Baft ophiolite mélange is a part of Naein-Baft ophiolite (southeast of Kerman province in Iran). Serpentinites from Baft ophiolite mélange contain different types of spinels such as chromite, chromespinel, ferritchromite and magnetite which can reveal different stages of evolution in host serpentinites. The compositions of Baft chromites show that they belong to podiform chromitites that may ha...

Methane (CH4) associated with marine and terrestrial sites of serpentinization has been proposed to be abiotic in origin. However, the source carbon depth temperature CH4 synthesis often remain inconclusive. We measured radiocarbon (14C), bulk stable isotope ratios (δ13C δD) isotopologue abundance (Δ13CH3D) CH4, noble gas composition samples from two hyperalkaline geothermal wells (Happo #1 Hap...

[1] Spatial variability of methane (CH4) on Mars suggests the presence of localized subsurface sources. Here, we show that olivine hydration in the Martian regolith and crust may be a major CH4 source, which contributed significantly to the warming of early Mars. Methane production is kinetically and thermodynamically favored during low-T aqueous alteration of olivine-rich rocks. Sustained rele...

Lunine, M. Pasek, D. Cordier, J. H. Waite Jr., K. E. Mandt, W. S. Lewis, and M.-J. Nguyen, Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA ([email protected]), Université de FrancheComté, Institut UTINAM, CNRS/INSU, UMR 6213, Observatoire des Sciences de l’Univers de Besançon, France, Université de Rennes 1, Institut de Physique de Rennes, CNRS, UMR 6251, France, Eco...