MAR, 23 35'N

Name Alias(es):

MGDS_FeatureID lowest in hierarchy:

MAR

Vent Sites:

Activity:

inactive

Maximum Temperature:

Max Temperature Category:

NotApplicable

Latitude:

23.5833

Longitude:

-45.0000

Location on map:

Ocean:

N. Atlantic

Region:

N MAR

National Jurisdiction:

high seas

Maximum or Single Reported Depth (mbsl):

3500

Minimum Depth (mbsl):

Tectonic setting:

mid-ocean ridge

Full Spreading Rate (mm/a):

24.1

Volcano Number (if applicable):

Host Rock:

NotProvided

Deposit Type:

VSD, disseminated sulfides

Notes on Vent Field Description:

quartz vein in altered basalt with disseminated sulfides; sampled at Kane Fracture Zone "active" comer of the ridge-transform intersection

Notes Relevant to Biology:

Year and How Discovered (if active, visual confirmation is listed first):

1980 submersible Alvin did not observe hydrothermal activity

Discovery References (text):

Delaney et al., J Geophys. Res., 92(B9), 9175-9192, 1987, Quartz-Cemented Breccias From the Mid-Atlantic Ridge: Samples of a High-Salinity Hydrothermal Upflow Zone

Kelley & Delaney, Earth Planet. Sci. Let., 83, 53-66, 1987, Two-phase separation and fracturing in mid-ocean ridge gabbros at temperatures greater than 700 C.

Other References (text):

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