松辽盆地西南部钱家店砂岩型铀矿床姚家组岩石学特征  

Study on Petrological Characteristics of Yaojia Formation in Qianjiadian Sandstone-type Uranium Deposit

作　　者：闫枫[1,2] 任帅锋 刘腾[1,2] YAN Feng;REN Shuai-feng;LIU Teng(State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710069 China;Department of Geology, Northwest University, Xi'an 710069 China)

机构地区：[1]西北大学大陆动力学国家重点实验室,陕西西安710069 [2]西北大学地质学系,陕西西安710069

出　　处：《科技创新与生产力》2018年第2期43-46,共4页Sci-tech Innovation and Productivity

基　　金：辽河油田股份项目(2016A-4803(GF))

摘　　要：松辽盆地西南部钱家店砂岩型铀矿床产于上白垩统姚家组,主要形成于辫状河流相。通过薄片观察发现含矿目的层是以中细-细粒长石岩屑杂砂岩为主,属多种岩性混合存在的岩石类型。通过阐述各种岩石类型的岩石学特征和物质组成,并对物质组成进行定量分析,发现含矿岩石中有大量花岗质成分,且岩石含矿性与其花岗质成分和岩屑比例呈正相关关系;岩屑成分包含花岗岩、硅质岩、正长细晶岩、硅化岩岩屑等富铀组分。结合蚀源区岩性及铀元素比例,推测该地区花岗质成分以及多种富铀岩屑成分为姚家组铀成矿提供了良好的物质来源。The Qianjiadian sandstone-type uranium deposit in the southwestern part of the Songliao Basin is produced in the Upper Cretaceous Yaojia Formation and mainly formed in the braided river phase.It is found that the ore-bearing target layer is composed of fine grained-middle fine grained feldspathic lithic graywacke and the rock types exist in a variety of lithologic blends,and the petrological characteristics and material composition of various rock types are clarified.Based on the quantitative analysis of the composition of the material,there are a lot of granitic elements in the ore rock and the rock mineral content is positively correlated with its granitic composition and cuttings.The lithofacies also contains uranium-rich components such as granite,siliceous rock,syenite,silicified rock.It is presumed that the granitic composition of the area and the composition of various uranium deposits provide good materials.

关 键 词：砂岩型轴矿床 杂砂岩 物质组成 含矿性 

分 类 号：P619.14[天文地球—矿床学] P588.2[天文地球—地质学]