松辽盆地东南部铀成矿要素的重磁异常响应研究  

Aeromagnetic and Gravitational Anomaly and Its Response on the Factors of Uranium Mineralization in the Southeast Area of Songliao Basin

作　　者：刘燕戌 李文勇 周婷[2] 余学中 路文芬 曹安琪 杨冬红 王立杰 LIU Yanxu;LI Wenyong;ZHOU Ting;YU Xuezhong;LU Wenfen;CAO Anqi;YANG Donghong;WANG Lijie(China Aero Geophysical Survey and Remote Sensing Center for Nature Resources,Beijing 100083,China;Tianjin University,Tianjin 301636,China;International Centre of Geoscience Research and Education in Northeast Asia,Jilin University,Changchun Jilin 130026,China;Oil and Gas Engineering Research Institute of Jilin Oilfield Company,Jilin Jilin 138000,China)

机构地区：[1]中国自然资源航空物探遥感中心,北京100083 [2]天津大学,天津301636 [3]吉林大学东北亚国际地学研究与教学中心,吉林长春130026 [4]吉林油田公司油气工程研究院,吉林吉林138000

出　　处：《铀矿地质》2021年第5期944-958,共15页Uranium Geology

基　　金：中国地质调查局项目“松辽盆地及外围航空物探调查”(编号:DD20190028);“青藏高原典型区冻土与地下水分布航空物探调查”(编号DD20211396)联合资助。

摘　　要：在总结前人工作的基础上,基于松辽盆地东南部航磁、重力资料,尝试利用重磁异常综合解释铀成矿的地质控制因素(如断裂构造、背斜构造、岩浆岩体等),为重磁学与铀矿勘查学交叉学科前缘创新方向提供思路。结果表明:(1)从平面位置上看,重磁异常梯级带附近及其交汇部位、局部重力高轴部与其旁侧重磁异常梯级带之间的区域,多为铀矿化(异常)点(孔)密集分布区;(2)从空间位置上看,利用重磁资料可以判断深部是否具有含油气的有利局部构造、浅部是否存在寻找构造天窗的有利部位、深部与浅部之间是否存在还原性气体的运移通道;(3)从成矿条件上看,利用重磁资料可以圈定酸性侵入岩和中酸性火山岩(尤其是隐伏岩体)分布范围,从而判断铀源位置;(4)分析与铀成矿要素响应度较高的重磁异常特征,总结重磁找矿标志,在充分结合铀矿化(异常)资料的基础上,共圈定铀成矿预测区3处及其他有利成矿地段3处。Based on the previous work,the aeromagnetic and gravitational data from the southeast area in Songliao basin were used tentatively to jointly interpret the geological controlling factors(such as fracture,anticline,magmatic rock,etc.)for uranium mineralization and four new outcomes were collected:(1)In the plane,uranium mineralization and anomalies or boreholes are mostly concentrated in the area near the gradient belt or the intersection of the gravitational and magnetical anomaly belts,the axes of high-amplitude local gravity anomalies and its near side between gradients.(2)in spatial,the aeromagnetic and gravitational data can help to judge the favorable local structures for oil and gas in the deep,find the favorable area of tectonic denudation in the shallow space and the channels for deduction matters migration from the deep to the shallow.(3)in metallogeny,the acid intrusive rocks and intermediate acid volcanic rocks can be delimited and the location and size of uranium sources be judged.(4)the gravitational and magnetic anomalies have high response on uranium metallogenic factors.By summarizing gravitational and magnetical prospecting signs and combining the uranium geology,seismic profiles etc.,three favorable uranium metallogenic areas and three prospects were delineated in the southeast area of Songliao basin.

关 键 词：重磁异常 铀矿 成矿要素 松辽盆地东南部 

分 类 号：P631.1[天文地球—地质矿产勘探] P631.2[天文地球—地质学]