Skip to main content
Fig. 31 | Progress in Earth and Planetary Science

Fig. 31

From: The Atlantis Bank Gabbro Massif, Southwest Indian Ridge

Fig. 31

Selected samples collected on Shinkai 6500 Dive 653 on the 57° 21′ E Fault Face (Fig. 29c). a Heavily fractured, chloritized, greenschist facies diabase in contact with talc-serpentine schist from the fault gouge at the lip of the bench above the high-angle normal fault at 57° 22′ E. Note “blackwall” zone in the dike margin due to reaction with the enclosing sheared serpentinite. Apparent boudinage of the diabase may actually reflect the development of a dike-finger structure due to melt intrusion approximately perpendicular to the cut face of the sample through sheared serpentinite. b Polymict cataclasite with coarse gabbro and diabase clasts in a fine-grained matrix from detachment fault footwall on the bench above the normal fault. Note the thin 1–3 mm manganese crust on the upper side of the sample

Back to article page