Natsushima 84-1 Knoll

Name Alias(es):

Vent Sites:

Activity:

active, confirmed

Maximum Temperature:

Max Temperature Category:

Low

Latitude:

27.5750

Longitude:

127.1417

Location on map:

Ocean:

N. Pacific

Region:

Okinawa Trough

National Jurisdiction:

Japan

Maximum or Single Reported Depth (mbsl):

1600

Minimum Depth (mbsl):

Tectonic setting:

back-arc spreading center

Full Spreading Rate (mm/a):

28.8

Volcano Number (if applicable):

Host Rock:

NotProvided

Deposit Type:

NotProvided

Notes on Vent Field Description:

first hydrothermal vent field discovered in Japanese waters; low temperature venting fluid

Notes Relevant to Biology:

no hydrothermal vent-endemic species reported as of Kojima (2002) review

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

1986 submersible Shinkai 2000

Discovery References (text):

[Kimura, et al. (1987) Submersible SHINKAI 2000 study on the central rift in the middle Okinawa Trough. JAMSTEC Tech. Rep. Spec. Issue 165-196 (in Japanese with English abstract)

Kimura et al. (1988) Active hydrothermal mounds in the Okinawa Trough backarc basin, Japan. Tectonophysics 145: 319-324].

Other References (text):

Ishibashi et al. (1988) Geochemical evidence for hydrothermal activity in the Okinawa Trough. Geochemical Journal 22: 107-114

Kojima (2002) Deep-sea chemoautosynthesis-based communities in the northwestern Pacific. Journal of Oceanography 58: 343-363.

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