Comments on some misconceptions in igneous and experimental petrology and methodology: a reply

rate ’ of cpx and opx. Isobaric melting experiments show INTRODUCTION a> b, but the abyssal peridotite data suggest b> a, i.e. I recently showed (Niu, 1997) that proportions of residual opx would contribute more than cpx to the melt during minerals in abyssal peridotites (e.g. Dick, 1989; Johnson melting beneath ocean ridges. As abyssal peridotites et al., 1990; Johnson & Dick, 1992) exhibit systematic are apparently metamorphosed and deformed under variations with whole-rock MgO content. I also showed subsolidus conditions (e.g. Niu, 1997; Niu et al., 1997