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S-OH1
Name Alias(es):
NTO8
MGDS_FeatureID lowest in hierarchy:
Vent Sites:
Activity:
Maximum Temperature:
Latitude:
34.5330
Longitude:
-36.8500
Location on map:
Ocean:
Region:
National Jurisdiction:
Maximum or Single Reported Depth (mbsl):
3000
Minimum Depth (mbsl):
Tectonic setting:
Full Spreading Rate (mm/a):
21.2
Host Rock:
NotProvided
Deposit Type:
NotProvided
Notes on Vent Field Description:
non-transform offset (NTO); OH1 (=OH-1) segment is just south of Oceanographer FZ; hydrothermal activity not discovered here as of Gracia et al. (2000); at 1900-m depth on eastern flank of median ridge observed extinct hydrothermal deposits with submersible Nautile in 1996 (Gracia et al. 1998)
Notes Relevant to Biology:
Year and How Discovered (if active, visual confirmation is listed first):
1996 submersible Nautile did not find active vents; 2000 or earlier plume only
Discovery References (text):
NEED CITATION.
Other References (text):
Gracia et al. (1998) Volcano-tectonic variability along segments of the Mid-Atlantic Ridge between Azores platform and Hayes fracture zone: evidence from submersible and high-resolution sidescan sonar data. Geological Society, London, Special Publications 148: 1-15, DOI: 10.1144/GSL.SP.1998.148.01.01
Gracia et al., Earth Planet. Sci. Lett. 177, 89-103, 2000, Non-transform offsets along the Mid-Atlantic Ridge south of the Azores (38°N–34°N): ultramafic exposures and hosting of hydrothermal vents, doi:10.1016/S0012-821X(00)00034-0.
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