Provenance and uranium source tracing for uranium-bearing series in the south of Songliao Basin: Evidence from zircon U Pb chronology and lithogeochemistry

作者：Hu Peng, Yangquan Jiao, Xiaofei Fu, Liqun Wu, Xiaodan Guo, Qingshuang Wang, Chao Liu · 发表于：Journal of Geochemical Exploration · 年份：2025 · DOI：10.1016/j.gexplo.2025.107703 · 被引用次数：23 · 研究领域：Radioactive element chemistry and processing、Geological and Geochemical Analysis、Geochemistry and Geologic Mapping

The study of uranium sources in sandstone-type uranium deposits has been significantly hindered by the absence of effective methodologies, thereby impeding uranium resource exploration efforts. This paper delves into the origin and evolution of sandstone-type uranium deposits, particularly in two newly discovered mineral localities in the southeastern Songliao Basin, employing zircon U Pb geochronology and petrogeochemistry. Additionally, it examines the evolutionary history of these deposits within the Paleo-Asian Ocean tectonic domain. The research reveals that the uranium-bearing series in the study area primarily originate from intermediate-acid magmatic rocks located in the active belt of the northern margin of the North China Craton and the continental island arc tectonic environment. The detrital zircon in the uranium reservoir sandstone, with a peak age range of 270–236 Ma, bears witness to the orogenic events involving the subduction, closure, and collision of the Paleo-Asian Ocean and the back-arc ocean basin. Meanwhile, the peak age range of 181–154 Ma signifies the Paleo-Pacific Ocean subduction impact in the study area. A comprehensive comparative analysis of zircon U Pb chronology and lithogeochemistry indicates that the highly differentiated granite (Baijiagou Pluton), which mixed with the crust in the Early Triassic syn -collisional orogenic environment, serves as a promising source of uranium in the study area. By utilizing the differences in weathering resis...