综合物探测量在鹿井红盆地区铀矿勘查中的应用  

The application of comprehensive geophysical method to uranium exploration in Lujing Red Basin

作　　者：孟凡兴[1] 聂斌 邱崇涛[1] 何昕欣 

机构地区：[1]核工业航测遥感中心中核集团公司铀资源地球物理勘查技术中心重点实验室,河北石家庄050002 [2]核工业270研究所,江西南昌330200

出　　处：《物探与化探》2016年第1期21-26,共6页Geophysical and Geochemical Exploration

基　　金：中国核工业地质局基础地质专项(201019)

摘　　要：中新生代陆相红层与铀矿化具有密切的时空关系。在红层形成时期,发育了区域性铀成矿作用;红层的完整程度直接反映了铀矿保矿条件的好坏,可作为铀矿化的"指示标志"之一,因此,红盆地区地层的识别及下伏地质体的探查对于铀矿勘查工作的进一步开展具有重要意义。本文简要介绍了音频大地电磁测量和土壤氡测量的工作方法,结合华南鹿井地区丰州盆地的地质资料和岩石电阻率特征,利用音频大地电磁测量资料,查明了勘查区内的红层厚度、产状及其与下伏花岗岩体的接触关系以及隐伏断裂深部展布特征;利用土壤氡测量可提高断裂构造推断的可靠性,指示深部铀矿化信息。通过钻孔验证,推断结果基本反映了实际地质情况,对于深入开展铀矿找矿工作具有一定的指导作用。Uranium mineralization is closely associated with Mesozoic-Cenozoic continental red beds in time and space, and regional u- ranium mineralization was developed during the formation of red beds. Existing red beds can reflect indirectly uranium deposit under better or poor conditions, and hence red beds can act as an indicator of uranium mineralization. The methods of audio magnetotelluric survey （AMT） and soil radon measurement are introduced in the paper. Based on geological data and resistivity characteristics of rocks, the authors ascertained the thickness, occurrence and contact relations of the red layer and the deep characteristics of the con- cealed fault roughly by using AMT data. Through soil radon measurement, the reliability of the inferred fault is improved and uranium mineralization information is indicated. A comparison with the drilling data shows that the inferred results can reflect basically actual ge- ological situation and play a guiding role in uranium ore-searching in red basin area.

关 键 词：铀矿勘查 音频大地电磁测量 土壤氡测量 红层 鹿井 

分 类 号：P631[天文地球—地质矿产勘探]