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Daisan-Kume Knoll

Name Alias(es): 
off-Kume Island
Vent Sites: 
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Maximum or Single Reported Depth (mbsl): 
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Volcano Number (if applicable): 
Host Rock: 
Deposit Type: 
Notes on Vent Field Description: 
Gondou: western flank of the third Kume-Knoll (Daisan-Kume Knoll); the position and temperature for this listing are for Gondou, confirmed in 2016 by ROV Kaiko dive 721, but may have been confirmed in 2014: "Based on our AUV data, ROV dives were conducted in November 2014. Chimneys and mounds with hydrothermal venting were confirmed [Ishikawa et al., 2016]" (Minami and Ohara, 2017); “ANA” is located close to Daisan-Kume Knoll (26°17.4’N 126°28.3’E 1070 m) and characterized by max. 228.5°C fluid venting (Makabe et al. 2016); ROV Hyper Dolphin 3000 Dive #1761 in December 2014 suggested potential activity in the caldera of this knoll as well;
Year and How Discovered (if active, visual confirmation is listed first): 
2015 ROV Kaiko; 2014 ROV Hyper Dolphin 3000 Dive 1761 may have confirmed; 2014 AUV temperature anomaly
Discovery References (text): 
Minami, H., and Y. Ohara (2017), The Gondou hydrothermal field in the Ryukyu Arc: A huge hydrothermal system on the flank of a caldera volcano, Geochem. Geophys. Geosyst., 18, 3489–3516, doi:10.1002/2017GC006868.;
Kairei Cruise Report KR16-16 Cross-ministerial Strategic Innovation Promotion Program (SIP) Next-Generation Technology for Ocean Resources Exploration; Seeking and Hunting the Hydrothermal Activities in Southern Okinawa Trough; 18 November 2016, Naha – 5 December 2016, Kagoshima; Japan Agency for Marine-Earth Science & Technology (JAMSTEC), (accessed on: 2019/01/09);
Makabe, A, et al. (2016) Discovery of new hydrothermal vent fields in the mid- and southern-Okinawa Trough. In: Goldschmidt conference abstracts 2016: 1945.; (accessed on: 2019/04/17);
Other References (text): 
Ishikawa, N., Morozumi, H., and S. Shiokawa (2016), Discovery of several new seafloor hydrothermal deposits by the regional survey, such as Gondou Site, in central part of the Okinawa Trough, Japan, Abstract 1277 presented at 2016 Goldshmidt Conference, Yokohama, Japan, Geochemical Society, Washington, D. C.; (accessed on: 2019/02/13);
CRUISE REPORT, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), R/V Natsushima, Cruise NT14-22, Structural development of volcanic caldera in Kume-jima western offshore December 25-30, 2014, (accessed on: 2019/02/13;