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Tarama Knoll

Vent Sites: 
Fox site
Swan site
Crane site
Maximum Temperature: 
Location on map: 
National Jurisdiction: 
Maximum or Single Reported Depth (mbsl): 
Minimum Depth (mbsl): 
Tectonic setting: 
Full Spreading Rate (mm/a): 
Volcano Number (if applicable): 
Host Rock: 
Deposit Type: 
Notes on Vent Field Description: 
position is given for Fox Site, described by Yamanaka et al. (2015): "knoll lies almost at the foot of the south fault scarp in the rift graben of the southern Okinawa Trough", "During the KT05-26 cruise... a methane anomaly was detected near the seafloor around the area and was considered to be of possible hydrothermal origin", "Weak shimmering of clear warm fluid (up to 23 C) was found on the southwestern slope near the summit at a depth of 1510-1540 m in an area covered with red-brown sediment", "observed dense turbid water (possibly hydrothermal plume water)", ROV HyperDolphin dives in 2009, 2010, 2011; Okino et al. (2015): AUV Urashima dives 182 and 183 in 2014, "Previous ROV survey reported a low temperature shimmering hosted by rhyolitic rocks at the top of the knoll and the extent of turbid seawater at the southern slope of the knoll that may indicate an existence of unknown high temperature hydrothermal vent site"; "Swan site is the second hydrothermal site on Tarama knoll" (Makabe et al. 2016); Crane SIte was "located about 1950 - 1990 m deep on the northern slope of Tarama Hill in the southern Okinawa Trough," on ROV KAIKO dive #669 in 2015 (Makabe et al. 2016, Chen et al. 2017);
Year and How Discovered (if active, visual confirmation is listed first): 
2009 ROV HyperDolphin
Discovery References (text): 
Yamanaka, T., et al. (2015) The Tarama Knoll: Geochemical and Biological Profiles of Hydrothermal Activity. pp. 497-504 in Ishibashi, J. et al. (eds) Subseafloor Biosphere Linked to Hydrothermal Systems. Springer Japan. doi:10.1007/978-4-431-54865-2_40.
Other References (text): 
Okino, K. et al. (2015) Preliminary report of AUV URASHIMA dives at Tarama and Irabu hydrothermal fields. Japan Geosience Union Meeting 2015, abstract SCG64-09.
Chen, C. et al. (2017) Unanticipated discovery of two rare gastropod molluscs from recently located hydrothermally influenced areas in the Okinawa Trough. PeerJ 5:e4121; DOI 10.7717/peerj.4121
Makabe, A, et al. (2016) Discovery of new hydrothermal vent fields in the mid- and southern-Okinawa Trough. In: Goldschmidt conference abstracts 2016: 1945.