What are the function expressions between oxygen fugacity and temperature for FMQ, NNO, HM oxygen buffers in silicate magma?

Oxygen fugacity (fO2) is positively correlated with temperature (T) in silicate magma and often described as mineral assemblage buffer such as Fayalite-magnetite-quartz (FMQ), Ni-NiO(NNO),...

10 October 2017 8,845 6 View