【摘要】 以内蒙古扎鲁特地区上二叠统林西组陶海营子剖面为研究对象，通过地层结构、岩石组合、岩石主量元素、微量元素及黏土矿物分析，结合Sr/Ba、V/（V+Ni）、Ni/Co等元素地球化学指标，探讨其沉积环境与古气候特征。陶海营子剖面中林西组以细砂岩-泥岩为主，具向上变粗再变细地层结构特征，微量元素Sr/Ba值指示淡水陆相沉积环境，V/（V+Ni）和Ni/Co值反映弱氧化-弱还原的湖泊相条件。主量元素MgO/CaO值、Al₂O₃/MgO值、微量元素Sr/Cu值、Rb/Sr值)和古气候指数C共同揭示温暖湿润气候特征，CIA值表明中等风化强度。黏土矿物以绿泥石和伊利石为主，显示沉积末期存在短暂干旱事件。研究表明，上二叠统林西组沉积时期，扎鲁特地区以三角洲-湖泊相为主，气候整体温暖潮湿，末期出现干热波动。更多还原

【Abstract】 Abstrct: This study investigates the Taohaiyingzi section of the Late Permian Linxi Formation in the Zhalut area of Inner Mongolia through integrated stratigraphic structure and rock assemblage and comprehensive geochemical analyses of rock major elements, trace elements, and clay minerals, combined with key geochemical indices including Sr/Ba, V/（V+Ni）, and Ni/Co ratios to systematically characterize the depositional environment and paleoclimatic conditions. In the Taohaiyingzi section, the Linxi Formation is mainly composed of fine sandstone and mudstone, showing the stratigraphic structural feature of coarsening upward followed by fining. The Sr/Ba values indicate a fresh water continental sedimentary environment, and the values of V/（V+Ni） and Ni/Co reflect the lacustrine facies conditions of weak oxidation-weak reduction.The major element ratios（MgO/CaO, Al₂O₃/MgO）, trace element indices（Sr/Cu, Rb/Sr）, and paleoclimatic index C collectively indicate a warm and humid climate, while the Chemical Index of Alteration（CIA） suggests moderate weathering intensity.The clay mineral assemblages dominated by chlorite and illite reveal a transient arid episode towards the terminal depositional phase. Our findings establish that the Late Permian Linxi Formation in the Zhalut region represents a deltaiclacustrine system that developed under predominantly warm and humid conditions with episodic dry-hot fluctuations.更多还原