Hello everyone,
I have been performing rhyolite-MELTS fractional crystallization calculations from typical tholeiitic basalts (at FMQ+1, 0.5 wt % H2O, and 4 kbars). Although my resulting melt compositions seem realistic (as well as the CIPW normative mineralogies), the fractionated phases are completely off. For some models, the fractionated spinel content ends up being 50% (in addition to cpx). I am aware that MELTS and pMELTS overestimate the liquidus T of spinel, but does rhyolite-MELTS also highly overestimate its stability?
Thank you very much
Arya
I have been performing rhyolite-MELTS fractional crystallization calculations from typical tholeiitic basalts (at FMQ+1, 0.5 wt % H2O, and 4 kbars). Although my resulting melt compositions seem realistic (as well as the CIPW normative mineralogies), the fractionated phases are completely off. For some models, the fractionated spinel content ends up being 50% (in addition to cpx). I am aware that MELTS and pMELTS overestimate the liquidus T of spinel, but does rhyolite-MELTS also highly overestimate its stability?
Thank you very much
Arya