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Progress in Earth and Planetary Science
Fig. 8 | Progress in Earth and Planetary Science

Fig. 8

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

Fig. 8

a–c Total concentrations of dissolved Si (CSi), Mg (CMg), Al (CAl), and Ca (CCa) in the fluid in equilibrium with pelitic schist (crust) for the P–T conditions along the upper surface of the slab in the a NE Japan, b Nankai, and c Cascadia subduction zones. d–f Total concentrations of dissolved Si (CSi), Mg (CMg), Al (CAl), and Ca (CCa) in fluid in equilibrium with peridotite (mantle) for the P–T conditions along the upper surface of the slab in the d NE Japan, e Nankai, and f Cascadia subduction zones. ΔpH = pH − pH(neutral) at each P–T condition. The P–T paths along the upper surface of the slab in the NE Japan, Nankai, and Cascadia subduction zones are from van Keken et al. (2018; Fig. 3)

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