Chlorine isotope mantle heterogeneity: Constraints from theoretical first-principles calculations

Chloride exchanges between oceanic sediments and seawater: Constraints from chlorine isotopes

“…Additional constraints may be provided by a review of chlorine isotope fractionations between chlorides and phases that could incorporate lost chlorides. The thermodynamic properties of isotopes dictate that chlorine isotope fractionation factors, are close to 1.000 to a few permil, at temperatures above 0°C regardless the process (Urey, 1947;Richet et al, 1977;Schauble et al, 2003;Balan et al, 2019;Liu et al, 2021). Indeed, such ranges of chlorine isotope fractionation are observed in natural and experimental systems (Desaulnier et al;1986;Lavastre et al, 2005;Eggenkamp and Coleman, 2009;Sharp et al, 2010;Richard et al, 2011;Giunta et al, 2017a,b).…”

Towards In-Situ Geochemical Analysis of Planetary Rocks and Soils by Laser Ablation/Ionisation Time-of-Flight Mass Spectrometry

“…Several recent studies on lunar materials emphasize the importance of halogen components in understanding magmatic processes on the Moon. Apatite is thought to represent a record localising degassing during the final stages of the lunar magma ocean or later melt crystallisation [118], e.g., the analysis of the distribution of F, Cl, OH, including the isotope composition of Cl, can be an indicator of physical or chemical processes, such as degassing, while plasma cools down [119][120][121][122][123][124][125][126][127]. To derive the hydrogen abundance in apatite, the (F, Cl) volatile halogen element abundances were obtained using the element intensity correlation analysis for the data set at each studied location and applying the correction coefficient for each element.…”