库车坳陷西段北部单斜带早中侏罗世沉积相特征及其与铀成矿关系  

Sedimentary Facies Feature of Early-Middle Jurassic and Implication for Uranium Mineralization in the North Monocline of Western Kuche Depression

作　　者：许强 秦明宽[1] 黄少华[1] 杨烨[1] 李娟[1] 刘章月[1] 何中波[1] 郭强[1] 宋继叶[1] XU Qiang;QIN Mingkuan;HUANG Shaohua;YANG Ye;LI Juan;LIU Zhangyue;HE Zhongbo;GUO Qiang;SONG Jiye(Beijing Research Institute of Uranium Geology,CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing 100029,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

出　　处：《铀矿地质》2019年第3期129-136,共8页Uranium Geology

基　　金：中国地质调查局地质调查项目(编号:DD2016013628; DD20190813-7);核能开发项目"准噶尔大型叠合盆地地浸砂岩型铀矿预测技术研究"联合资助

摘　　要：库车坳陷西段北部单斜带为向南倾的构造单斜带,早中侏罗世沉积了一套河-湖碎屑沉积体。下侏罗统塔里奇克组、阿合组、阳霞组和中侏罗统克孜勒努尔组为灰色含煤岩系,是砂岩型铀成矿有利层位。通过实测剖面、钻孔分析,识别出5类沉积相:辫状河、辫状河三角洲、曲流河三角洲、沼泽、湖。辫状河三角洲、曲流河三角洲砂体发育,隔水层稳定,泥-砂-泥结构好,为砂岩型铀成矿有利相带;辫状河隔水层不发育,泥-砂-泥结构差,不利于砂岩型铀成矿;沼泽、湖砂体不发育,不利于砂岩型铀成矿。The North monocline in the west of Kuche depression is a southern dripping slope which deposited alluvial-lacustrine lithosomic bodies of Early Jurassic Taliqike,Ahe,Yangxia formations and greycoal-bearing series of Middle Jurassic Kezilenuer Formation,which are favorable for sandstone type uranium mineralization. Braided stream,raided stream delta,meandering stream delta,swamp and lacustrine were identified by measured section and drillanalysis. Braided stream delta and meandering stream delta are favorable for sandstone type uranium mineralization because of well developed sandbodies,sustained water division layer and composition of mudstone-sandstone-mudstone. Braided stream sediments is not favorable for sandstone type uranium mineralization because of poor in confining bed and composition of mudstone-sandstone-mudstone. Swamp and lacustrine sediments are not favorable for sandstone type uranium mineralization because of less sandbodies.

关 键 词：库车坳陷 北部单斜带 早中侏罗世 沉积相 砂岩型铀矿 

分 类 号：P619.14[天文地球—矿床学]