综合物探方法在桂北地区铀矿勘查中的应用  

Application effect of comprehensive geophysical prospecting methods on the exploration of uranium deposit in North Guangxi

作　　者：焦智伟 王亚飞 艾虎[1,2] 孔志召 汪来[1,2] JIAO Zhiwei;WANG Yafei;AI Hu;KONG Zhizhao;WANG Lai(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,Hebei,China;CNNC Key Laboratory for Geophysical Exploration Technology Center of Uranium Resource,Shijiazhuang 050002,Hebei,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核集团铀资源地球物理勘查技术中心(重点实验室),河北石家庄050002

出　　处：《矿产与地质》2021年第5期923-932,946,共11页Mineral Resources and Geology

基　　金：中国核工业地质局“广西全州县南宅及大福源地区物探测量”(编号:201228)项目资助。

摘　　要：随着深部成矿理论成果的不断突破,开展第二富集带(地下深度500~1000 m)铀矿资源的勘查工作,是今后铀矿产资源找矿的主要方向之一。碳硅泥岩型铀矿床是我国主要的铀矿床类型之一,矿体的空间产出位置受到岩性和断裂构造控制。根据岩矿石物化特性差异,结合区域成矿地质规律,合理选择综合物探方法组合可快速有效地查明控矿岩层和控矿构造位置。在桂北某勘查区开展了地面高精度磁测、音频大地电磁测量和^(210)Po测量等物探找矿方法应用,结合岩矿石物化特征、^(210)Po异常分布范围,划分了不同岩性单元界线并勾勒了控矿构造形迹,对含矿岩石和控矿构造深部特征进行了客观的解释与推断。同时,在某铀矿勘查区预测了成矿有利地段,其中铀矿勘查工作取得了较好的效果,可以为相关地区的铀矿找矿勘查工作提供参考。With the continuous breakthrough of the theory of deep mineralization,the exploration of the second enrichment zone of uranium mineral resources(500-1000 m underground)is one of the main directions for uranium deposit prospecting in the future.Carbon-silicon mudstone type uranium deposit is one type of the main uranium deposits in China.The orebody is relatively controlled by stratum lithology and fault structure.According to the difference of rock and ore physical properties,combined with geological metallogenic regularity in the regional,the reasonable selection of comprehensive geophysical exploration methods can be quickly and effectively used to identify the spatial position of ore-controlling strata and ore-controlling structures.At a prospecting area of North Guangxi,ground high precision magnetic survey,audio-frequency magnetotelluric survey and ground ^(210)Po radioactivity survey are carried out,combined with the feature of rock and ore properties and ^(210)Po anomaly distribution characteristics,the boundary of different lithological units is divided,and the spatial location and trace of structures are generally outlined.The objective explanation is proposed for the deep characteristics of ore-controlling stratum lithology and ore-controlling structure.The favorable area for uranium deposit is predicted.There is a good result of the uranium deposit exploration in the study area.It can also provide a reference for uranium deposit exploration in the relative areas.

关 键 词：铀矿资源 综合物探方法 地面高精度磁测 音频大地电磁测量 ^(210)Po测量 桂北地区 

分 类 号：P631[天文地球—地质矿产勘探]