Fig. 6 | Nature Communications

Fig. 6

From: Saline aqueous fluid circulation in mantle wedge inferred from olivine wetting properties

Fig. 6

60° isopleths of dihedral angle in depth–temperature space The thick brown, red–orange, and orange curves are the 60° isopleths in the low-NaCl-concentration systems; the yellowish-brown dotted curve is the 60° isopleth for the 27.5 wt% NaCl; and the blue dashed curve is the 60° isopleth in the H2O system. In pressure and temperature regions higher than the 60° isopleths, θ is smaller than 60°. The depth–temperature paths of down-dragged mantle at the base of mantle wedge are denoted by five thin solid lines of different colors for intermediate-temperature and cold subduction zones4,51, where high electrical conductivity has been detected in the deep forearc crust. The slab-surface depths beneath the forearc conductor and the arc volcano are shown at the right side of the panel for each subduction zone77. The gray dotted line shows the hydrous peridotite solidus that is after Green67. It should be noted that this hydrous peridotite solidus was constrained in a fertile peridotite system; the solidus temperature in a relatively depleted peridotite should be higher than that shown in this figure. The stability of antigorite is after Bromiley and Pawley78 and Evans et al.79, and that stability of chlorite is after Till et al.11. Atg antigorite, Fo forsterite, Ta talc, En enstatite, Chl chlorite.

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