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Aurora

Fri, 2010-04-30 10:53 — dadmin
Feature ID in MGDS: 
Aurora
Name Alias(es): 
Site 1, Gakkel Ridge
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: 
NotProvided
Location
Latitude: 
82.8833
Longitude: 
-6.2500
Ocean: 
Region: 
National Jurisdiction: 
Depth (m)
Depth of hydrothermal activity and/or deposits (m below sea level).
Maximum or Single Reported Depth: 
4100
Tectonic Setting Category: 
Full Spreading Rate (mm/a): 
13.1
Host Rock: 
MORB, E-MORB, ultramafic
Deposit Type: 
PMS
Notes on Vent Field Description: 
southern flank of saddle in center of axial rift valley; note Pedersen has 68 15'W; Pedersen et al. (2009): "massive sulphides were recovered … where the Lena trough transitions into the Gakkel Ridge"
Notes Relevant to Biology: 
abundant macrofauna observed on camera tow
Year and How Discovered (if active, visual confirmation is listed first): 
2001 shimmering water in camera tow and sulfide chimney in dredge
References
[References in brackets not consulted in full by InterRidge Coordinator 2009]
Discovery References (text): 
Michael et al (2001) The Arctic Mid-Ocean Ridge Expedition -AMORE 2001- Seafloor Spreading at the Top of the World. AGU Fall Meeting 2001, Abstract T11B-0853
Edmonds, H.N. et al. (2003) Discovery of abundant hydrothermal venting on the ultraslow-spreading Gakkel ridge in the Arctic Ocean. Nature 421: 252-256.
Other References (text): 
Michael et al. (2001) Results of the Arctic Mid-Ocean Ridge Expedition - AMORE 2001- Seafloor Spreading at the Top of the World. InterRidge News 10(2): 57-60
Michael, P.J. et al. (2003) Magmatic and amagmatic seafloor generation at the ultraslow-spreading Gakkel ridge, Arctic Ocean. Nature 423: 956-961
Baker et al., 2004, Geochem. Geophys. Geosyst, 5, Q08002, Hydrothermal venting in magma deserts: The ultraslow-spreading Gakkel and Southwest Indian Ridges, doi:10.1029/2004GC000712.