大庆石油地质与开发

2013, v.32;No.158(04) 36-41

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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

封志兵,聂逢君,严兆彬,钟延秋,谷社峰,江丽
FENG Zhibing,NIE Fengjun,YAN Zhaobin,ZHONG Yanqiu,GU Shefeng,JIANG Li

摘要(Abstract):

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 moreover 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 mineralizing conditions of this kind of uranium are greatly good,the phreatic oxidation in West Overlap Belt is well developed,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 region 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 periods.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(KeyWords): 松辽盆地;西部斜坡;砂岩型铀矿;古河道型;成矿条件
Songliao Basin;West Slope;sandstone-type uranium deposit;paleo/ancient stream-channel type;mineralizing condition

Abstract:

Keywords:

基金项目(Foundation): 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

作者(Author): 封志兵,聂逢君,严兆彬,钟延秋,谷社峰,江丽
FENG Zhibing,NIE Fengjun,YAN Zhaobin,ZHONG Yanqiu,GU Shefeng,JIANG Li

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