CAJ | 학술논문

研究伊犁盆地南缘洪海沟地区主力含铀层系---中侏罗统西山窑组上段的沉积特征，为该区下一步铀矿地质勘查提供理论依据。根据沉积结构、岩性组合、沉积韵律、沉积构造、测井曲线等特征，认为西山窑组上段在洪海沟地区主要发育曲流河沉积。根据连井剖面特征，以及砂体厚度、砂地比等沉积特征在平面上的变化，洪海沟地区西山窑组上段沉积相的平面分布规律明显，中间为沿北西-南东向展布的曲流河道，河道南部为河漫沼泽，北部为河漫滩。综合研究区岩性、构造、铀源等成矿条件，西山窑组上段赋存的铀矿体主要受河道砂体展布方向、河道砂体厚度、砂体粒度、砂体中的泥岩夹层、地层产状等因素控制。
연구이리분지남연홍해구지구주력함유층계---중주라통서산요조상단적침적특정，위해구하일보유광지질감사제공이론의거。근거침적결구、암성조합、침적운률、침적구조、측정곡선등특정，인위서산요조상단재홍해구지구주요발육곡류하침적。근거련정부면특정，이급사체후도、사지비등침적특정재평면상적변화，홍해구지구서산요조상단침적상적평면분포규률명현，중간위연북서-남동향전포적곡류하도，하도남부위하만소택，북부위하만탄。종합연구구암성、구조、유원등성광조건，서산요조상단부존적유광체주요수하도사체전포방향、하도사체후도、사체립도、사체중적니암협층、지층산상등인소공제。
Studying sedimentary characteristics of the Upper Xishanyao Formation, which is the main uranium-bearing stratum in Honghaigou area of southern margin in Ili Basin,will provide important theory evidence for further uranium exploration in study area.Based on the characters of sedimentary tex-tures,lithologic associations, sedimentary rhythms, sedimentary structures, and logging curves, the Upper Xishanyao Formation can be considered as meandering channel facies in Honghaigou Area.Com-bined with the connected well's profiles,the lateral changes of sedimentary characteristics including the thickness of sand body,the ratio of sand to stratum,sedimentary facies of Middle Jurassic Upper Xishan-yao Formation was clear,which showed that there was meandering channel along northwest-southeast in the middle part,a flood swamp in the south and a floodplain in the north.By summarizing and analyzing the metallogenic conditions in study area,including lithology,tectonic setting,and uranium source,the uranium ore bodies occurred in the Upper Xishanyao Formation in Honghaigou area were mainly controlled by the distribution direction,thickness,grain size,the mudstone intercalations in sandbody,and the oc-currence of stratum.