世界核地质科学2026，Vol.43Issue(1)：22-36,15.DOI:10.3969/j.issn.1672-0636.2026.01.002
柴达木盆地北缘东部中新统上油砂山组沉积相特征及其与铀成矿关系
The relationship between the characteristics of sandbody and uranium mineralization of Miocene Shangyoushashan formation in the eastern part of northern margin of the Qaidam basin
摘要
Abstract
Recently,several Cenozoic sandstone-type uranium occurrences have been successively discovered along the northern margin of the Qaidam basin.Taking the Upper Youshashan formation of the Miocene series as the target horizon,this study integrates field mapping,core logging,sedimentary architecture and geochemical analyses to elucidate the sedimentological controls and metallogenic mechanism of uranium mineralization.The Upper Youshashan formation sandstones are predominantly lithic arkoses and feldspathic litharenites,formed during a depositional stage governed by a cold-arid paleoclimate.The sedimentary environment was dominated by braided river delta front deposits,and the sand bodies generally exhibit a positive cyclicity characterized by"coarse at the bottom and fine at the top".The subaqueous distributary channel microfacies,as well as the transitional microfacies between subaqueous distributary channels and interdistributary bays,provide favorable locations for the enrichment of uranium mineralization.Sand-body thickness and sedimentary microfacies dictate the spatial distribution of mineralization,whereas the high connectivity of the reservoir sandstones provided efficient conduits and traps for ore-forming fluids.This research result can provide a theoretical basis and practical reference for subsequent uranium resource exploration in the region.关键词
上油砂山组/沉积建造/砂岩型铀矿/德令哈地区/柴达木盆地Key words
Shangyoushashan formation/sedimentary formation/sandstone-type uranium deposit/Delingha area/Qaidam basin分类
天文与地球科学引用本文复制引用
钟灵,贺锋,赵兴齐,李西得,田明明,王杰,周保军,蔡煜琦..柴达木盆地北缘东部中新统上油砂山组沉积相特征及其与铀成矿关系[J].世界核地质科学,2026,43(1):22-36,15.基金项目
核技术研发项目"柴达木盆地砂岩型铀矿资源高效预测技术及应用研究(编号:地H2301-1)" Supported by Nuclear Technology R&D program"Study on efficient prediction technology and application of sandstone-type uranium resources in Qaidam basin(No.地 H2301-1)" （编号:地H2301-1）
