世界核地质科学2026，Vol.43Issue(4)：673-689,17.DOI:10.3969/j.issn.1672-0636.2026.04.003
塔里木盆地喀什凹陷乌帕尔地段阿图什组下段沉积特征与铀成矿
Sedimentary characteristics and uranium metallogenesis of the lower member of Atushi formation in Wupaer segment of Kashi sag,Tarim basin
摘要
Abstract
The lower member of the Upper Series Artux formation in the Wupaer area,Kashgar sag,Tarim basin,serves as the main host horizon for sandstone-type uranium deposits.Investigating its sedimentary characteristics and uranium mineralization is of great significance for guiding uranium exploration in this region.Based on comprehensive analysis of field reconnaissance,core observation,and borehole data,a series of maps including isopach maps of the lower Artux formation and sand body thickness were compiled.Combined with oxidation and mineralization information revealed by boreholes and surface outcrops,the sedimentary facies and mineralization processes of the lower Artux formation were systematically analyzed.The results indicate that the sandstones in the lower Artux formation of the Wupaer area are mainly fine-to medium-grained feldspathic sandstone and feldspathic lithic sandstone.The ore-bearing host rocks contain carnotite,phosgenite,and pyrite.The study area is primarily characterized by alluvial fan and deltaic deposits.The alluvial fan facies can be subdivided into middle fan and inner fan subfacies,while the deltaic facies can be subdivided into microfacies such as deltaic plain distributary channels,deltaic plain interdistributary depressions,deltaic front subaqueous distributary channels,and deltaic front interdistributary bays.The facies transition zones between the deltaic plain distributary channels and the deltaic front subaqueous distributary channels are favorable for uranium mineralization.The uranium mineralization is evidently controlled by the interlayer oxidation zone and regional tectonics.It generally experienced stages of initial uranium enrichment,phreatic-to-interlayer oxidation transition,continuous development of the interlayer oxidation zone and uranium mineralization,and differential development.The area extending from the west of Tashdalan to Yoder,Xianazar,and southeast of Biaoerkuoyi village on the north limb of the syncline in the study area is a favorable zone for uranium mineralization,and can serve as a key target area for the next phase of sandstone-type uranium exploration in the Artux formation.关键词
铀矿/沉积特征/阿图什组/喀什凹陷/塔里木盆地Key words
uranium ores/sedimentary characteristics/Atushi formation/Kashi sag/Tarim basin分类
天文与地球科学引用本文复制引用
孙飞,王守玉,杨文龙,吕俊维,李振寰,袁忠,刘念..塔里木盆地喀什凹陷乌帕尔地段阿图什组下段沉积特征与铀成矿[J].世界核地质科学,2026,43(4):673-689,17.基金项目
中国核工业地质局铀矿地质项目"新疆塔里木盆地乌恰-尉犁地区铀矿资源调查评价与勘查"(编 号:202207和202607-X)资助 Supported by the Uranium geology project of the China National Nuclear Corporation Geological Bureau,"Uranium Resource Survey,Evaluation and Exploration in Wuqia-Yuli Area,Tarim Basin,Xinjiang"(No.202207 and 202607-X) （编 号:202207和202607-X）
