“…Therefore, muscovite is often considered to be the most suitable minerals for constraining the timing of mylonitization using 40 Ar/ 39 Ar dating methods. Available data show that muscovite porphyroclasts might be incompletely reset in the mylonization condition of less than 500°C (e.g., Villa, 1998;Gouzu et al, 2006;Itaya et al, 2009;Nuong et al, 2008Nuong et al, , 2009. Taking account into the dynamic recrystallization temperature of 300-500°C for our samples (Table 1), muscovite separates out of the matrix were selected, in this study, for constraining the deformational events.…”