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Cheung, Chris Tsz Long Data for: Mafic rock weathering, river lithium isotopes, and the evolution of Cenozoic seawater chemistry Mendeley Data Data Repository Items for our manuscript titled "Mafic rock weathering, river lithium isotopes, and the evolution of Cenozoic seawater chemistry" submitted to Earth and Planetary Science Letters. 1 file is attached in this repository: Supplementary Data File 1 Supplementary Data File 1 contains: - The 3 supplementary tables seen in the supplementary material file - All geochemical, clay mineral, and riverine topographical and hydrological data generated for this study - Li mass balance model construction, parameters and results - Global d7Li dataset and references - Cenozoic seawater Mg/Ca ratio dataset and references Supplementary table captions: Table S1. Sampling localities. Table S2: Li mass balance - Model input parameters. Model flux and isotopic ratios were based on and adapted from the present-day end-member scenario seen in (Misra & Froelich, 2012; See references therein). See Fig. 7, Supplementary Text 4, and Table S3 for detailed description of the model construction. Table S3: Li mass balance - Present day global mafic flux values. Values used to estimate the present-day mafic riverine flux, which was then scaled through the Cenozoic with the global active suture length record, to estimate the ultramafic-to-mafic draining riverine flux at each timestep. Sources: A = Gaillardet et al. (1999); B = Misra and Froelich (2012); C = Bekele and Schmerold (2020); D = Gard et al., (2019); E = Dessert et al. (2003). Geochemistry Chemical Weathering Lithium McKenzie, Ryan Dataset doi:10.17632/r894xj7kzx.2 oai:data.mendeley.com/r894xj7kzx.2 Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 https://data.mendeley.com/datasets/r894xj7kzx 2026-01-28T13:05:00Z