Notes on Vent Field Description:
Bach et al. (2002): "We found the clearest hydrothermal plume signal between Dredges 53 and 56...", "If our deductions regarding the location of the apparent venting on the rift valley wall are correct, hydrothermal circulation here occurs far from any volcanic structures on the floor of the axial valley. We suggest instead that ultramafic rocks likely host the active hydrothermal system here, although a relationship to localized basaltic volcanism cannot be ruled out.", "Twenty-five out of thirty-eight dredge hauls recovered dominantly ultramafic rocks from between 11.5°E and 14.5°E. "
Notes Relevant to Biology:
Year and How Discovered (if active, visual confirmation is listed first):
2000-2001 plume and dredge only
Discovery References (text):
Bach et al., 2002, Geochem. Geophys. Geosyst. 3, Discovery of ancient and active hydrothermal systems along the ultra-slow spreading Southwest Indian Ridge 10°-16°E, doi:10.1029/2001GC000279.
Other References (text):
Baker et al., 2004, Geochem. Geophys. Geosyst, 5, Q08002, Hydrothermal venting in magma deserts: The ultraslow-spreading Gakkel and Southwest Indian Ridges, doi:10.1029/2004GC000712.