铀矿地质2026，Vol.42Issue(5)：777-790,14.DOI:10.3969/j.issn.1000-0658.2026.42.060
乌兹别克斯坦西部努库斯地区上白垩统土伦组沉积特征及铀成矿意义
Sedimentary Characteristics and Uranium Mineralization Significance of Upper Cretaceous Toulon Formation in Nukus Area of Western Uzbekistan
摘要
Abstract
In Nukus area of western Uzbekistan,the tectonic evolution has been stable since the Mesozoic-Cenozoic era and produced the Upper Cretaceous Toulon Formation,which is a set of thick-layered medium-fine-grained primary gray and grayish-green carbonaceous debris,with interlayer oxidation zones and certain exploration space for sandstone-type uranium deposits.To further enhance geological understanding and summarize and analyze the conditions for uranium mineralization,the article summarized and generated the characteristics of the sandstone clastic composition,sandstone structure,sedimentary structure,logging facies,and sand body distribution of the Toulon Formation.It holds that Upper Cretaceous Toulon Formation is a large delta sedimentary system developing from northeast to southwest,with thick-layer leading edge facies stable sand bodies.Uwais uplift was a small offshore uplift during the Toulon Formation sedimentation period,providing a small amount of nearby material sources.Through comprehensive analysis,it was believed that in Nukus area,the Lower Cambrian-Ordovician uranium-rich strata had not been exposed on the surface due to tectonic evolution,and the uranium source conditions were not favorable as those in the Central Kyzylkum uranium mineralization area.The post-sedimentary oxygenated water recharge direction in the study area was inconsistent with the paleocurrent direction during the sedimentary period and the main flow direction of the interlayer oxidation zone water was northwestward,therefore the favorable prospecting area should be the northwest part of Uwais uplift.关键词
砂岩型铀矿/沉积特征/上白垩统土伦组/层间氧化带/中央克孜勒库姆/乌兹别克斯坦Key words
sandstone-type uranium deposits/sedimentary characteristics/Upper Cretaceous Toulon Formation/interlayer oxidation zone/Central Kizilkum/Uzbekistan分类
天文与地球科学引用本文复制引用
陈虹,廉刚,黄松,刘富强,王进伟..乌兹别克斯坦西部努库斯地区上白垩统土伦组沉积特征及铀成矿意义[J].铀矿地质,2026,42(5):777-790,14.基金项目
中核铀业海外铀矿勘查项目(编号:202402)资助 （编号:202402）
