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EPR, 17 34'S
Name Alias(es):
Mk 4
RM23
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Calvin
Hobbes
Suzie
Miss Wormwood
Pit
Spike
Activity:
Maximum Temperature:
349
Latitude:
-17.5667
Longitude:
-113.2333
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
2600
Minimum Depth (mbsl):
2590
Tectonic setting:
Full Spreading Rate (mm/a):
146.7
Host Rock:
MORB
Deposit Type:
PMS
Notes on Vent Field Description:
Renard et al. (1985) say that this is a "non-rifted segment"; hydrothermal plumes virtually continuous between 17 20' and 18 40'S; Haymon and White (2004) separate the 17 26'S, 17 34'S, 17 37'S, and 17 44' active fields on 3rd order ridge segments
Notes Relevant to Biology:
2004 BIOSPEEDO cruise noted mussels at Calvin, alvinellids at Hobbs and Miss Wormwood
Year and How Discovered (if active, visual confirmation is listed first):
1994 submersible Shinkai 6500; 1996 Argo II towed video
Discovery References (text):
Fujioka et al. (1995) Active hydrothermal systems of a super-fast spreading ridge, Southern East Pacific Rise (13 58'S to 18 26'S). InterRidge News 4(1): 7-10.
Other References (text):
Urabe et al. (1998) Japanese Ridge Flux Project Group has started long-term seafloor monitoring in the southern East Pacific Rise. InterRidge News 7(1): 41-44
Embley et al., Earth Planet. Sci. Lett. 163, 131-147, 1998, Geological, chemical, and biological evidence for recent volcanism at 17.5ºS: East Pacific Rise
Haymon and White (2004) Fine-scale segmentation of volcanic/hydrothermal systems along fast-spreading ridge crests. Earth and Planetary Science Letters 226: 367-382
Jollivet, D. et al. (2004) The BIOSPEEDO cruise: a new survey of hydrothermal vents along the South East Pacific Rise from 7 24'S to 21 33'S. InterRidge News 13: 20-26.
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