世界核地质科学2026，Vol.43Issue(4)：658-672,15.DOI:10.3969/j.issn.1672-0636.2026.04.002
准噶尔盆地北部黄花沟地区铀矿地质特征与成矿时代
Geological characteristics and metallogenic ages of uranium mineralization in Huanghuagou area,northern Junggar basin
摘要
Abstract
Three types of uranium mineralization have been identified in sandstones of the Lower Cretaceous Tugulu group in the Huanghuagou area,northern Junggar basin:apatite-type,infiltration-type,and supergene-type.Detailed petrological,mineralogical,geochemical,and geochronological studies on these three types of uranium ore samples yield the following insights:1)In the apatite-type uranium ores,no independent uranium minerals are developed;uranium occurs as an isomorphous substitution in microcrystalline apatite,which exists as cement.A whole-rock U-Pb isochron age of 76.5±6.6 Ma was obtained,indicating that the mineralization occurred during the sedimentary hiatus between the Upper Cretaceous Honglishan formation and the Lower Cretaceous Tugulu group.2)In the"infiltration-type"uranium ores,coffinite is the main uranium mineral,spatially closely associated with plant fragments and pyrite.Uranium mineralization is located at the redox transition zone.U-Th-Pb chemical dating of uranium minerals yields an age of 11.5 Ma,suggesting that the"infiltration"uranium mineralization took place during the sedimentary hiatus between the Neogene Suosuoquan formation and the Paleogene Ulunguhe formation.3)The supergene-type uranium ores are the oxidized surface remnants of the"infiltration-type"uranium ores,in which uranium occurs as secondary uranium minerals(carnotite,tyuyamunite,and metatyuyamunite).Lead contents in these uranium minerals are below the detection limit,indicating that the supergene alteration occurred during the Quaternary.Based on the characteristics of the three uranium mineralization types,it is concluded that future uranium exploration in the Huanghuagou area should focus primarily on the"infiltration-type"uranium deposits.关键词
准噶尔盆地/砂岩型铀矿/成矿特征/成矿时代/黄花沟地区/磷灰石Key words
Junggar basin/sandstone-type uranium deposit/mineralization characteristics/mineralization ages/Huanghuagou area/apatite分类
天文与地球科学引用本文复制引用
朱斌,吴玉,钟军,陈虹,毛广振,杨彦波..准噶尔盆地北部黄花沟地区铀矿地质特征与成矿时代[J].世界核地质科学,2026,43(4):658-672,15.基金项目
核工业地质局铀矿地质勘查项目(编号:202406-9和202606-6)和铀资源探采与核遥感全国重点实验室开放基金项目(编号:NKLUR-2024-YB-005)联合资助 Supported jointly by the Uranium Geological Exploration Project of the Bureau of Geology of Nuclear Industry(No.202406-9 and No.202606-6)and the Open Fund Project of the National Key Laboratory of Uranium Resources Exploration-Mining and Nuclear Remote Sensing(No.NKLUR-2024-YB-005) （编号:202406-9和202606-6）
