宝龙山铀矿床姚家组下段砂岩岩石学特征与成岩作用  

Petrological Characteristics and Diagenesis of Sandstone of the Lower Yaojia Formation in Baolongshan Uranium Deposit,South of Songliao Basin

作　　者：贾立城[1] 蔡建芳[2] 黄笑 张康[1] 张亮亮[2] 孙晨 JIA Licheng;CAI Jianfang;HUANG Xiao;ZHANG Kang;ZHANG Liangliang;SUN Chen(CNNC Key Laboratory of Uranium,Resource Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,Beijing 100029,China;Geologtc Party No.243,CNNC,Chifeng,Inner Mongolia 024000,China)

机构地区：[1]核工业北京地质研究院中核集团铀资源勘查与评价技术重点实验室,北京100029 [2]核工业二四三大队,内蒙古赤峰024000

出　　处：《铀矿地质》2018年第5期264-273,共10页Uranium Geology

摘　　要：文章通过对宝龙山铀矿床姚家组下段砂岩开展岩石学特征和成岩作用研究,初步查明了该段砂岩的物质成分、结构和碳酸盐胶结物类型与胶结期次,确定了赋矿层砂岩经历的主要成岩作用及其演化序列(包括压实、胶结、交代和溶解作用等)。在此基础上,探讨了区内砂岩成岩作用与铀成矿作用的耦合关系,认为姚家组下段砂岩具有良好的成分与物性条件,是本区大规模铀成矿的必要条件。By studying the petrological characteristics and diagenesis of the sandstone of the lower Yaojia formation in Baolongshan deposit, this paper identified the material composition and structural characteristics of sandstone. It also defined that the main diagenetic effects of sandstones in the lower Yaojia formation as compaction, cementation, metasomatism and dissolution. The mineral types and cementation times of carbonate cements were studied,and the diagenetic evolution and sequences of sandstones in the lower Yaojia formation were restored. On this basis, the coupling relationship between sandstone diagenesis and uranium mineralization was discussed. It was proved that good composition and physical condition of sandstone of the lower Yaojia formation is the necessary condition for large -scale mineralization in this area.

关 键 词：宝龙山铀矿床 姚家组砂岩 成岩作用演化序列 胶结作用 

分 类 号：P612[天文地球—矿床学]