IAB, low-K andesite, dacite
PMS, polymetallic sulfides
Notes on Vent Field Description:
on Shichito-Iwojima Ridge; vent field (250 x 200 m) with small chimneys of polymetallic sulfide, barite and anhydrite in caldera (1500 m diam) of arc volcano, clear fluids, 230-311 C, high d13C, CO2 and CH4; Tsunogai et al. (1994):"first report of the dissolved gas composition of a deep-sea venting hydrothermal system originating from arc volcanism"; 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:
Mytilidae (Bathymodiolus septemdierum), Bythograeidae, Polynoidae, shrimps
Year and How Discovered (if active, visual confirmation is listed first):
1991 submersible Shinkai 2000
Discovery References (text):
[Kasuga and Kato (1992) Discovery of hydrothermal ore deposits in the crater of the Suiyo Seamount on the Izu-Ogasawara Arc. Proc. JAMSTEC Symp. Deep-Sea Res. 8: 249-256 (in Japanese with English Abstr.)]
[Nagaoka et al. (1992) Geology of Mokuyo Seamount, Doyo Seamount, and Suiyo Seamount in the Sitiyo Seamounts on the Ogasawara arc. Proc. JAMSTEC Symp. Deep-Sea Res. 8: 237-248 (In Japanese with English abstract)].
Other References (text):
Tsunogai et al., Peculiar features of Suiyo Seamount hydrothermal fluids, Izu-Bonin arc: differences from subaerial volcanism. Earth Planet. Sci. Lett., 126, 289-301, 1994
Marumo et al. (2008) Mineralogy and Isotope Geochemistry of Active Submarine Hydrothermal Field at Suiyo Seamount, Izu – Bonin Arc, West Pacific Ocean. Resource Geology 58: 220-248.