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Myojin Knoll

Name Alias(es): 
Kita Bayonnaise
North-Bayonnaise Knoll
MGDS_FeatureID lowest in hierarchy: 
Vent Sites: 
Maximum Temperature: 
Location on map: 
National Jurisdiction: 
Maximum or Single Reported Depth (mbsl): 
Minimum Depth (mbsl): 
Tectonic setting: 
Volcano Number (if applicable): 
Host Rock: 
IAB, low-K andesite, dacite, rhyolithe
Deposit Type: 
PMS, polymetallic sulfides in mineralized tuff
Notes on Vent Field Description: 
submarine volcano on Shichito-Iwojima Ridge; active hydrothermal vent on eastern caldera floor with vent chimneys up to 30m high, 278 deg C; large 400x400m polymetallic Kuroko-type sulfide deposit named "Sunrise Deposit"; Neptune Minerals Plc, 21 Feb. 2007, applications by Neptune Minerals Japan Kabushiki Kaisha: "Neptune's applications also cover the Myojin and Myojinsho Knolls, and the Suiyo and Kaikata Seamounts, all of which contain known SMS mineralisation."
Notes Relevant to Biology: 
NT 13-05 cruise report includes Bathymodiolin mussels, polynoid worms, and crabs on ROV Hyper-Dolphin #1493
Year and How Discovered (if active, visual confirmation is listed first): 
1996 submersible Shinkai 2000
Discovery References (text): 
[Iizasa, K., et al. 1997. Sulfide chimneys and massive sulfides at Myojin Knoll caldera, Izu-Ogasawara arc. JAMSTEC J. Deep Sea Res. 13, pp. 443–456 (in Japanese with English abstract)]
Iizasa, K et al. (1999) A Kuroko-type polymetallic sulfide deposit in a submarine silicic caldera. Science 283: 975-977.
Other References (text): 
[Iizasa, K et al (1997) Volcanic-hosted sulfide-barite deposit from the Kita-Bayonnaise submarine caldera, Izu-Ogasawara Arc, northwestern Pacific. Mar Georesour Geotechnol 15(1): 1-20]
Tsunogai, U et al (2000) Carbon isotopic distribution of methane in deep-sea hydrothermal plume, Myojin Knoll Caldera, Izu-Bonin arc: implications for microbial methane oxidation in the oceans and applications to heat flux estimation. Geochim. Cosmochim. Acta 64: 2439-2452.
Natsushima NT 13-05 cruise report (2013), accessed 20150423,