Micro-textural and geochemical constraints on fluid–rock interaction and fluid fluctuation in hydrothermal strategic metal mineralization systems

作者：Hao Song, Qi Li, Kun-Feng Qiu, Zhengqi Xu, Huijie Yu, Jun Deng · 年份：2026 · DOI：10.5194/egusphere-egu26-22630 · 研究领域：Geological and Geochemical Analysis、Geochemistry and Geologic Mapping、Geochemistry and Elemental Analysis

The formation of hydrothermal deposits of strategic metals such as gold and uranium involves complex, multi-stage processes coupling fluid–rock interaction, structural dynamics, and chemical evolution across scales. This study integrates structural and micro-textural analysis with multi-scale chemical kinetic investigations to elucidate the dynamics of element enrichment and ore formation. We focus on bridging the dynamic linkages between micro- to nano-scale textures and the larger-scale chemical evolutionary processes in complex natural systems, aiming to decode the kinetic mechanisms governing element migration and mineralization. Modern analytical approaches, including machine learning–assisted data interpretation, are explored for their potential to resolve the spatio-temporal evolution of mineralization.Using representative hydrothermal gold deposits from the Jiaodong region and uranium deposits from the Bashibulake district (Xinjiang) in China as case studies, we investigate the micro-textures and in-situ trace element and oxygen isotopic compositions of hydrothermal quartz. Cathodoluminescence (CL) zoning and cross-cutting relationships reveal multiple generations of quartz, corresponding to discrete fluid infiltration events. The CL intensity correlates positively with Al content but not with δ18O, indicating differing controls on trace element incorporation versus isotopic fractionation. Elevated trace elements (e.g., Al) in quartz are attributed to intensified flui...