世界核地质科学2025，Vol.42Issue(1)：13-28,16.DOI:10.3969/j.issn.1672-0636.2025.01.002
柴达木盆地东部德令哈凹陷新近系沉积特征及沉积相模式
The sedimentary characteristics and facies model of the Neogene in the Delingha depression,eastern Qaidam basin
摘要
Abstract
Delingha depression in the eastern Qaidam basin is believed a potential area for sandstone type uranium deposit in the target stata of the Neogene Shizigou formation and the Shangyoushashan formation.The in-depth investigation on the sedimentary facies characteristics and evolution of strata will provide valuable guidance for uranium exploration.Detailed observations of lithofacies assemblages and sedimentary formation in field outcrops,drilling cores,and well logging analyses have identified that the alluvial fan-braided river delta-lake are the dominant sedimentary facies type in the study area.Among these,the distributary channels in the braided river delta plain and subaqueous distributary channels in the braided river delta front are well-developed with significant scale and good connectivity,providing a favorable sedimentary environment for uranium enrichment.This new understanding has contributed to the knowledge of the spatial and temporal distribution of sand bodies in the Shizigou formation and the Shangyoushashan formations in the eastern Qaidam basin,and provided key information in guiding the future prospecting and exploration.关键词
柴达木盆地/沉积相/沉积特征/新近系/砂岩型铀矿Key words
Qaidam basin/sedimentary facies/sedimentary characteristics/Neogene/sandstone-type uranium deposit分类
地质学引用本文复制引用
钟灵,贺锋,赵兴齐,李西得,蔡煜琦,田明明,王杰..柴达木盆地东部德令哈凹陷新近系沉积特征及沉积相模式[J].世界核地质科学,2025,42(1):13-28,16.基金项目
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)、柴达木盆地中部断隆带铀成矿环境调查与远景评价(编号:202419-5) Supported by high-efficiency prediction technology and application of sandstone uranium resources in Qaidam basin(No.地H2301-1)and metallogenic environment investigation and prospective for uranium deposit in the central fault uplift zone of the Qaidam basin(No.202419-5). （编号:地H2301-1）
