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    Navigational infrastructure at the East Pacific Rise 9°50′N area following the 2005–2006 eruption : seafloor benchmarks and near-bottom multibeam surveys

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    2008GC002070.pdf (8.128Mb)
    Date
    2008-11-06
    Author
    Soule, Samuel A.  Concept link
    Ferrini, Vicki L.  Concept link
    Kinsey, James C.  Concept link
    Fornari, Daniel J.  Concept link
    Sellers, Cynthia J.  Concept link
    White, Scott M.  Concept link
    Von Damm, Karen L.  Concept link
    Carbotte, Suzanne M.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3281
    As published
    https://doi.org/10.1029/2008GC002070
    DOI
    10.1029/2008GC002070
    Keyword
     Mid-ocean ridge; Bathymetry; Navigation; Acoustic; Hydrothermal vent 
    Abstract
    Four seafloor benchmarks were deployed with ROV Jason2 at frequently visited areas along the northern East Pacific Rise (NEPR) ridge crest near 9°50′N, within the Ridge2000 EPR integrated study site (ISS) bull's eye. When used in concert with established deep-ocean acoustic positioning techniques, these benchmarks provide navigational infrastructure to facilitate the integration of near-bottom data at this site by allowing efficient and quantitative coregistration of data and observations collected on multiple dives and over multiple cruises. High-resolution, near-bottom multibeam bathymetric surveys also were conducted along and across the ridge crest to provide a morphological and geological context for the benchmark areas. We describe the navigation and data processing techniques used to constrain the benchmark positions and outline operational details to effectively use benchmarks at this and other deep-ocean sites where multidisciplinary time series studies are conducted. The well-constrained positions of the benchmarks provide a consistent geospatial framework that can be used to limit navigational uncertainties during seafloor sampling and mapping programs and enable accurate spatial coregistration and integration of observations. These data are important to test a range of multidisciplinary hypotheses that seek to link geological, chemical, and biological processes associated with crustal accretion and energy transfer from the mantle to the hydrosphere at mid-ocean ridges.
    Description
    Author Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry Geophysics Geosystems 9 (2008):Q11T04, doi:10.1029/2008GC002070.
    Collections
    • Geology and Geophysics (G&G)
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Geochemistry Geophysics Geosystems 9 (2008): Q11T04
     

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