沉积特征对砂岩型铀成矿类型的制约——以松辽盆地南部姚家组为例  

Constrain of sedimentary characteristics on the mineralization type of sandstone hosted uranium deposits——A case study of Yaojia Formation in the southern Songliao Basin

作　　者：马汉峰[1] 罗毅[1] 李子颖[1] 于振清[2] 

机构地区：[1]核工业北京地质研究院,北京100029 [2]核工业243大队,内蒙古赤峰024006

出　　处：《世界核地质科学》2010年第1期6-10,61,共6页World Nuclear Geoscience

基　　金：中国核工业地质局生产项目(编号:DD0501)

摘　　要：不同沉积体系砂体的特征不同,在后生铀成矿过程中所起的作用也不同。通过对松辽盆地南部姚家组地层沉积特征的研究,提出沉积特征对铀成矿类型有制约作用;上白垩统姚家组沉积体系以冲积平原、辫状河、三角洲和湖泊等为主,形成了稳定的泥-砂-泥地层结构,受沉积体系的控制,该区砂体厚度稳定、分布范围广,是松辽盆地南部寻找层间氧化带型铀矿的找矿有利目的层。Sand bodies of different sedimentary systems have different lithologic characteristics and play different roles in the formation of epigenetic uranium ore mineralization. Sedimentary features of Yaojia Formation in the southern Songliao Basin are studied and,it is found that the sedimentary systems of Upper Cretaceous Yaojia Formation are mainly predominated by alluvial plain,braided river,delta and lake etc.,which forms a steady mud-sand-mud strata structure. Controlled by sedimentary systems,the sand bodies are characterized by steady thickness,large distribution. Therefore,Yaojia Formation in the southern Songliao Basin is the favorite sequence for prospecting inter-layered oxidation zone uranium deposits.

关 键 词：沉积体系 松辽盆地 姚家组 成矿条件 制约 

分 类 号：P611.14[天文地球—矿床学] P598[天文地球—地质学]