Home

Animal Farm

Fri, 2010-04-30 10:53 — dadmin
Feature ID in MGDS: 
AnimalFarm
Name Alias(es): 
18 36'S, EPR
Activity: 
Temperature
If provided, Maximum temperature in degrees Celsius. If provided, Maximum temperature category distinguishes High (e.g., chimneys, black smokers) vs. Low (e.g., diffuse flow).
Maximum Temperature Category: 
Low
Location
Latitude: 
-18.6080
Longitude: 
-113.4000
Ocean: 
Region: 
National Jurisdiction: 
Depth (m)
Depth of hydrothermal activity and/or deposits (m below sea level).
Maximum or Single Reported Depth: 
2675
Minimum Depth: 
2660
Tectonic Setting Category: 
Full Spreading Rate (mm/a): 
147.2
Host Rock: 
MORB
Deposit Type: 
NotProvided
Notes on Vent Field Description: 
active in 1993 and 1999, inactive in 2004; note: "HUMP zone" in Auzende et al. (1996) extends from 18 22' to 18 37'S; hydrothermal plumes virtually continuous between 17 20' and 18 40'S
Notes Relevant to Biology: 
Auzende et al. (1996) has photo of Calypotogena, "In the southern part of the Hump area, hydrothermal chimneys are occupied by a large number of animals, especially alvinellid-worms, crabs (Plate 2e) and fish"; Alvin dive 3343 log in 1999 includes "Anemones, Clams, Crabs, Other worms, Sea cucumbers, Sea stars, Tube worms, Vent fish, Mussels, barnacles"; 2004 BIOSPEEDO cruise noted dead clams, mussels
Year and How Discovered (if active, visual confirmation is listed first): 
1993 submersible Nautile
References
[References in brackets not consulted in full by InterRidge Coordinator 2009]
Discovery References (text): 
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
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.