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EPR, 8 38'N
Name Alias(es):
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Activity:
Maximum Temperature:
Max Temperature Category:
Latitude:
8.6333
Longitude:
-104.2000
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2550
Minimum Depth (mbsl):
Tectonic setting:
Full Spreading Rate (mm/a):
105.2
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
Bohnenstiehl et al. (2003): "March 2, 2001, Autonomous Underwater Hydrophones (AUHs) monitoring the equatorial East Pacific Rise (EPR) detected a sequence of earthquakes distributed along the ridge axis between 8°37'N and 8°42'N", "The most significant hydrothermal signals were detected south of 8°38.34’N, with minor anomalies to the north", "these signals may represent chronic venting in the area, which may have been rejuvenated by magmatic and seismic processes associated with the 2001 swarm. This interpretation is supported by the recovery of sulfides during a 1989 dredge across the eastern ridge near 8°38'N (C. Langmuir, pers. comm., 2003)."; Alvin dive 3925 log: "Discovery of a diffuse hydrothermal field with unusual fauna. No fresh lavas, but extinct sulfides discovered in lava field. "
Notes Relevant to Biology:
Alvin dive 3925 includes "Tube worms, Other worms, Vent fish, Sponges, Non-vent fish, Tunicate, Sea cucumbers, Sea stars, Sponges, Anemones"
Year and How Discovered (if active, visual confirmation is listed first):
2003 submersible Alvin; 1989 dredge only; 2002 plume only
Discovery References (text):
Bohnenstiehl et al., RIDGE 2000 Events, 1, 18-20, 2003, Anomalous Seismic Activity at 8° 37-42' N on the East Pacific Rise: Hydroacoustic Detection and Site Investigation.
Other References (text):
RDF link: