The contourite drifts over the Ewing Terrace (NE Argentina,SW Atlantic)

• Graziella Bozzano ^[4] ; Roberto Violante ^[4] ; Marcelo Paterlini ^[4] ; F. Javier Hernández-Molina ^[1] ; Till Hanebuth ^[2] ; Tammo Huppertz ^[2] ; Michael Strasser ^[2] ; Sebastian Razik ^[2] ; Maria Julia Orgeira ^[3] ; Sebastian Krastel ^[5]
  1. [1] Universidade de Vigo

     Universidade de Vigo

     Vigo, España

     
  2. [2] University of Bremen

     University of Bremen

     Kreisfreie Stadt Bremen, Alemania

     
  3. [3] Universidad de Buenos Aires

     Universidad de Buenos Aires

     Argentina

     
  4. [4] SHN – Servicio de Hidrografía Naval
  5. [5] IFM-GEOMAR – Leibniz Institute of Marine Sciences

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• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 11, 2010 (Ejemplar dedicado a: Deep-Water Circulation: Processes & Products. International Congress. Baitona, Pontevedra, Spain. 16 & 17 June 2010), págs. 25-26
• Idioma: inglés
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• Resumen

  • Large contourite drifts have been recently found over the Ewing Terrace on the middle slope of the northeastern Argentina continental margin at water depths that range from 600 to 1190 m approximately. Sediment cores from two recent oceanographic cruises together with the information gathered from cores collected during the past 50 years allowed us to define the rough extension of the drifts. Magnetic susceptibility proved to be very useful proxy for contourite sandy facies identification in this region. We found increasing thickness of the contourite drifts at deeper water depths, probably as a response to the variations in intensity and location of the northward flowing Antarctic Intermediate Water that forms these deposits. We expect that further sedimentological analyses combined with seismic information will shed more light on these newly detected contourite drifts