Fig. 5

Influence of fluid input (\(dm_{{\rm H}_2{\rm O}}\)) on the volume fraction of actinolite relative to the total amphibole \(Y_{act}\), as defined by Okamoto and Toriumi (2005). The circles and line indicate the calculated result for case III, in which the original rock is equilibrated at 500 °C and 1.0 GPa, and where the amphibole core is barroisite. The squares and dashed line indicate the calculated result for case IV, in which the original rock is equilibrated at 400 °C and 0.8 GPa, and where the amphibole core is winchite