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EPR, 18 10'S
Name Alias(es):
Akorta
RM29
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Akorta
Activity:
Maximum Temperature:
305
Latitude:
-18.1700
Longitude:
-113.3440
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2700
Tectonic setting:
Full Spreading Rate (mm/a):
147.0
Volcano Number (if applicable):
Host Rock:
MORB
Deposit Type:
NotProvided
Notes on Vent Field Description:
Alvin dive 3351 log in 1999 includes "Basalt lava, Hi temp vents, Inactive vent deposits, Lo temp vents"; hydrothermal plumes virtually continuous between 17 20' and 18 40'S
Notes Relevant to Biology:
Alvin dive 3351 log in 1999 includes "Anemones, Non-vent fish, Sea cucumbers, Sea stars, Soft sediment, Sponges, Vent fish"
Year and How Discovered (if active, visual confirmation is listed first):
1993 submersible Nautile; 1983 temperature and light attenuation anomalies
Discovery References (text):
(temperature anomalies) Backer et al., Hydrothermal activity and sulphide formation in axial valleys of the East Pacific Rise crest between 18 and 22°S, Earth Planet. Sci. Lett., 72, 9-22, 1985
JM Auzende et al. (1996) Recent tectonic, magmatic, and hydrothermal activity on the East Pacific Rise between 17°S and 19°S: Submersible observations. J Geophys Res 101(B8): 17995-18010.
Other References (text):
(plume only) Baker, E., and T. Urabe (1996) Extensive distribution of hydrothermal plumes along the superfast spreading East Pacific Rise, 13°30′-18°40′S, J. Geophys. Res., 101(B4), 8685-8695.
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