Suiyo Seamount is a seamount (submarine volcano) off the eastern coast of Japan, directly south of Torishima and Sofugan volcano at the southern tip of the Izu Islands. The volcano is one of the Shichiyo Seamounts, a small group of submarine volcanoes named after different days of the week ("Suiyo" means "Wednesday" in Japanese).[1]
Suiyo consists of a basaltic to dacitic submarine caldera and lava dome, and rises about 1,400 m (4,590 ft) from its base on the sea floor to within 1,418 m (4,652 ft) of the surface. Suiyo has a prominent summit caldera, 1.5 km (0.9 mi) wide and 500 m (1,640 ft) deep.[1]
The volcano's excised (weathered) structure suggests that it is of older age then some of the other volcanoes in the group. Suiyo is covered by a thick sediment cap, a feature that collects over a long span of inactivity, and fault patterns and valleys have been observed on its flanks.[2]
Suiyo Seamount is associated with a magnetic anomaly: ocean-floor surveys of it and the surrounding area found that a large negative rock body existed to the east of the seamount, while positive bodies existed to the northwest and south. The reasons for this complex anomaly, which also exists in several other nearby seamounts, are unknown, but is suggested to be the result of interactions between different magnetic fields of different ages.[2]
A burst of hydrothermal activity was observed in July 1991, raising water temperatures at the vent to 290 °C (550 °F); following the event, the volcano, until then thought extinct, was reclassified as active by the Japan Meteorological Agency.[1] A bathymetric survey of the volcano found sulfur-oxidizing microbes to be predominant, and concluded that Suiyo Seamount was a natural "incubator" for this bacterial type.[3]
^ abMakoto Yuasa; Fumitoshi Murakami; Eiji Saito & Kazuaki Watanabe (1991). "Submarine topography of seamounts on the volcanic front of Izu–Ogasawara (Bonin) Arc" (PDF). Bulletin of the Geological Society of Japan. Geological Society of Japan. 42 (12): 703–743. Retrieved 10 October 2010.
^Michinari Sunamura; Yowsuke Higashi; Chiwaka Miyako; Jun-ichiro Ishibashi & Akihiko Maruyama (February 2004). "Two Bacteria Phylotypes Are Predominant in the Suiyo Seamount Hydrothermal Plume". Applied and Environmental Microbiology. American Society for Microbiology. 70 (2): 1190–1198. doi:10.1128/AEM.70.2.1190-1198.2004. PMC348851. PMID 14766605.
March 08, 2024
suiyo, seamount, seamount, submarine, volcano, eastern, coast, japan, directly, south, torishima, sofugan, volcano, southern, islands, volcano, shichiyo, seamounts, small, group, submarine, volcanoes, named, after, different, days, week, suiyo, means, wednesda. Suiyo Seamount is a seamount submarine volcano off the eastern coast of Japan directly south of Torishima and Sofugan volcano at the southern tip of the Izu Islands The volcano is one of the Shichiyo Seamounts a small group of submarine volcanoes named after different days of the week Suiyo means Wednesday in Japanese 1 Suiyo SeamountSummit depth1 418 m 4 652 ft 1 Height 1 400 m 4 593 ft 1 LocationRangeIzu Ogasawara TrenchCoordinates28 36 0 N 140 38 0 E 28 60000 N 140 63333 E 28 60000 140 63333 1 CountryIzu Islands JapanGeologyTypeSeamount submarine volcano Volcanic arc chainShichiyo SeamountsSuiyo consists of a basaltic to dacitic submarine caldera and lava dome and rises about 1 400 m 4 590 ft from its base on the sea floor to within 1 418 m 4 652 ft of the surface Suiyo has a prominent summit caldera 1 5 km 0 9 mi wide and 500 m 1 640 ft deep 1 The volcano s excised weathered structure suggests that it is of older age then some of the other volcanoes in the group Suiyo is covered by a thick sediment cap a feature that collects over a long span of inactivity and fault patterns and valleys have been observed on its flanks 2 Suiyo Seamount is associated with a magnetic anomaly ocean floor surveys of it and the surrounding area found that a large negative rock body existed to the east of the seamount while positive bodies existed to the northwest and south The reasons for this complex anomaly which also exists in several other nearby seamounts are unknown but is suggested to be the result of interactions between different magnetic fields of different ages 2 A burst of hydrothermal activity was observed in July 1991 raising water temperatures at the vent to 290 C 550 F following the event the volcano until then thought extinct was reclassified as active by the Japan Meteorological Agency 1 A bathymetric survey of the volcano found sulfur oxidizing microbes to be predominant and concluded that Suiyo Seamount was a natural incubator for this bacterial type 3 See also editList of volcanoes in JapanReferences edit a b c d e f Suiyo Seamount Global Volcanism Program Smithsonian Institution Retrieved 10 October 2010 a b Makoto Yuasa Fumitoshi Murakami Eiji Saito amp Kazuaki Watanabe 1991 Submarine topography of seamounts on the volcanic front of Izu Ogasawara Bonin Arc PDF Bulletin of the Geological Society of Japan Geological Society of Japan 42 12 703 743 Retrieved 10 October 2010 Michinari Sunamura Yowsuke Higashi Chiwaka Miyako Jun ichiro Ishibashi amp Akihiko Maruyama February 2004 Two Bacteria Phylotypes Are Predominant in the Suiyo Seamount Hydrothermal Plume Applied and Environmental Microbiology American Society for Microbiology 70 2 1190 1198 doi 10 1128 AEM 70 2 1190 1198 2004 PMC 348851 PMID 14766605 Retrieved from https en wikipedia org w index php title Suiyo Seamount amp oldid 1090201799, wikipedia, wiki, book, books, library,
