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Axial Volcano, CASM

Fri, 2010-04-30 10:52 — dadmin
Feature ID in MGDS: 
Casm
Name Alias(es): 
CASM, Axial Seamount
Name Alias(es): 
Area 2B
Vent Sites: 
LamphereChimneys
Shepherd
T&Sspires
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: 
45.9900
Longitude: 
-130.0300
Ocean: 
Region: 
National Jurisdiction: 
Depth (m)
Depth of hydrothermal activity and/or deposits (m below sea level).
Maximum or Single Reported Depth: 
1580
Tectonic Setting Category: 
Full Spreading Rate (mm/a): 
56.0
Host Rock: 
MORB, E-MORB
Deposit Type: 
PMS, polymetallic massive sulfides
Notes on Vent Field Description: 
vent field and lava flow in northern area of caldera; Note: North Rift Zone diffuse flow vents to north of CASM (Herzig et al. 1997); Area 2B in Crane et al. (1985); small vent field with active sulfide deposits and low-temperature Fe oxide and silica chimneys in the caldera of an axial seamount; primarily low-temperature diffuse venting, phase separation; NeMO observatory, http://newport.pmel.noaa.gov/nemo; axial seamount (volcano), hotspot influence; Axial Seamount is the youngest seamount of the Cobb seamount chain which includes Cobb Seamount, Brown Bear, and Grizzly; Axial Seamount site is located on the Juan de Fuca Ridge near the intersection of the Cobb-Eikenberg-Brown Bear seamount chain and the axial rift
Notes Relevant to Biology: 
NotProvided
Year and How Discovered (if active, visual confirmation is listed first): 
1983 submersible Pisces IV
References
[References in brackets not consulted in full by InterRidge Coordinator 2009]
Discovery References (text): 
[CASM (Canadian American Seamount) expedition (1985) Hydrothermal vents on an axis seamount of the Juan de Fuca Ridge. Nature 313: 212-214.]
Other References (text): 
(towed thermistors indicated geothermal region only) Crane et al., J. Geophys. Res., 90, 727-744, 1985, The Distribution of Geothermal Fields on the Juan de Fuca Ridge, doi:10.1029/JB090iB01p00727
Embley et al., J. Geophys. Res., 95, B8, 12785-12812, 1990, High-Resolution Studies of the Summit of Axial Volcano, doi:10.1029/JB095iB08p12785
Herzig et al. (1997) Hydrothermal activity and rift-induced tracers at Axial (Juan de Fuca ridge): Results of cruise SO-109 of R/V Sonne-ROPOS. InterRidge News 6(1): 35-38.