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Hydrothermal plume mapping as a prospecting tool for seafloor sulfide deposits: a case study at the Zouyu-1 and Zouyu-2 hydrothermal fields in the southern Mid-Atlantic Ridge
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  • Personal Author:
  • Description:
    Seafloor hydrothermal polymetallic sulfide deposits are a new type of resource, with great potential economic value and good prospect development. This paper discusses turbidity, oxidation-reduction potential, and temperature anomalies of hydrothermal plumes from the Zouyu-1 and Zouyu-2 hydrothermal fields on the southern Mid-Atlantic Ridge. We use the known location of these vent fields and plume data collected in multiple years (2009, 2011, 2013) to demonstrate how real-time plume exploration can be used to locate active vent fields, and thus associated sulfide deposits. Turbidity anomalies can be detected 10 s of km from an active source, but the location precision is no better than a few kilometers because fine-grained particles are quasi-conservative over periods of many days. Temperature and oxidation-reduction potential anomalies provide location precision of a few hundred meters. Temperature anomalies are generally weak and difficult to reliably detect, except by chance encounters of a buoyant plume. Oxidation-reduction potential is highly sensitive (nmol concentrations of reduced hydrothermal chemicals) to discharges of all temperatures and responds immediately to a plume encounter. Real-time surveys using continuous tows of turbidity and oxidation-reduction potential sensors offer the most efficient and precise surface ship exploration presently possible.

  • Document Type:
    Journal Article
  • Funding:
    Grant No: NA10OAR4320148
  • Collection(s):
    Office of Oceanic and Atmospheric Research (OAR)
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      Geochemistry Geophysics Geosystems, 18(1), 75-92.
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      Tidal oscillations of venting temperature and chlorinity have been observed in the long-term time series data recorded by the Benthic and Resistivity Sensors (BARS) at the Grotto mound on the Juan de Fuca Ridge. In this study, we use a one-dimensiona...
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      2016
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      Deep-Sea Research Part Ii-Topical Studies in Oceanography, 132, 68-89.
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      We use multivariate output from a hydrodynamic model of the Gulf of Alaska (GOA) to explore the covariance among its physical state and air/sea fluxes. We attempt to summarize this coupled variability using a limited set of patterns, and examine thei...
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      2016
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      Deep-Sea Research Part Ii-Topical Studies in Oceanography, 132, 6-23.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      During 2011 and 2013, an integrated,ecosystem study was undertaken on the Southeast Alaska shelf and slope. As part of that study, a total of 8 moorings were deployed each year along the coast of Baranof and Chichagof Islands, in Cross Sound and at I...
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      Geochemistry Geophysics Geosystems, 17(2), 300-323.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Rock and fluid samples were collected from three hydrothermal chimneys at the Endeavour Segment, Juan de Fuca Ridge to evaluate linkages among mineralogy, fluid chemistry, and microbial community composition within the chimneys. Mossbauer, midinfrare...
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      Evidence of ocean acidification (OA) throughout the global ocean has galvanized some coastal communities to evaluate carbonate chemistry variations closer to home. An impediment to doing this effectively is that, often, only one carbonate system para...
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      Frequent gap winds, defined here as offshore-directed flow channeled through mountain gaps, have been observed near Kodiak Island in the Gulf of Alaska (GOA). Gap winds from the Iliamna Lake gap were investigated using QuikSCAT wind data. The influen...
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      Williams, N. L.; Juranek, L. W.; Johnson, K. S.; Feely, R. A.; Riser, S. C.; Talley, L. D.; Russell, J. L.; Sarmiento, J. L.; Wanninkhof, R.;
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      Frontiers in Microbiology, 7, 12.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
      Description:
      Thermophilic methanogens are common autotrophs at hydrothermal vents, but their growth constraints and dependence on H-2 syntrophy in situ are poorly understood. Between 2012 and 2015, methanogens and H2-producing heterotrophs were detected by growth...
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      Geophysical Research Letters, 43(6), 2765-2772.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      Journal of Climate, 29(15), 5609-5616.
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      JISAO (Joint Institute for the Study of the Atmosphere and Ocean)
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      There were extensive regions of Arctic temperature extremes in January and February 2016 that continued into April. For January, the Arctic-wide averaged temperature anomaly was 2.0 degrees C above the previous record of 3.0 degrees C based on four r...
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