Kasuga 3 Seamount

Name Alias(es):

MGDS_FeatureID lowest in hierarchy:

Mariana

Vent Sites:

Activity:

active, confirmed

Maximum Temperature:

Latitude:

21.3833

Longitude:

143.6000

Location on map:

Ocean:

N. Pacific

Region:

Mariana Arc

National Jurisdiction:

United States : Northern Mariana Islands and Guam

Maximum or Single Reported Depth (mbsl):

1140

Minimum Depth (mbsl):

Tectonic setting:

arc volcano

Full Spreading Rate (mm/a):

Volcano Number (if applicable):

Host Rock:

basalts to shoshonites, dacite

Deposit Type:

NotProvided

Notes on Vent Field Description:

9.3 deg C fluid venting from base of mound of lava rubble, plus hydrothermal deposits include what appears to be vent orifices; note: plume not detected in 2003

Notes Relevant to Biology:

NotProvided

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

1987 submersible Alvin

Discovery References (text):

McMurtry et al (1993) Unusual geochemistry of hydrothermal vents on submarine arc volcanoes: Kasuga Seamounts, Northern Mariana Arc. EPSL 114: 517-528.

Other References (text):

Embley, R et al (2004) Explorations of Mariana Arc volcanoes reveal new hydrothermal systems. EOS, Trans. AGU 85(4): 37, 40.

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