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Analysis and modeling of hydrothermal plume data acquired from the 85°E segment of the Gakkel Ridge

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dc.contributor.author Stranne, Christian
dc.contributor.author Sohn, Robert A.
dc.contributor.author Liljebladh, Bengt
dc.contributor.author Nakamura, Ko-ichi
dc.date.accessioned 2010-09-02T13:01:27Z
dc.date.available 2010-12-30T09:26:47Z
dc.date.issued 2010-06-30
dc.identifier.citation Journal of Geophysical Research 115 (2010): C06028 en_US
dc.identifier.uri http://hdl.handle.net/1912/3894
dc.description Author Posting. © American Geophysical Union, 2010. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 115 (2010): C06028, doi:10.1029/2009JC005776. en_US
dc.description.abstract We use data from a CTD plume-mapping campaign conducted during the Arctic Gakkel Vents (AGAVE) expedition in 2007 to constrain the nature of hydrothermal processes on the Gakkel Ridge at 85°E. Thermal and redox potential (Eh) anomalies were detected in two discrete depth intervals: 2400–2800 m (Interval 1) and 3000–3800 m (Interval 2). The spatial and temporal patterns of the signals indicate that the Interval 1 anomalies were most likely generated by a single large, high-temperature (T > 100°C) vent field located on the fault terraces that form the NE axial valley wall. In contrast, the Interval 2 anomalies appear to have been generated by up to 7 spatially distinct vent fields associated with constructional volcanic features on the floor of the axial valley, many of which may be sites of diffuse, low-temperature (T < 10°C) discharge. Numerical simulations of turbulent plumes rising in a weakly stratified Arctic Ocean water column indicate that the high-temperature field on the axial valley wall has a thermal power of ∼1.8 GW, similar to the Trans-Atlantic Geotraverse and Rainbow fields in the Atlantic Ocean, whereas the sites on the axial valley floor have values ranging from 5 to 110 MW. en_US
dc.description.sponsorship Thiswork was funded by the NSF Office of Polar Programs, Tellus—The Centre of Earth Systems Science at theUniversity of Gothenburg, and the Woods Hole Oceanographic Institution. en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2009JC005776
dc.subject Hydrothermal plumes en_US
dc.subject Gakkel Ridge en_US
dc.subject Hydrothermal vents en_US
dc.title Analysis and modeling of hydrothermal plume data acquired from the 85°E segment of the Gakkel Ridge en_US
dc.type Article en_US
dc.identifier.doi 10.1029/2009JC005776


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