砂岩型铀矿找矿中土壤氢气测量方法影响因素研究  

Study on the Influencing Factors of Soil Hydrogen Measurement for the Exploration of Sandstone-type Uranium Deposit

作　　者：朱琳[1,2,3] 伍显红 赵丛[1,2,3] 张翔 张伟[1,2,3] ZHU Lin;WU Xianhong;ZHAO Cong;ZHANG Xiang;ZHANG Wei(Nuclear Industry Aerial Surveying and Remote Sensing Center,Shijiazhuang,Hebei 050002,China;Hebei Provincial Key Laboratory of Aerospace Exploration and Remote Sensing Technology,Shijiazhuang,Hebei 050002,China;Key Laboratory of Uranium Geophysical Exploration Technology Center of China National Nuclear Corporation,Shijiazhuang,Hebei 050002,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]河北省航空探测与遥感技术重点实验室,河北石家庄050002 [3]中核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：《铀矿地质》2024年第5期992-1001,共10页Uranium Geology

基　　金：核工业航测遥感中心自主科研项目(编号:2023-12)资助。

摘　　要：放射性元素衰变过程中水辐解会产生大量氢气,而氢气质量轻、迁移快的特点使其在地表就能够被探测到异常,进而能够指导铀矿找矿工作。在已知的巴音戈壁盆地塔木素砂岩型铀矿床、二连盆地巴润砂岩型铀矿床和图门勘探区开展了土壤氢气测量试验研究,从测孔深度、孔闲置时间、测量点距、气体动态平衡情况、最佳采集时间等方面分析了土壤氢气测量方法对铀矿勘查的影响,经与已知地质资料和钻孔资料对比分析得出结论:铀矿化程度、厚度及埋深情况与地表氢气浓度异常呈正相关关系,矿化程度越高、厚度越大、埋深越浅则土壤氢气浓度越高;断裂构造上方均有较好的土壤氢气异常显示,且土壤氢气浓度异常受断裂宽度、断裂含矿或不含矿等因素影响较大;总结了一套有效可行的土壤氢浓度采集方案和工作方法,为铀矿找矿工作提供了新思路和新方法。In the process of radioactive element decay,water radiolysis will produce a large amount of hydrogen.The characteristics of light weight and fast migration of hydrogen gas make it detectable on the surface of the earth.Therefore,it can guide the exploration of uranium deposits.Soil hydrogen measurement experimental research was conducted in the known Tamasu sandstone-type uranium deposit of Bayingogeben Basin,Barun sandstone-type uranium deposit in Erlian Basin and the Tumen exploration area.The influencing factors of soil hydrogen measurement method for uranium deposits were analyzed from the depth of borehole,hole standby time,measurement point spapce,gas dynamic balance,optimal collection time,etc.By comparing and analyzing with known geological data and borehole data,the degree of uranium mineralization,thickness and buried depth were found positively related to the abnormal concentration of surface hydrogen gas,the higher the degree of mineralization,the larger the thickness,and the shallower the buried depth,the higher the soil hydrogen concentration;good soil hydrogen anomalies were examined above the fault structure,and the soil hydrogen concentration anomaly was greatly affected by factors such as fault width,the encountering mineralization level of the fault.A set of effective and feasible soil hydrogen concentration collection scheme and working procedure were summarized to provide new ideas and methods for uranium exploration.

关 键 词：砂岩型铀矿 土壤氢气测量 影响因素 浓度 

分 类 号：P598[天文地球—地球化学]