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Physical characteristics of the Endeavour Ridge hydrothermal plume during July 1988

Thomson, Richard E ; Delaney, John R ; Mcduff, Russell E ; Janecky, David R ; Mcclain, James S

Earth and Planetary Science Letters, 1992, Vol.111(1), pp.141-154 [Periódico revisado por pares]

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  • Título:
    Physical characteristics of the Endeavour Ridge hydrothermal plume during July 1988
  • Autor: Thomson, Richard E ; Delaney, John R ; Mcduff, Russell E ; Janecky, David R ; Mcclain, James S
  • Assuntos: Geology ; Physics
  • É parte de: Earth and Planetary Science Letters, 1992, Vol.111(1), pp.141-154
  • Descrição: We conducted CTD-transmissometer tows from 8 to 26 July, 1988 within 15 km of the central hydrothermal vent site ( ≈ 47°57′N, 129°06′W) on the Endeavour segment of Juan de Fuca Ridge. Anomalies of temperature, salinity and light attenuation reveal possible new vent sites 4 and 8 km northeast and 6 km south of the central vent site. As a result of widespread plume dispersion, background values of potential temperature, salinity and light attenuation below the 1900 m depth exceeded those for “pristine” ambient waters by 0.05°C, 0.05 psu and 0.03 m , respectively. Maximum plume anomalies relative to the background waters were of the order of 0.10°C, 0.010 psu and 0.10 m at core depths of 2000–2050 m. Heat and salt anomalies were detectable more than 5 km from the central vent site whereas light attenuation (particle) anomalies were confined to within 2.5 km of the vent site. Based on the background water property anomalies and moored...
  • Idioma: Inglês

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