相山火山盆地深部铀矿放射性地球物理信息提取  

Radioactive geophysical information extraction from deep uranium deposits in Xingshan volcanic basin

作　　者：李必红[1] 程纪星[1] 刘祜[1] 杨龙泉[1] 张儒亮[1] 陈聪[1] 吴国东[1] LI Bi-hong;CHENG Ji-xing;LIU Hu;YANG Long-quan;ZHANG Ru-liang;CHEN Cong;WU Guo-dong(Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业北京地质研究院,北京100029

出　　处：《地球物理学进展》2018年第6期2368-2373,共6页Progress in Geophysics

摘　　要：深部铀成矿信息识别和提取是当前铀矿勘查领域的热点之一.放射性地球物理测量是一种重要的深部铀矿勘查方法,但是,受地表强干扰信息的影响,深部铀成矿信息往往被表层信息所掩盖,其找矿示踪效果不明显.为了提高深部铀矿放射性信息识别准确率,本论文在前人研究成果的基础上,从深部铀成矿放射性地球物理信息形成机理入手,结合相山火山盆地已知深部铀矿地质特征,利用相山火山盆地近几年实测的放射性地球物理数据,开展了与伽马能谱和土壤氡两种放射性地球物理相关的铀差量、趋势面分析、分形、方向导数以及布尔逻辑等数据处理方法的应用研究.采用这些方法提取了相山火山盆地深部铀成矿相关的放射性地球物理信息,所提取的放射性地球物理异常与已知深部铀矿吻合.表明这些针对伽马能谱和土壤氡气测量数据的数据处理方法,可有效压制表层干扰,突出了深部铀成矿放射性信息异常,因此,发展放射性地球物理深部铀成矿信息提取技术是实现深部找矿的一种可行途径.The identification and extraction of deep uranium mineralization information is one of the hot spots in the field of uranium exploration. Radioactive geophysical survey is one of the important deep uranium exploration, which is affected by strong surface interference information, and deep uranium mineralization information is often covered by surface information, because of these reasons, the tracing effect of mineral exploration is not obvious. In order to improve the accuracy of radioactive information recognition in deep uranium deposits, based on the research results of predecessors, this dissertation starts with the formation mechanism of radiogenic geophysical information of deep uranium mineralization, and combines the geologic characteristics of deep uranium deposits known in the Xiangshan volcanic basin, by using the radioactive geophysics data in recent years, applied research on data processing methods was carried out about uranium difference, fractal, trend analysis of ground gamma-ray spectrum and directional derivative of soil radon and Boolean logic. These methods are used to extract the radioactive geophysical information related to deep uranium mineralization in the Xiangshan volcanic basin, the extracted radioactive geophysical anomalies are in agreement with the known deep uranium deposits completely. The application results are indicated that these data processing methods based on gamma-ray spectrum and soil radon measurement data can effectively suppress the surface interference and highlight the radioactive information anomalies of deep uranium mineralization, and the development of deep uranium mineralization information extraction technology is a feasible approach for radioactive geophysical prospecting in the field of deep uranium deposits exploration.

关 键 词：放射性地球物理信息 深部铀矿 相山火山盆地 伽马能谱 土壤氡 

分 类 号：P631[天文地球—地质矿产勘探]