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Lobster
Name Alias(es):
Rochambeau Rifts
RR
Niuafo’ou Spreading Center
NSC
Lobster Caldera
MGDS_FeatureID lowest in hierarchy:
Activity:
Latitude:
-15.3330
Longitude:
-176.2830
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
1500
Tectonic setting:
Full Spreading Rate (mm/a):
108.6
Volcano Number (if applicable):
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
cruise SS07/2008 report: "the Rochambeau Rifts (RR) is characterised by diffuse magmatism over a wide region of rifted crust with no single developed spreading centre, together with some localisation of magmatic activity in very large volcanic edifices, some of which are hydrothermally active.", Lobster is in Rift Zone 2 "A hydrocast (NLH-18) ... with a distinct particulate plume ... identified at 60m off bottom in the SE corner of the 1500m-deep summit caldera (2.5 km diameter) of Lobster."; note additional plume surveys were conducted in 2010 and reported by Lupton et al. (2012)
Year and How Discovered (if active, visual confirmation is listed first):
2008 plume and dredge only
Discovery References (text):
Arculus et al. (2008) cruise SS07/2008 report, http://www.cmar.csiro.au/datacentre/process/data_files/cruise_docs/SS200807sum.pdf, accessed 27 May 2015
Lupton, J. E., R. J. Arculus, J. Resing, G. J. Massoth, R. R. Greene, L. J. Evans, and N. Buck (2012), Hydrothermal activity in the Northwest Lau Backarc Basin: Evidence from water column measurements, Geochem. Geophys. Geosyst., 13, Q0AF04, doi:10.1029/2011GC003891.
RDF link: