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FRSC, South Central
Name Alias(es):
South Central Fonualei
FRSC_2
FRSC02
MGDS_FeatureID lowest in hierarchy:
Activity:
Latitude:
-16.6667
Longitude:
-174.5167
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
1820
Minimum Depth (mbsl):
1400
Tectonic setting:
Full Spreading Rate (mm/a):
75.4
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
note: Nautilus Minerals had camera tow and FRSC02 sampled in 2009 Chief Sci R. Arculus (http://www.nautilusminerals.com/s/Media-NewsReleases.asp?ReportID=352245&_Title=Nautilus-Confirms-High-Grades-in-Phase-One-of-2009-Tongan-Exploration), (http://www.marketwire.com/press-release/Nautilus-Minerals-Inc-TSX-NUS-995322.html); southern section of line NEL11a on cruise SS02/2009 (http://www.marine.csiro.au/nationalfacility/voyagedocs/2009/MNF-SS2-09_sum.pdf): "Upon post-processing of the NEL11a southern extent tow data, we resolved another target approximately 5km south of the site central venting area. This site lies on a small ridge line between NEL11a and NEL11b and was identified by significant Eh response on the two lines."; located between Stations RC133 and RC132 reported by German et al. (2006); Baker et al. 2019: sites 22 to 25 with spreading rate 21 mm/year in Table 1;
Year and How Discovered (if active, visual confirmation is listed first):
2004 plume only; 2006 plume and chimney samples; 2009 camera tow and sampling (activity not confirmed)
Discovery References (text):
(plume only) German, C. et al. (2006) Hydrothermal exploration of the Fonualei Rift and Spreading Center and the Northeast Lau Spreading Center. Geochem. Geophys. Geosyst. 7, 2006GC001324;
(plume and chimney samples) Kim, J. et al. (2009) Venting sites along the Fonualei and Northeast Lau Spreading Centers and evidence of hydrothermal activity at an off-axis caldera in the northeastern Lau Basin. Geochemical Journal 43: 1-13;
cruise SS02/2009 summary (http://www.marine.csiro.au/nationalfacility/voyagedocs/2009/MNF-SS2-09_sum.pdf);
Other References (text):
SRK Consulting (2011) Nautilus Minerals Incorporated NI43-101 Technical Report 2010 PNG, Tonga, Fiji, Solomon Islands, New Zealand, Vanuatu and the ISA. Document Reference: NAT007 Nautilus 43-101 Technical Report 2011 Rev3.docx;
Baker ET, Walker SL, Massoth GJ and Resing JA (2019) The NE Lau Basin: Widespread and Abundant Hydrothermal Venting in the Back-Arc Region Behind a Superfast Subduction Zone. Front. Mar. Sci. 6:382. doi: 10.3389/fmars.2019.00382;
RDF link: