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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Si- versus Mg-metasomatism at the crust–mantle interface: insights from experiments, natural observations and geochemical modeling

Fig. 1

a Mineral stability with temperature and silica activity for the MgO–SiO2–H2O system at 0.1 and 1.0 GPa. The dashed lines indicate the solubility of quartz in water. Fo: forsterite, Srp: serpentine, Atg: antigorite, Brc: brucite, Tlc: talc, Qz: quartz. b Results of a typical diffusion–reaction model by Lichtner et al. (1986) for the development of reaction zones between forsterite and quartz in the MgO–SiO2–H2O system. Distinct talc and serpentine zones developed in the Ol-hosted region, whereas a small talc zone formed in the Qz-hosted region. The volume fraction is defined as the ratio of the volume of the mineral to the initial solid volume

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