利用航空伽马全谱数据估算土壤氡的应用研究  

Application Research on Estimating Soil Radon Concentration Using Airborne Gamma Spectrum Data

作　　者：李兵海 李怀渊[1] 石连成[1] 沈正新[1] 张翔[1] 赵丹[2] LI Binghai;LI Huaiyuan;SHI Liancheng;SHEN Zhengxin;ZHANG Xiang;ZHAO Dan(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang,Heibei 050002,China;Beijing Research Institute of Uranium Geology,Beijing 100029,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]核工业北京地质研究院,北京100029

出　　处：《铀矿地质》2025年第2期371-379,共9页Uranium Geology

基　　金：国家自然科学基金项目(编号:U2067204)资助。

摘　　要：为了研究利用航空伽马全谱数据估算土壤氡的方法及利用效果,进行了基于航空伽马全谱数据估算土壤氡的研究,根据航空伽马和土壤氡测量原理,建立了一套航空伽马全谱数据估算土壤氡的方法,并选择实验区进行实验,对比了估算土壤氡与实测土壤氡的异同,评价了估算效果。结果表明:估算氡可以快速得到大面积的土壤氡数据;在覆盖地层均一的情况下,估算氡与实测氡趋势基本一致,面积较大区域形态也基本一致,估算土壤氡信息更丰富,局部细节有差别,数值上也有差别;铀矿床、矿点基本均位于估算氡的高值区或较高区域;实测土壤氡值低于背景值的点,差值比均大于50%,高于背景值的点,差值比小于30%的占77%。高于背景值的地方,估算值比较准确,低于背景值的地方,估算值与实测值差距较大;故实测土壤氡和估算土壤氡略有差距,但不影响异常区的划定,对于后期的砂岩型铀矿预测有一定的参考价值,效果较好。In order to study the method and its utilization effect of estimating soil radon by airborne full gamma spectrum data,a study was conducted in Ba-Sai-Qi uranium mineralization belt of Erlian basin.According to the principles of airborne gamma and soil radon measurement,a set of methods for estimating soil radon by airborne full gamma spectrum data was established.The similarities and differences between estimated and measured soil radon were compared,and the estimation effect was evaluated.The results indicate that estimating radon can quickly obtain soil radon data with large scale.In the case of uniform coverage of strata,the estimated radon trend is basically consistent with the measured,and the morphology of concentration distribution in large areas is also basically consistent.The estimated soil radon provider more information than the measured but with differences in details and numerical values.Uranium deposits and mining sites are mostly located in high-value or high radon estimation areas,when the measured soil radon value is lower than the background,the estimated value difference is over 50%,while the measured soil radon value is higher than the background,77%the estimated values are within the 30%difference to the measured.That is,in areas above the background value,the estimated value is more accurate,while in areas below the background value,the difference between the estimated and the measured value is significant.Therefore,there is a slight difference between the actual measurement and the estimation of soil radon,but the difference does not affect the delineation of abnormal areas.In conclusion,the estimating soil radon by airborne full gamma full spectrum data has reference value for the prediction of sandstone type uranium deposits in the large area.

关 键 词：估算土壤氡 降噪 航空伽马能谱数据处理 应用效果 

分 类 号：P631[天文地球—地质矿产勘探]