【摘要】 大陆化学风化作用是塑造地球表面形态、影响全球物质循环以及调节全球气候的关键过程之一，有效示踪地表风化过程一直是地学领域关注的焦点。锂及其同位素的化学性质独特，在示踪大陆硅酸盐风化方面展现出巨大潜力。论文系统梳理文献，深度剖析实验模拟、风化剖面、流域尺度等领域化学风化过程中锂同位素的分馏行为和模式，在此基础上获得如下认识：(1)表生环境下大陆风化过程具有复杂性，化学风化强度与δ~7Li值之间呈非线性关系；(2)已发表数据的集成研究表明，强风化地区风化物δ~7Li值与Li含量之间的关系表现为两种模式(Li含量变化有限，但δ~7Li值分异却十分显著；δ~7Li值分异有限，Li含量却存在一定的分异)，其成因有待进一步研究；(3)中国南方红土区作为风化研究的理想区域，在探索锂同位素分馏机理与模式方面展示出潜力。论文认为，Li同位素体系化学风化示踪方面仍存在诸如对复杂过程的量化研究不足、多尺度集成研究有限、强风化产物锂同位素机理不明、尚未形成全球风化估算模型等问题。未来有必要继续加强实验室模拟、实证研究和多尺度集成研究，进一步拓展空白地区锂同位素机理探究的潜力，基于多同位素体系联用等途径印证Li同位素化学风化示踪的有效性。更多还原

【Abstract】 Continental chemical weathering is one of the key processes shaping the Earth’s surface morphology,influencing the global material cycle and regulating the global climate.Effectively tracing surface weathering processes has consistently been a focal point within geosciences.Lithium and its isotopes,distinguished by their unique chemical properties,exhibit great potential in tracing continental silicate weathering.This article systematically reviewed the literature and analyzed the fractionation behavior and patterns of lithium isotopes during chemical weathering processes in experimental simulations,weathering profiles,and at the watershed scales.Based on this analysis,the following insights are obtained:1) The continental weathering process in surface environments is complex,exhibiting a nonlinear relationship between chemical weathering intensity and the δ~7Li value.2) Integrative studies of published data indicate that the relationship between the δ~7Li values of weathered materials and lithium content in highly weathered regions exhibits two patterns (The variation in Li content is limited,yet the δ~7Li values exhibit significant differentiation;conversely,there is a certain degree of variation in Li content when the differentiation of δ~7Li values is limited),with the underlying causes requiring further investigation.3) The red earth region in southern China is an ideal area for weathering research,showing potential in exploring the mechanisms and patterns of lithium isotope fractionation.This article argues that there are still issues in using lithium isotopes as a tracer for chemical weathering,such as insufficient quantitative studies of complex processes,limited multi-scale integrated research,unclear mechanisms of lithium isotopes in highly weathered products,and the lack of a global weathering estimation model.Future efforts should focus on enhancing laboratory simulations,empirical studies,and multi-scale integrated research to further explore the potential of lithium isotope mechanisms in underexplored areas and validate the effectiveness of lithium isotope tracing in chemical weathering through the combined use of multi-isotope systems.更多还原