世界核地质科学2025，Vol.42Issue(2)：230-245,16.
柴达木盆地东部新生代构造演化及其对砂岩型铀矿的控制作用
Cenozoic structural evolution of the eastern Qaidam basin and its control on the formation of sandstone-type uranium deposits
摘要
Abstract
Qaidam basin,located at the northeastern margin of the Qinghai-Tibet Plateau,is one of China's major large-scale oil-and gas-bearing basins.The results of uranium exploration in recent years show that it has good prospects of uranium mineralization.However,compared to the western Qaidam basin,research on the fundamental geology and uranium exploration in the eastern Qaidam basin remains relatively underdeveloped.Based on systematic summary of low-temperature thermochronological data,provenance and growth strata characteristics,the Cenozoic tectonic evolution history of the east Qaidam area was reviewed.We investigated the control of Cenozoic structural evolution on uranium mineralization in the eastern Qaidam,through comprehensive analysis of typical uranium occurrences surface(field observations)and near-surface(seismic profiles)data.The results indicated that fault systems exert primary control over uranium mineralization,with uranium occurrences predominantly distributed within the flank of gentle anticlinal near the thrust faults,and the Olongbulak North Fault and its secondary faults may work as the principal ore-controlling faults.The uranium mineralization in the east Qaidam occurs predominantly by exudative uranium metallogeny,with Carboniferous hydrocarbon source rocks potentially serving as significant provider of abundant uranium for the mineralization processes.The fault systems within the basin provide effective channels and driving force for the upward migration of deep uranium-rich reduction fluid,and the regional intense compression and hydrocarbon generation control the spatial position of uranium mineralization.The findings in this paper are meaningful for the following uranium exploration work in the east Qaidam basin.关键词
柴达木盆地东部/砂岩型铀矿/构造演化/渗出铀成矿作用/流体动力Key words
eastern Qaidam basin/sandstone-type uranium deposit/structural evolution/exudative uranium metallogeny/hydrodynamic分类
天文与地球科学引用本文复制引用
周保军,张希梁,王杰,蔡煜琦,李子颖,贺锋,陈程,田明明,赵兴齐,李西得,李孟华..柴达木盆地东部新生代构造演化及其对砂岩型铀矿的控制作用[J].世界核地质科学,2025,42(2):230-245,16.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)"和中国核工业地质局铀矿调查评价项目"柴达木盆地中部断隆带铀矿化环境调查与远景评价(编号:202419-5)"联合资助 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)",uranium investigation and evaluation project of China Nuclear Geology"Investigation and prospective evaluation of uranium metallogenic environment in the central fault-uplift of the Qaidam basin(No.202419-5)" （编号:地H2301-1）
