Rodingitization and carbonation, associated with serpentinization of Triassic ultramafic cumulates and lavas in Othris, Greece

More significant rodingitization affected mafic doleritic dykes that intrude wehrlites: this alteration occurred in parallel to serpentinization of hosting ultramafics via subsequent circulation of relatively alkaline and hydrous fluids. We have calculated that this occurred under low to moderate P-T conditions (180-320 °C, P ≈ 2-5 kbar). Circulation of Ca-rich fluids at shallower crustal levels was responsible for local carbonation phenomena, mostly affecting ultramafic and mafic pillow lavas.