The geometry of large-scale extensional deformation in the southwestern Cyclades archipelago is a controversially discussed issue. Recent studies suggest a bivergent (i.e., coeval top-to-the-S and top-to-the-N shear) geometry of early Miocene extensional deformation. On Sikinos Island, top-to-the-S shear structures in the Cycladic basement are overprinted by a prominent ductile-to-brittle top-to-the-N extensional shear zone in...

Seafloor massive sulfides form in various marine hydrothermal settings, particularly within volcanic arcs, where magmatic fluids may contribute to the metal budget of the hydrothermal system. In this study, we focus on the Kolumbo volcano, a submarine volcanic edifice in the central Hellenic Volcanic Arc hosting an active hydrothermal system. Diffuse sulfate-sulfide chimneys form a Zn-Pb massive sulfide mineralization with ele...