Systematics of metals, metalloids, and volatiles in MORB melts: Effects of partial melting, crystal fractionation and degassing (a case study of Macquarie Island glasses)

► Glasses of Macquarie Island ophiolite represent melting and fractionation processes. ► Relative compatibility of correlated major, trace and volatile elements is estimated. ► Behaviour of metals, metalloids and volatile elements during melting is evaluated. ► Mantle source composition is quantified for volatiles (H2O, Cl, B) and some metals.