Fig. 6
Seafloor massive sulfide mineralogy. (a, b) SEM images of polished thin sections. Ccp—chalcopyrite, Is—isocubanite, Po—pyrrhotite, Py—pyrite. (c) Sulfide compositions as molar proportions in Cu–Fe–S space as derived by energy dispersive X-ray spectroscopy. Pyrite, pyrrhotite, and phases compositionally close to isocubanite dominate the mineral assemblage. Samples recovered in dredge PS55/08829 (dashed line in Fig. 2a). ‘Ideal stoich.’ refers to ideal stoichiometric compositions.
