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NWLSC, Southern Caldera
Name Alias(es):
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Activity:
Latitude:
-15.9000
Longitude:
-177.4166
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2160
Tectonic setting:
Full Spreading Rate (mm/a):
76.4
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
NWLSC surveyed on cruise SS07-2008 NoLauVE cruise, cruise report (http://www.cmar.csiro.au/datacentre/process/data_files/cruise_docs/SS200807sum.pdf): "The Northwest Lau Spreading Centre (NWLSC) forms an asymmetric, inflated ridge terminated by right-lateral transcurrent faulting at both northern and southern terminations, with two large calderas... astride the Ridge."; Lupton et al. (2012): "Hydrothermal activity in the Southern Caldera was revealed by a sharp decrease in light transmission, TMn, and 3He at depths below 2000 m in cast NLH-30, which was positioned near the western caldera wall", "consistent with the presence of low temperature diffuse venting"
Notes Relevant to Biology:
Year and How Discovered (if active, visual confirmation is listed first):
2008 plume only
Discovery References (text):
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.
Other References (text):
RDF link: