Tianjin 300170,China)
出处
《华北地质》
2024年第3期46-53,73,共9页
North China Geology
基金
中国地质调查局项目“河北省小河子矿集区深部找矿预测(DD2019057014)”
“内蒙古正蓝旗地区铀矿地质调查(DD20160129-06)”
“河北沽源吉黄营子地区铀矿地质调查(DD20160129-07)”。
关键词
义盛店
铀多金属矿
隐爆角砾岩
找矿模型
Yishengdian
Uranium polymetallic
cryptoexplosive breccia
prospecting model
