热液流体活动对盆地中流体与岩石相互作用、烃类形成具有重要影响。为此，运用大视域拼接扫描电镜、矿物定量分析、X射线衍射、同位素、电子探针等技术手段，阐明了川东南五峰组-龙马溪组黑色页岩热液活动的矿物学和地球化学特征。研究结果表明：以钡冰长石、方解石、磷灰石、重晶石为主的非金属矿物和以闪锌矿、黄铁矿、方铅矿、黄铜矿为主的金属矿物组合具有典型的热液活动特征；重晶石原位锶同位素比值在0.19 76 ~． 23 94，平均值为0．.22 37；碳酸盐矿物含量异常高，最高达60%。结合前人研究构建了川东南地区五峰组-龙马溪组热液流体活动的矿物学和地球化学识别标志，认为热液流体活动对储集空间具破坏性。

The influence of hydrothermal fluids on fluid-rock interactions and hydrocarbon generation in basins is of great significance. The mineralogical and geochemical characteristics of hydrothermal activity in the black shale of the Wufeng Formation-Longmaxi Formation in southeastern Sichuan was investigated using advanced techniques such as large field splicing scanning electron microscopy, mineral quantitative analysis, X-ray diffraction, isotopes, and electron probes. The results show that non-metallic minerals such as barium ice feldspar, calcite, apatite, and barite, as well as metal minerals like sphalerite, pyrite, galena, and chalcopyrite, exhibit distinct characteristics of hydrothermal activity. The in-situ Sr isotope ratio of barite ranges from 0.719 76 to 0.723 94, with an average of 0.722 37. The carbonate mineral content is exceptionally high, up to 60%. Based on previous research, mineralogical and geochemical indicators for hydrothermal fluid activity in the Wufeng Formation-Longmaxi Formation of southeastern Sichuan were established, suggesting that hydrothermal fluids have detrimental effects on reservoir space.