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Behavior of Li and its isotopes during serpentinization of oceanic peridotites ArchiMer
Decitre, S; Deloule, E; Reisberg, L; James, R; Agrinier, P; Mevel, C.
[1] Analyses of Li and Li isotopes in serpentinized peridotites have been performed using Thermo-Ionisation Mass Spectrometry (TIMS) and Secondary Ion Mass Spectrometry (SIMS) techniques on samples collected from the southwest Indian Ridge (SWIR). In the bulk samples, Li concentrations range from 0.6 to 8.2 ppm, while whole rock delta(6)Li values range from -2.9 to -14parts per thousand. In situ analyses display a greater range in both Li concentration (0.1-19.5 ppm) and Li isotopic composition ( -27 to +19parts per thousand), with the serpentinized portions having higher Li concentrations than the associated relict phases. These variations may reflect changes in Li partitioning and isotopic fractionation between serpentine and fluid with temperature and...
Tipo: Text Palavras-chave: Lithium; Isotopes; Geochemical cycle; Oceanic crust; Serpentinization.
Ano: 2002 URL:
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