SEIR, 75, near Amsterdam Island
Notes on Vent Field Description:
Boomerang Seamount lies along the axis of the Southeast Indian Ridge and marks the site of the Amsterdam-St. Paul hotspot; Johnson et al. (2000): "Water column profiles reveal a 1.7°C temperature anomaly and a 0.3 V stepped nephelometer (water column turbidity) anomaly within the caldera, nearly an order of magnitude larger than other hydrothermal plume anomalies we measured."
Year and How Discovered (if active, visual confirmation is listed first):
1996 plume and wax core only
Discovery References (text):
(plume only) Scheirer et al., Geophys. Res. Lett., 25, 97-100, 1998, Detection of hydrothermal plumes along the Southeast Indian Ridge near the Amsterdam-St. Paul Plateau
(plume and wax core) Johnson et al. (2000) Boomerang Seamount: the active expression of the Amsterdam-St. Paul hotspot, Southeast Indian Ridge. Earth and Planetary Science Letters 183: 245-259.