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Boomerang Seamount
Name Alias(es):
SEIR, 75, near Amsterdam Island
MGDS_FeatureID lowest in hierarchy:
Activity:
Latitude:
-37.7217
Longitude:
77.8250
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
850
Minimum Depth (mbsl):
650
Tectonic setting:
Full Spreading Rate (mm/a):
64.4
Volcano Number (if applicable):
Host Rock:
NotProvided
Deposit Type:
NotProvided
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.
RDF link: