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First hydrothermal discoveries on the Australian-Antarctic Ridge: Discharge sites, plume chemistry, and vent organisms

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Cited 14 time in scopus
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dc.contributor.authorPark, Sung Hyun-
dc.contributor.authorKim, Min-Jung-
dc.contributor.authorRhee, Tae Siek-
dc.contributor.authorHahm, Doshick-
dc.contributor.authorJoseph A. Resing-
dc.contributor.authorWon, Yong-Jin-
dc.contributor.authorJohn E. Lupton-
dc.contributor.authorEdward T. Baker-
dc.description.abstractThe Australian-Antarctic Ridge (AAR) is one of the largest unexplored regions of the global mid-ocean ridge system. Here, we report a multiyear effort to locate and characterize hydrothermal activity on two first-order segments of the AAR: KR1 and KR2. To locate vent sites on each segment, we used pro- files collected by Miniature Autonomous Plume Recorders on rock corers during R/V Araon cruises in March and December of 2011. Optical and oxidation-reduction-potential anomalies indicate multiple active sites on both segments. Seven profiles on KR2 found 3 sites, each separated by 25 km. Forty profiles on KR1 identified 17 sites, some within a few kilometer of each other. The spatial density of hydrothermal activity along KR1 and KR2 (plume incidence of 0.34) is consistent with the global trend for a spreading rate of 70 mm/yr. The densest area of hydrothermal activity, named ‘‘Mujin,’’ occurred along the 20 km-long inflated section near the segment center of KR1. Continuous plume surveys conducted in January?February of 2013 on R/V Araon found CH4/3He (1 2 15 3 106) and CH4/Mn (0.01?0.5) ratios in the plume samples, consistent with a basaltic-hosted system and typical of ridges with intermediate spreading rates. Addition- ally, some of the plume samples exhibited slightly higher ratios of H /3He and Fe/Mn than others, suggesting that those plumes are supported by a younger hydrothermal system that may have experienced a recent eruption. The Mujin-field was populated by Kiwa crabs and seven-armed Paulasterias starfish previ- ously recorded on the East Scotia Ridge, raising the possibility of circum-Antarctic biogeographic connections of vent fauna.-
dc.titleFirst hydrothermal discoveries on the Australian-Antarctic Ridge: Discharge sites, plume chemistry, and vent organisms-
dc.title.alternative호주-남극 중앙해령 열수 최초 발견: 분출위치, 열수 화학과 열수 생물-
dc.identifier.bibliographicCitation이원경, et al. 2015. "First hydrothermal discoveries on the Australian-Antarctic Ridge: Discharge sites, plume chemistry, and vent organisms". <em>GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS</em>, 16(9): 3061-3075.-
dc.description.jcrRateJCR 2013:18.75-
dc.subject.keywordAustralian Antarctic Ridge-
dc.subject.keywordhydrothermal plume-
dc.subject.keywordvent organism-
Appears in Collections  
2012-2013, Investigation of tectonics, mantle characteristics and hydrothermal vent in Australian-Antarctic Ridges, Antarctica (12-13) / Park, Sung-Hyun; Hahm, Doshik
2014-2016, Evolution of West Antarctic Rift System (WARS): Study of Tectonic Activities and Volcanism Near The Adare Trough and Antarctic Mid-Ocean Ridges / Hong; Jong Kuk
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