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CLSC, A3
Name Alias(es):
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Activity:
Maximum Temperature:
Max Temperature Category:
Latitude:
-18.6000
Longitude:
-176.4500
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2500
Minimum Depth (mbsl):
2250
Tectonic setting:
Full Spreading Rate (mm/a):
87.9
Host Rock:
BABB, MORB, low-K andesite
Deposit Type:
PMS, polymetallic massive sulfides
Notes on Vent Field Description:
Falloon et al. (1992): "Lavas sampled on the CLSC were associated with active hydrothermal sulphide chimneys occurring at the base of a collapsed caldera structure on the central volcanic axial high."; could this be the same as found on CLSC on cruise SS07/2008? "distinctive hydrothermal plume was detected at the southern end of the southern ridge"; location is close to a plume target on CL6 on cruise SS02/2009 (http://www.marine.csiro.au/nationalfacility/voyagedocs/2009/MNF-SS2-09_sum.pdf); Fe & Mn crusts on old lava flows nearby but east of spreading axis (Von Stackelberg et al., 1985)
Notes Relevant to Biology:
Year and How Discovered (if active, visual confirmation is listed first):
1990 submersible Mir
Discovery References (text):
[Lisitsyn et al., International Geology Review, 34, 828-847, 1992, HYDROTHERMAL FORMATIONS IN THE NORTHERN PART OF THE LAU BASIN, PACIFIC OCEAN
Falloon et al. (1992) Petrology and geochemistry of back-arc basin basalts from Lau Basin spreading ridges at 15°, 18° and 19°S. Mineralogy and Petrology 47: 1-35.]
Other References (text):
[Von Stackelberg et al., Bundesanstalt Geowissenschaften Rohstoffe Circular 2, 3-14, 1985.]
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