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Tonga Arc, Volcano 18
Name Alias(es):
TA25
MGDS_FeatureID lowest in hierarchy:
Activity:
Maximum Temperature:
260
Latitude:
-24.5850
Longitude:
-176.9170
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
1465
Minimum Depth (mbsl):
400
Tectonic setting:
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
Kim (2011): confirmation with seafloor observation in 2011; Ju (2013): dives in 2011 ROV MAGNUM and 2012 ROV ROPOS, photographs of active vents, temperature 260 C, two black smokers discovered at eastern wall of caldera at depth approx. 1000 m; maximum sediment temperature of 13.8 deg C (Langley et al. 2005)
Notes Relevant to Biology:
Ju (2013): notable fauna: snail (Alviniconcha), mussel (Bathymodiolus), crab (Austinograea), shrimp (Nautilocaris), scale worm (polynoid)
Year and How Discovered (if active, visual confirmation is listed first):
2011 ROV MAGNUM; 2003 plume and dredge only
Discovery References (text):
(plume only) G. Massoth et al. G3 8, Q11008, doi:10.1029/2007GC001675, 2007, Multiple hydrothermal sources along the south Tonga arc and Valu Fa Ridge
(plume and dredge only) cruise SS02/2003 summary (http://www.marine.csiro.au/nationalfacility/voyagedocs/2003/0203s.htm).
Kim, Jonguk (2011) Exploration activities of KORDI for deep sea minerals development in the Pacific region. Presentation online, accessed 31 Oct. 2014: http://www.sopac.org/dsm/public/files/meetings/JKim_KORDI_R.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)
Langley et al. (2005) Preliminary Investigations Into the Geomicrobiology of Iron-Rich Seafloor Sediments Obtained From the Tonga Ridge. American Geophysical Union, Fall Meeting 2005, abstract #V51C-1507.
Ju, Se-Jong (2013) presentation to 37th Annual Conference of the Center for Oceans Law and Policy, May 2013, accessed 31 Oct. 2014: http://www.virginia.edu/colp/pdf/Seoul-Ju.pdf
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