SWIR, Plume 5

Name Alias(es):

Vent Sites:

Activity:

active, inferred

Maximum Temperature:

Latitude:

-27.9170

Longitude:

64.4500

Location on map:

Ocean:

Indian

Region:

SWIR

National Jurisdiction:

high seas

Maximum or Single Reported Depth (mbsl):

4000

Minimum Depth (mbsl):

Tectonic setting:

mid-ocean ridge

Full Spreading Rate (mm/a):

9.4

Volcano Number (if applicable):

Host Rock:

NotProvided

Deposit Type:

NotProvided

Notes on Vent Field Description:

Convincing evidence of active hydrothermal circulation on an ultra-slow ridge was first discovered in 1997 at several locations between 58.2° and 65.8°E on the Southwest Indian Ridge (SWIR) during a plume survey using optical sensors; failed to find active vent on Shinkai 6500 dive in 1998

Notes Relevant to Biology:

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

1997 plume only

Discovery References (text):

(plume only) German et al., Nature 395, 490-493, 1998, Hydrothermal activity along the southwest Indian ridge.

Other References (text):

Fujimoto et al., InterRidge News 8(1), 22-24, 1999, First submersible investigations of mid-ocean ridges in the Indian Ocean

SOHRIN et al. (1999) CTD observations to search for hydrothermal activity on the Southwest Indian Ridge and the Central Indian Ridge just north of the Rodriguez Triple Junction: the Yokosuka/Shinkai MODE'98 Leg 3 INDOYO cruise. JAMSTEC Journal of Deep Sea Research 15: 7-11.

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