准噶尔盆地西部车排子地区新近系沙湾组铀矿化特征、控矿因素及找矿方向  

Uranium Mineralization Characteristics,Ore-controlling Factors and Prospecting Direction of Neogene Shawan Formation in Chepaizi Area,Western Junggar Basin

作　　者：毛广振 MAO Guangzhen(Geologic Party No.216,CNNC,Urumqi,Xinjiang 830011,China)

机构地区：[1]核工业二一六大队,新疆乌鲁木齐830011

出　　处：《铀矿地质》2023年第4期569-580,共12页Uranium Geology

基　　金：中国核工业地质局项目“新疆准噶尔盆地铀矿资源调查评价与勘查”(编号:202206)资助。

摘　　要：准噶尔盆地西部车排子地区是近年来可地浸砂岩型铀矿找矿新的突破地区之一,尤其是沙湾组的铀资源潜力较大。文章以岩心、测井曲线等资料为基础,结合沙湾组砂体厚度、沉积相、底板构造等图件的编制,分析和总结了沙湾组铀矿化特征和控矿因素。研究认为,沙湾组铀矿化受灰绿色蚀变带控制,垂向上,发育在砂体顶、底板粗细粒沉积物转变的位置;平面上,发育在南北沉积体系交汇处,以及水下分流河道交汇、分叉、分流间湾过渡的位置。本区的成矿有利位置是灰绿色蚀变带和双物源交汇处,下一步找矿重点是查证灰绿色蚀变带与灰色带过渡部位。Chepaizi area in western Junggar Basin is one of the new discovered areas for in-situ leachable sandstone-type uranium deposits in recent years,uranium resources in Shawan Formation is of especially the potential.Based on the data of core and logging curve,combined with the compilation of sand body thickness,sedimentary facies and floor structure of Shawan Formation,this paper analyzed and summarized the uranium mineralization characteristics and ore-controlling factors.The study suggests that the uranium mineralization of Shawan Formation is controlled by gray-green alteration zone;vertically,it develops at the position where the coarse and fine sediments of the top and bottom of the sand body change;horizontally,it develops at the intersection of the north and south sedimentary systems,as well as the intersection,bifurcation and transition position of the underwater distributary channel.The prospecting indicator is the area where the gray-green alteration zone and the double source intersect.The next prospecting should focus on the verification of mineralization between the contact of the gray-green alteration zone and the gray zone.

关 键 词：铀矿化特征 沙湾组 车排子地区 准噶尔盆地 

分 类 号：P619.14[天文地球—矿床学]