A Metastable Aluminosilica Compound for Aluminum and Water Transport to the Upper Mantle

Figure 1

The hypothetical binary equilibrium phase diagram A-B showing the position of a (deep) metastable eutectic with a composition “AB’’ defined at the intersect of the metastable extensions of the liquidus surface (dashed lines) and located in between the compositions of both (stable) eutectic points on the liquidus surface at the top of the diagram (solid lines). This figure was modified after [18].