Hydrogen self-diffusion in single crystal olivine and electrical conductivity of the Earth's mantle.

ABSTRACT: Nominally anhydrous minerals formed deep in the mantle and transported to the Earth's surface contain tens to hundreds of ppm wt H₂O, providing evidence for the presence of dissolved water in the Earth's interior. Even at these low concentrations, H₂O greatly affects the physico-chemical properties of mantle materials, governing planetary dynamics and evolution. The diffusion of hydrogen (H) controls the transport of H₂O in the Earth's upper mantle, but is not fully understood for olivine ((Mg, Fe)₂SiO₄) the most abundant mineral in this region. Here we present new hydrogen self-diffusion coefficients in natural olivine single crystals that were determined at upper mantle conditions (2 GPa and 750-900 °C). Hydrogen self-diffusion is hi

SUBMITTER: Novella D 

PROVIDER: S-EPMC5509734 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature