荒漠浅覆盖区萤石矿定位预测技术研究  

Research on Location and Prediction Technology of Fluorite Deposits in Shallow Desert Coverage Area

作　　者：刘诚 唐卫东[1,2] 杨凯 李含[1,2] 贺景龙 姚川 李新斌 LIU Cheng;TANG Weidong;YANG Kai;LI Han;HE Jinglong;YAO Chuan;LI Xinbin(Xi’an Center of Mineral Resources Survey,China Geological Survey,Xi’an 710100,Shaanxi,China;Technology Innovation Center for Gold Ore Exploration,China Geological Survey,Xi’an 710100,Shaanxi,China;School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China)

机构地区：[1]中国地质调查局西安矿产资源调查中心,陕西西安710100 [2]中国地质调查局金矿勘查技术创新中心,陕西西安710100 [3]中国地质大学(北京)地球物理与信息技术学院,北京100083

出　　处：《西北地质》2024年第4期144-156,共13页Northwestern Geology

基　　金：陕西省自然科学基础研究计划项目(2023-JC-QN-0365);中国地质调查局项目(DD20243342、DD20243333、DD20211552)联合资助。

摘　　要：北山地区是中国西北部重要的萤石成矿带,区内成矿地质条件优越,但地处戈壁荒漠,受浅覆盖层影响,地表仅可观察到极少量露头,需开展综合地球物理研究为区域成矿潜力及覆盖区下方矿脉赋存空间进行定位预测研究。以北山成矿带东段花石头山地区为示范,采用高精度磁法、激电中梯、地面伽马能谱测量、便携式X射线荧光分析及音频大地电磁测深等技术手段进行综合探测,其中面积性激电和磁法工作可有效识别隐伏赋矿空间分布,地面伽马能谱测量、便携式X射线荧光分析约束赋矿空间的矿化异常,音频大地电磁测深构建了隐伏萤石矿赋存位置深部结构模型,并通过工程验证方法组合的有效性。本研究建立了综合地质-地球物理定位预测技术方法组合,可为北山成矿带及戈壁荒漠浅覆盖区萤石矿定位预测提供理论和技术支持。The Beishan region,located in the northwest of China,is a significant fluorite metallogenic belt.Despite favorable metallogenic geological conditions in the area,the Gobi Desert's shallow cover layers result in minimal outcrops at the surface.Therefore,comprehensive geophysical studies are necessary to explore the regional metallogenetic potentiality and locate mineral veins beneath the cover layers.An example of this exploration is the Huashitou area in the eastern segment of the Beishan metallogenic belt.A combination of high-precision magnetic,induced polarization-resistivity,ground gamma-ray spectrometry,portable X-ray fluorescence analysis,and audio-magnetotelluric(AMT)survey was used for comprehensive exploration.The area-based in-duced polarization and magnetic methods effectively identified the distribution of hidden mineral-bearing spaces,while ground gamma-ray spectrometry and portable X-ray fluorescence analysis constrained the mineral-ization anomalies of deposit spaces.The AMT survey established a deep structure model of the occurrence of concealed fluorite deposits,and its validity was evaluated through engineering verification methods.This study establishes a comprehensive geological-geophysical location prediction technique and method combination that can provide theoretical and technical support for the positioning and prediction of fluorite deposits in the Beis-han metallogenic belt and shallow cover areas in the Gobi Desert.

关 键 词：隐伏萤石矿 综合物探方法 戈壁荒漠 浅覆盖区 北山成矿带 

分 类 号：P631[天文地球—地质矿产勘探]