摘要
为了筛选铀成矿有利地段,探索克山地区铀成矿前景,通过开展1:5万高精度航空放射性测量异常查证工作,并结合收集整理的相关地质资料,从航放异常特征、地质特征、能谱特征及土壤氡浓度特征等几个角度,对克山地区进行铀成矿条件分析。结果表明:该地区靠近小兴安岭地区,且盆地盖层具有较高的初始铀含量,铀源条件优良;地层宽缓,断裂发育,是深部烃类向上运移的通道,地表局部剥蚀强烈,形成构造天窗,成矿有利砂体大规模发育,并伴有后生改造作用和铀富集。克山地区航放异常集中分布,航磁推断构造发育,深部放射性信息突出,为砂岩型铀矿找矿提供了有益线索,为圈定找矿有利区段提供了依据。
In order to screen the favorable area of uranium mineralization and explore the prospect of uranium deposit in Keshan area,1:50000 aviation radioactiue measurement anomaly verification work was conducted with the relevant geological data,the uranium metallogenic conditions in Keshan area was analyzed from the aspects of aerial radioactivity characteristics,geological characteristics,energy spectrum characteristics and soil radon concentration characteristics.The results show that the area is close to the Xiaoxing’anling area,and the basin caprock has a high initial uranium content and excellent uranium source conditions.The strata are widely distributed and gently dripped,and the developed faults can be acted as the channel for deep hydrocarbons migration.The local erosion of the surface is strong and forming a structural skylight.The favorable sand bodies for mineralization developed on a large scale,accompanied by epigenetic transformation and uranium enrichment.The aerial magnetic anomalies concentrated in Keshan area,and the inferred structures are verified by aerial magnetic survey.The deep radioactive information is prominent,which provides useful clues for the exploration of sandstone-type uranium deposits and the identification of favorable exploration sections.
作者
牛家骥
张翔
张仁红
卢亚运
NIU Jiaji;ZHANG Xiang;ZHANG Renhong;LU Yayun(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China;China Nuclear of Uranium Resources Geophysical Exploration Technology Center(Key Laboratory),China Nuclear Industry Group Company,Shijiazhuang 050002,China;Key Laboratory of Aeronautical Detection and Remote Sensing Technology in Hebei Province,Center(Key Laboratory),Group Company,Shijiazhuang 050002,China)
出处
《世界核地质科学》
CAS
2024年第2期334-342,共9页
World Nuclear Geoscience
基金
中国核工业地质局“松辽盆地东部地区1:5万航空物探调查项目”(编号:202141-1)资助。
关键词
克山地区
异常特征
剥蚀天窗
铀成矿条件
Keshan area
abnormal characteristics
denuded skylight
uranium metallogenic conditions
