内蒙古林东盆地航空伽马能谱异常特征及其铀成矿潜力分析  

Analysis of characteristics of aerial gamma spectrum anomaly and U metallogenetic potential in London basin,Inner Mongolia

作　　者：张恩[1,2,3] 卢辉雄 冯博[1,2,3] 王青 王诜[1,2,3] 程旭 ZHANG En;LU Huixiong;FENG Bo;WANG Qing;WANG Shen;CHENG Xu(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China;Key Lab.of Airborne Survey and Remote Sensing in Hebei Province,Shijiazhuang 050002,China;High resolution Earth Observation System Data Application Technique Support Center of Hebei Province,Shijiazhuang 050002,China;Geological Party No.243,CNNC,Chifeng 024006,Inner Mongolia,China)

机构地区：[1]核工业航测遥感中心,石家庄050002 [2]河北省航空探测与遥感技术重点实验室,石家庄050002 [3]高分辨率对地观测系统河北数据应用技术支持中心,石家庄050002 [4]核工业二四三大队,内蒙古赤峰024006

出　　处：《地质找矿论丛》2023年第3期269-276,共8页Contributions to Geology and Mineral Resources Research

基　　金：中国地质调查局项目“大兴安岭铀成矿带及周缘铀矿地质调查选区”(编号:DD20160129-09)资助。

摘　　要：林东盆地多期次火山岩浆活动强烈,铀成矿地质条件优越,受工作程度较低、异常线索不突出等因素影响,铀矿勘查进展缓慢。在区域铀成矿地质背景分析的基础上,针对火山岩型铀矿,对航空伽马能谱数据进行二次开发,采用异常“增量”构建参数模型,压制干扰信息,突出成矿相关的“后生”异常信息。通过对典型铀矿点伽马能谱特征的分析,构建了适宜于研究区铀矿找矿的航空伽马能谱异常标志为铀增量高值晕+Sm_(3)参数高值晕。依据异常叠加复合情况,结合铀成矿地质条件,优选了7处综合异常晕,其具有较好的找矿潜力。Lindon basin is strong in multi-stage volcanic magmatic activity and superior in U metallogenetic condition.However little progress is made here due to less geological and prospecting works and prominent anomaly clues.This paper analyzes the regional U metallogenic background and re-developed Gamma energetic spectrum data of volcanic type U mineralization to build parameters model by using the anomaly increment and suppress the interference information and highlight the epigenic information related to U mineralization.Gamma energetic data of typical U ore occurrences is analyzed and+Sm_(3)is determined as the U increment high value helo which is suitable to U ore prospecting in the basin.According to the overprinting of the outlined anomalies and U metallogenic and geological condition 7 integrated halos are asigned to be the potential prospecting targets.

关 键 词：航空伽马能谱异常 铀矿 成矿潜力分析 林东盆地 内蒙古 

分 类 号：P631[天文地球—地质矿产勘探] P619.14[天文地球—地质学]