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Starfish Seamount

Name Alias(es): 
Jean-Charcot Troughs
JCT
Northern Backarc Troughs
New Hebrides backarc troughs
NHBAT
Activity: 
Latitude: 
-12.2083
Longitude: 
167.6462
Location on map: 
Ocean: 
National Jurisdiction: 
Maximum or Single Reported Depth (mbsl): 
1600
Minimum Depth (mbsl): 
450
Tectonic setting: 
Volcano Number (if applicable): 
Host Rock: 
NotProvided
Deposit Type: 
NotProvided
Notes on Vent Field Description: 
northern New Hebrides arc; Note: the position provided here is for the Station 31 central volcanic complex in Maillet et al. (1995). Although Maillet et al. (1995) report this station as within the Vanikoro area of the Jean-Charcot Troughs, this location is west of the spreading axis and appears to be the same or very similar location to Starfish Seamount on the more recent SOLAVENTS FR03/2002 cruise; KAIYO 1989 cruise CH4 anomaly 400 mab, high methane/Mn ratio
Year and How Discovered (if active, visual confirmation is listed first): 
1989 plume only; 1989 towed camera survey did not confirm activity; 2002 plume and dredge only
Discovery References (text): 
Nakada et al. (1994) High-Na dacite from the Jean Charcot Trough (Vanuatu), Southwest Pacific. Mar. Geol. 116: 197-213
Maillet et al., 1995. Tectonics, magmatism, and evolution of the New Hebrides backarc troughs (Southwest Pacific). pp.177-235, in Backarc Basins: Tectonics and Magmatism, ed. Taylor, B., Plenum Press, New York
SOLAVENTS FR03/2002 cruise summary (http://www.marine.csiro.au/datacentre/process/data_files/cruise_docs/fr200203sum.pdf).
Other References (text): 
McConachy (2002) Submarine Hydrothermal Processes in Volcanic Arcs, Back Arcs and Continental Shelf Settings in the SW Pacific (http://smedg.org.au/McCJune02.pdf)
[McConachy et al., CSIRO Exploration and Mining Rpt Cruise report 1026F, 402 pp., 2002].