I have some pyroxenites with typical cumulatic texture, if I want to calculate the equilibrium melts with these pyroxenites or cumulates, how could I deal with it? If anyone had done this, please tell me some ways or some references. Thank you.
if you have the trace element concentrations of clinopyroxene, you can calculate the trace elements composition of the parental liquid using the experimentally determined partition coefficients of Ionov et al. 2002 Journal of Petrology, 43, 2219-2259.
Agree with the answers above. Trace elements are they key, especially REE. The best way to analyse this is LA-ICP-MS. Melt composition can then be estimated using published distribution coefficients between solids and melt.