Fig. 1: Bathymetry and geological setting of the Dragon Horn area segment 28 on the SouthWest Indian Ridge (SWIR).

a Regional location of the Dragon Horn area on the SWIR. b Summary bathymetry map with the distribution of hydrothermal fields (triangle markers) and geological tectonic features: black dots are the locus of the detachment fault breakaways, magenta hachured lines are the detachment fault terminations, OCC1 and OCC2 are oceanic core complexes exposed by fault slip, and NTD is the non-transform discontinuity. Sea-surface magnetic survey lines (L1, L2, L3) are shown by magenta lines. Autonomous underwater vehicle (AUV) tracklines are shown by blue, cyan, and gray lines.