Fig. 9
From: Phase diagram and density of SiO2–H2O fluid across critical conditions
First and second boiling processes with fluid water exsolution from the rising magma. a Schematic geological settings. b Thermodynamic paths in the 3D phase diagram for the boiling processes. The green surface represents VLE, the black grid represents SLE. The dark red, light red and gray lines (group marked with ①) indicate different initial conditions for the first boiling process (dark red line: T = 1389 K; xs = 0.5; light red line: T = 1370 K; xs = 0.5; grey line: T = 1389 K, xs = 0.45). The purple line marked with ② represents an illustrative path for the second boiling process. In (c), (d) and (e), we show the density changes of the fluid evolving along the four paths in (b). M: unsaturated melts before SLE and VLE; L: hydrous silicate melts; V: aqueous fluids