SESCA

Name Alias(es):

southern Escanaba Trough

MGDS_FeatureID lowest in hierarchy:

Gorda

Vent Sites:

Activity:

active, inferred

Maximum Temperature:

Latitude:

40.7500

Longitude:

-127.5200

Location on map:

Ocean:

N. Pacific

Region:

Gorda Ridge

National Jurisdiction:

United States

Maximum or Single Reported Depth (mbsl):

3300

Minimum Depth (mbsl):

Tectonic setting:

mid-ocean ridge

Full Spreading Rate (mm/a):

55.4

Volcano Number (if applicable):

Host Rock:

sediment-hosted

Deposit Type:

PMS

Notes on Vent Field Description:

just north of DSDP Site 35; Baker et al. (1987): "Some sediments dredged at 40 45'N were also impregnated with asphaltic petroleum, presumably derived from in situ heating of terrestrial organic matter in the turbidites (KVENVOLDEN et al., 1986)"

Notes Relevant to Biology:

NotProvided

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

1986 sediments and heat-flow measurements

Discovery References (text):

KVENVOLDEN et al. (1986) Petroleum associated with polymetallic sulfide in sediment from Gorda Ridge. Science, 234, 1231-1234.

Other References (text):

Baker et al., Deep Sea Res. 34, 1461-1476, 1987, Evidence for high-temperature hydrothermal venting on the Gorda Ridge, northeast Pacific Ocean

[Zierenberg et al., Econ. Geol., 88, 2069-2098, 1993, Genesis of massive sulfide deposits on a sediment-covered spreading center, Escanaba Trough, southern Gorda Ridge].

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