Article Dans Une Revue Chemical Geology Année : 2024

Linking the oxygen-17 compositions of water and carbonate reference materials using infrared absorption spectroscopy of carbon dioxide

Résumé

Joint measurements of the 18 O/ 16 O and 17 O/ 16 O ratios of carbonate minerals and waters are increasingly used to investigate various geochemical, physical and biological processes. Diverse analytical methods, each of them technically challenging in one way or another, have been developed or refined in recent years to measure oxygen-17 anomalies (Δ' 17 O) with instrumental precisions of 10 ppm or better. A critical underpinning of all these methods is how the international carbonate reference materials currently anchoring the VPDB 18 O/ 16 O scale are linked to the primary VSMOW-SLAP scale in ( 18 O/ 16 O, 17 O/ 16 O) space. For now, however, substantial systematic discrepancies persist between different groups and methods, even after all measurements are nominally standardized to VSMOW-SLAP.

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hal-04802577 , version 1 (25-11-2024)

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Justin Chaillot, Samir Kassi, Thibault Clauzel, Marie Pesnin, Mathieu Casado, et al.. Linking the oxygen-17 compositions of water and carbonate reference materials using infrared absorption spectroscopy of carbon dioxide. Chemical Geology, 2024, pp.122450. ⟨10.1016/j.chemgeo.2024.122450⟩. ⟨hal-04802577⟩
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