【摘要】 库车坳陷处于的塔里木盆地北部，其局部地区已有新的找矿发现，但整体而言仍未获得实质性找矿突破。文章依据区域地质和勘查钻孔资料，结合野外地质调查和样品采集测试，通过综合分析，探讨了库车坳陷在构造-地形地貌的盆山耦合过程中，上新统库车组区域成矿流场的迁移、汇聚过程，区域氧化带及砂岩型铀矿的构造改造特点和分类，并分析了不同构造改造型氧化带的铀成矿潜力。主要认识有：库车坳陷新生代以来的盆山耦合体制有利于“盆地”尺度初始氧化带及铀成矿流场的发育，上新统库车组中的含氧含铀成矿流体总体具自北向南渗流趋势。在库车坳陷内，东西向构造带限定了库车组成矿流场和大规模氧化带的发育空间和南部边界。随着同生长性质的秋里塔格构造带的逐步褶皱抬升，在拜城凹陷南部形成大型“拦水坝”（构造阻水带）和区域性排泄区，库车组区域成矿流场和氧化带被“阻拦”在秋里塔格构造带北翼，“新”“老”两套铀成矿系统在此处叠加，从而形成库车组最具规模的工业铀成矿带。库车组的构造改造型氧化带可划分为3类：早期铀成矿系统被后续氧化成矿流体进一步叠加改造型，铀成矿规模最大并最具找矿潜力，代表区段为日达里克—赛里木一带；早期铀成矿系统后期被构造阻断型，具备一定的成矿潜力，代表区段为温宿、东阿瓦特及却勒一带；早期铀成矿系统被后期氧化再迁移型，成矿潜力有限，代表区段为吐孜塔格及克拉苏构造带。更多还原

【Abstract】 Kuqa depression is located in the northern Tarim Basin and there are new prospecting discoveries in some areas. However, no substantive prospecting breakthrough was achieved on the whole depression. Based on regional geological and borehole data, this paper discussed the migration and convergence process of oreforming flow field, the structural transformation characteristics and classification of regional oxidation zone and sandstone-type uranium deposits in Kuqa depression during the basin-mountain coupling process of structuretopography and geomorphology, analyzed the uranium metallogenic potential of different structural transformation oxidation zones combined with field geological survey and samples assay. The main conclusions are as follows. The basin-mountain coupling system in Kuqa depression since Cenozoic is beneficial to the development of the initial oxidation zone and uranium ore-forming flow field at the "basin" scale, and the uranous-oxygenous ore-forming fluids in the Upper Cretaceous Kuqa Formation generally have a seepage trend from north to south. The east-west structural belt constrained southern boundary of Kuqa ore-forming flow field and the development space of large-scale oxidation zone. With the gradual folding and uplifting of Qiulitage structural belt in the same growth nature, a large-scale "dam"(water blocking structural belt) and regional drainage area were formed in the south of Baicheng Sag, and the regional metallogenic flow field and oxidation zone of Kuqa Formation were "blocked" in the north wing of Qiulitage structural belt, where the two sets of uranium metallogenic systems, "new" and "old", were superimposed. As a result, it formed the largest industrial uranium metallogenic belt in Kuqa Formation. The structural reformed oxidation zone of Kuqa Formation can be divided into three categories: The early uranium metallogenic system was further superimposed and reformed by subsequent oxidation ore-forming fluids, and form the largest uranium metallogenic area with greatest prospecting potential, the representative section is Ridarik-Sailimu area; The early uranium metallogenic system was blocked by structure in the later stage, which has certain metallogenic potential, and the representative sections are Wensu, east Awatt and Chule; The early uranium metallogenic system was oxidized and emigrated uranium in the later stage, and this type area is with limited metallogenic potential. The representative sections were Tuzitage and Crassus structural belts.更多还原