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    Detection of an unusually large hydrothermal event plume above the slow-spreading Carlsberg Ridge : NW Indian Ocean

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    2006GL026048.pdf (883.0Kb)
    Date
    2006-05-31
    Author
    Murton, Bramley J.  Concept link
    Baker, Edward T.  Concept link
    Sands, Carla M.  Concept link
    German, Christopher R.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3326
    As published
    https://doi.org/10.1029/2006GL026048
    DOI
    10.1029/2006GL026048
    Abstract
    About 90% of Earth's volcanism occurs along the global mid-ocean ridge system. Here, sporadic volcanic and tectonic activity is thought to cause cataclysmic release of hydrothermal fluids, forming event plumes. Each plume often contains as much hydrothermal effluent and heat as chronic hydrothermal venting from a typical vent site discharges during a year. To date, only a few event plumes have been detected, and only above intermediate-rate spreading ridges in the Pacific. Here, we report the first evidence for an unusually large event plume that originated from the slow-spreading (3 cm/yr full-rate) Carlsberg Ridge in the NW Indian Ocean. At 70 km long, up to 4540 km3 in volume and with up to 24 × 1016 J of excess heat, this event plume was substantially larger than previous ones and demonstrates that dispersion of hydrothermal heat and biological products from slow spreading ridges may be more significant and effective than hitherto imagined.
    Description
    Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 33 (2006): L10608, doi:10.1029/2006GL026048.
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    • Geology and Geophysics (G&G)
    Suggested Citation
    Geophysical Research Letters 33 (2006): L10608
     
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