硫同位素非质量分馏记录地幔不均一性及其地球动力学意义

Sulfur is a volatile element that is prone to mass-dependent fractionation of sulfur isotopes (MDF-S) during shallow magmatic processes (e.g., fractional crystallization and magma degassing), which limits us to constrain the properties of major mantle chemical reservoirs.The mass-independent fractionation of sulfur isotopes (MIF-S) is a phenomenon in which the fractionation behavior of sulfur isotopes deviates from the mass dependent relationship.MIF-S is mainly produced through photochemical reactions of sulfur-containing molecules under high-energy ultraviolet radiation, and its fractionation mechanism is closely related to the atmospheric evolution on early Earth.It is worth noting that MIF-S signals are commonly preserved 基金项目： 国家自然科学基金委员会面上项目(Nos. 42173051， 42473062)； 湖北省自然科学基金计划项目(No.2025AFA005).