高校地质学报2024，Vol.30Issue(3)：269-287,19.DOI:10.16108/j.issn1006-7493.2024022
海洋锂循环及其对表层碳循环的指示
Oceanic Lithium Cycling and Implications for Carbon Cycle
摘要
Abstract
How the carbon cycle influences the atmospheric carbon dioxide level is of a major concern for Earth's habitability.The oceanic lithium(Li)cycle can be used to trace carbon cycle because both cycles are controlled by chemical weathering,hydrothermal-seafloor interaction,and marine clay authigenesis which also known as reverse weathering.The variations in seawater Li isotope compositions posit changes in the sink and source processes such as continental weathering intensity and/or rate as well as reverse weathering rate.This paper reviews the global cycle of oceanic lithium and the mass balance for seawater lithium isotopes,focusing on the present-day fluxes and associated isotope fractionation mechanisms.Challenges still remain to better constrain the budgets as well as isotope fractionation factor especially in hydrothermal alteration and reverse weathering.The review also extends to the use of seawater li isotope records in tracing carbon cycle during climate events and critical time periods in the earth history.Collectively,this review highlights the potential as well as limitations of utilizing seawater Li isotope records to trace global carbon cycle in deep time.关键词
锂同位素/碳循环/大陆风化/反风化/热液蚀变Key words
Li isotope/carbon cycle/chemical weathering/reverse weathering/hydrothermal alteration分类
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曹程..海洋锂循环及其对表层碳循环的指示[J].高校地质学报,2024,30(3):269-287,19.基金项目
国家自然科学基金青年基金(422030031) （422030031）
国家自然科学基金重大项目(41991321)联合资助 （41991321）
