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 s...

Abstract Prior to and during eruptions, magma is stored transported within volcanic igneous plumbing systems (VIPS) that comprise a network of reservoirs sheet intrusions. The study these VIPS requires the combination knowledge from fields petrology, geochemistry, thermodynamic modelling, structural geology, volcano geodesy, geophysics, which express physical, chemical, thermal complexity proce...