松辽盆地西部斜坡铀成矿条件及聚铀模式  

MINERALIZING CONDITIONS AND METALLOGENIC MODEL OF URANIUM IN WEST SLOPE OF SONGLIAO BASIN

作　　者：封志兵[1] 聂逢君[1] 严兆彬[1] 钟延秋[2] 谷社峰[2] 江丽[3] 

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]中国地质大学地球物理与信息技术学院,北京100083

出　　处：《大庆石油地质与开发》2013年第4期36-41,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金项目(40972067;41104073);大庆油田"大庆长垣地区砂岩型铀矿后生氧化作用;成矿条件与找矿方向"项目;江西省自然科学基金项目(2010GQS0002);江西省研究生创新专项资金项目(YC2012-S085)联合资助

摘　　要：以地质、地震、测井等资料为基础,通过野外地质、放射性地球物理、水文地质等调查及测量工作,应用砂岩型铀矿成矿理论分析认为:松辽盆地西部斜坡区砂岩型铀矿成矿条件良好,西部超覆带潜水氧化较发育,存在潜地表铀异常;西部斜坡中部水动力系统、断裂控制铀聚集作用明显,是形成古河道砂岩型铀矿的有利区,主要成矿层位是四方台组,存在不同时期的2种聚铀模式,松辽盆地西部铀矿勘查重点是古河道、河流与支流交叉口及几大水系入湖处的三角洲。Based on the geological, seismic, well logging and other data in West Slope of Songliao Basin, and mo- reover through the field geologic, radioactive geophysical, hydrogeological investigations/surveys and so on, the analyses are shown as follows with the help of the mineralizing theory of sandstone-type uranium deposit ： the miner- alizing conditions of this kind of uranium are greatly good, the phreatic oxidation in West Overlap Belt is well de- veloped, and moreover there is a latent surface uranium anomaly. The hydrodynamic system and faulting in the middle of the western slope possess much obvious controlling action to the uranium aggregation, thus make the re- gion develop into the favorable area of the sandstone-type uranium deposit in the ancient stream channels, the main mineralized horizon is Sifangtai Formation and there are two kinds of uranium accumulating mode with different peri- ods. In West Slope of Songliao Basin, the key uranium deposit survey areas are focused on the paleo-channels, theintersections between the rivers and tributaries and furthermore the deltas into the lake for several major river systems.

关 键 词：松辽盆地 西部斜坡 砂岩型铀矿 古河道型 成矿条件 

分 类 号：TE341[石油与天然气工程—油气田开发工程]