Species diffusion in clinopyroxene solid solution in the diopside-anorthite system.

ABSTRACT: The coupled multicomponent diffusion of the species Ca₂Si₂O₆, CaAl₂SiO₆ and Mg₂Si₂O₆ was determined in diopside crystals in the diopside/anorthite (Di/An) system at temperatures (T) of 1110-1260 °C and oxygen fugacities (fO ₂ ) between 1.0 log unit below and above the fayalite-magnetite-quartz equilibrium (FMQ ± 1). Diffusion couples were prepared by the seed overgrowth technique. Element concentration profiles were measured perpendicular to the rim/core interface by step-scanning profiling with a field emission gun scanning electron microscope (FEG-SEM). The multicomponent diffusion matrix was solved by fitting its eigenvalues (λ) and eigenvectors (v) to th

SUBMITTER: Lierenfeld MB 

PROVIDER: S-EPMC6515693 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature