航空伽玛能谱数据在突泉地区铀成矿预测中的应用  

Application of airborne gammaenergy spectral data to uranium metallogenic prognosis in Tuquan area

作　　者：张恩[1,2] 段明 卢辉雄[1,2] 冯博[1] 曹秋义[1,2] 杨彦超[1] ZHANG En;DUAN Ming;LU Hui-xiong;FENG Bo;CAO Qiu-yi;YANG Yan-chao(Airborne Survey and RemoteSensing Center of Nuclear Industry,Shijiazhuang 050002;Faculty of Earth Sciences,East China Institute of Technology,Nanchang 330013;Tianjin Center of China Geological Survey,Tianjin 300170)

机构地区：[1]核工业航测遥感中心,石家庄050002 [2]东华理工大学地球科学学院,南昌330013 [3]中国地质调查局天津地质调查中心,天津300170

出　　处：《矿产勘查》2019年第7期1624-1631,共8页Mineral Exploration

基　　金：中国地质调查局项目(编号:DD20160129-09)资助

摘　　要：受森林分布广、覆盖厚及矿体隐伏等因素制约,大兴安岭成矿带突泉地区铀找矿进展缓慢。航空伽玛能谱数据蕴含有丰富的铀矿化信息,除地表矿化信息外,亦含有部分深部铀矿化弱信息。在典型铀矿点地质特征及伽玛能谱特征分析的基础上,利用K、U、Th元素含量之间的地球化学特征差异,构建了3个航放参数模型(U高场、△U高值晕、N高值晕),增强航放微弱异常信息。在航放异常信息提取、优选的基础上,结合地质、化探等找矿有利信息,预测铀成矿远景区9处。其中4处远景区成矿地质条件优越,异常线索丰富,尚属铀矿空白区,在进一步工作中应引起重视。Constrained by factors such as wide forest distribution,thick cover and concealed ore body,the prospecting of uranium deposits in the Tuquan area of the Daxing’anling metallogenic belt is slow.The aviation gamma energy spectrum data contains rich information on uranium mineralization.In addition to surface information,it also contains some weak information on deep uranium mineralization.Based on the analysis of metallogenic geological characteristics and gamma-ray spectrum characteristics of typical uranium deposits,three airborne radiation parameter models(U high field,△U high value halo,N high value halo)were constructed to enhance the weak anomaly information of airborne radiation.On the basis of extracting and optimizing the information of aerial radioactivity anomaly and combining with favorable information of Geology and geochemical prospecting,nine uranium metallogenic prospects are predicted.Among them,four prospective areas have superior geological conditions and abundant anomaly clues.They are still blank areas of uranium deposits,which should be paid more attention in further work.

关 键 词：航空伽玛能谱 铀矿 成矿预测 微弱信息增强 突泉地区 

分 类 号：P631[天文地球—地质矿产勘探]