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Pescadero Basin, Auka

MGDS_FeatureID lowest in hierarchy: 
Vent Sites: 
Maximum Temperature: 
Location on map: 
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Maximum or Single Reported Depth (mbsl): 
Minimum Depth (mbsl): 
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Full Spreading Rate (mm/a): 
Volcano Number (if applicable): 
Host Rock: 
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Notes on Vent Field Description: 
spreading segment north of Alarcon Rise; list of vent sites from Goffredi et al. (2017), plus Diane's Vent from E/V Nautilus Cruise NA091 in 2017; need to determine synonyms for Mermaid Castle sites noted in 2015; position and temperature is given for Z chimney depth 3664 m on ROV Doc Ricketts Dive 748 in 2015; P Vent (also known as: Gatito de la Fumarole): 23.9580, -108.8622, 3673 m; Diane's Vent: 23.9549, -108.8631, 3650 m; distance from P to Materhorn approximately 500 m; MBARI website, accessed 11 May 2015, "290 degrees Celsius clear hydrothermal vent fluid and mainly carbonate chimney samples", "unexpected discovery of high-temperature carbonate chimneys with distinctive animals communities in Pescadero Basin."; MBARI press release, 2 June 2015, "...Pescadero Basin vents are the deepest high-temperature hydrothermal vents ever observed in or around the Pacific Ocean. They are also the only vents in the Pacific known to emit superheated fluids rich in both carbonate minerals and hydrocarbons.", "The Pescadero Basin is only the second place in the world where carbonate chimneys (instead of ones made primarily of sulfides) have been found in the deep sea."; MBARI YouTube video, accessed 10 June 2015,; video from E/V Nautilus Cruise NA091 in 2017:;
Notes Relevant to Biology: 
MBARI website, accessed 11 May 2015, "thousands of Oasisia tubeworms (red plume with brown tube) and numerous purple scale worms"; see macrofaunal species list in Goffredi et al. (2017)
Year and How Discovered (if active, visual confirmation is listed first): 
2015 ROV Doc Ricketts; 1990 or earlier plume only
Discovery References (text): 
Goffredi, S., et al. (2017) Hydrothermal vent fields discovered in the southern Gulf of California clarify role of habitat in augmenting regional diversity. Proceedings Royal Soc. B 284, DOI:10.1098/rspb.2017.0817;
Paduan, J., et al. (2015) Seafloor Hydrothermal Activity in the Southern Gulf of California, AGU Fall Meeting abstract OS22C-03;
[Vorobyev, S. et al. (1990) Indication of hydrothermal activity in the Pescadero Basin, Californian Gulf. Doklady AN SSSR, 315, 470-474];