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Tonga Arc, Volcano A
Name Alias(es):
Target A
MGDS_FeatureID lowest in hierarchy:
Activity:
Latitude:
-20.8600
Longitude:
-175.5500
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
700
Minimum Depth (mbsl):
400
Tectonic setting:
Volcano Number (if applicable):
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
depth approximate; cruise report SS11/2004 (http://www.marine.csiro.au/nationalfacility/voyagedocs/2004/Summary_SS11-2004.pdf): "0.05% transmission anomaly centered at 500m and extending over a range from 450 to 600m in NH-01 (north flank of the north cone of Volcano A); ~ 0.02% centered (weakly) at 325m in NH-02 (south flank of the same cone); ~0.03% centred sharply at 300m and diffusively at 500m in NH-03 on the northern flank of the south cone of Volcano A"
Year and How Discovered (if active, visual confirmation is listed first):
2004 plume only
Discovery References (text):
cruise report SS11/2004 (http://www.marine.csiro.au/nationalfacility/voyagedocs/2004/Summary_SS11-2004.pdf).
Other References (text):
Arculus "Arc-backarc systems of northern Kermadec-Tonga" (http://www.crownminerals.govt.nz/cms/pdf-library/minerals/conferences-1/045_papers_44.pdf)
RDF link: