Green Seamount

Name Alias(es):

Larson Seamounts, Volcano "B"

MGDS_FeatureID lowest in hierarchy:

Vent Sites:

Activity:

Maximum Temperature:

Max Temperature Category:

Latitude:

20.8033

Longitude:

-109.2833

Location on map:

Ocean:

Region:

National Jurisdiction:

Maximum or Single Reported Depth (mbsl):

2000

Minimum Depth (mbsl):

Tectonic setting:

Full Spreading Rate (mm/a):

63.0

Volcano Number (if applicable):

Host Rock:

MORB, E-MORB

Deposit Type:

PMS, fe-oxide & silica deposits with massive sulfide

Notes on Vent Field Description:

Fe oxide sediments, gossans, relict sulfide chimneys, and Fe-Mn crusts on a small off-axis seamount adjacent to the EPR

Notes Relevant to Biology:

NotProvided

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

1982 submersible Alvin observed only inactive

Discovery References (text):

[Lonsdale et al., Mar. Tech. J., 16, 54-61, 1982, Metallogenesis at Seamounts on the East Pacific Rise]

Alt et al., Geol. Soc. Am. Bull., 98, 157-168, 1987, Hydrothermal sulfide and oxide deposits on seamounts near 21°N, East Pacific Rise.

Other References (text):

Batiza, R., and D. Vanko (1984), Petrology of Young Pacific Seamounts, J. Geophys. Res., 89(B13), 11, 235–11, 260.

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