Fig. 15

Petrogenetic grid from 400 to 900 °C and 0.0–5.0 GPa using Figs. 11 and 12 for low pressure phase relations (0.1–0.4 GPa), data from Stucki (2001), Frost (1976) and Niida and Green (1999) for medium pressures (0.4–1.0 GPa). Mysen and Boettcher (1975), Jenkins (1983), Niida and Green (1999) and Fumagalli and Poli (2005) for high pressures (1.0–5.0 GPa). The red bar shows the intersection of reactions 5–7, and plagioclase stability is indicated by the dashed line according to Jenkins (1983). *Note that either Mg-hornblende or chlorite may be the limiting phases for garnet (Grt), clinopyroxene and pargasite (Prg) production depending on the chosen Ca and Al bulk, including Na in natural rocks