Radio-density signal of bigradational sequences adjacent to the Southern Channela tomographic approach to contourite deposits in the the Gulf of Cádiz

  1. A. Mena 1
  2. M. García 2
  3. G. Francés 1
  4. M. Pérez-Arlucea 1
  5. F.J. Hernández-Molina 3
  6. L.M. Fernández-Salas 3
  1. 1 Universidade de Vigo
    info

    Universidade de Vigo

    Vigo, España

    ROR https://ror.org/05rdf8595

  2. 2 Instituto Andaluz de Ciencias de la Tierra
    info

    Instituto Andaluz de Ciencias de la Tierra

    Granada, España

    ROR https://ror.org/00v0g9w49

  3. 3 Instituto Español de Oceanografía, Centro de Cádiz
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Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Ano de publicación: 2021

Título do exemplar: X Congreso Geológico de España

Número: 18

Páxinas: 762-765

Tipo: Artigo

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Outras publicacións en: Geotemas (Madrid)

Resumo

The tomographic study of three gravity cores obtained in a transect crossing different sedimentary environments through the Southern Channel of the Contourite Depositional System of the Gulf of Cádiz, allows correlating the radio-den- sity values of the sediment with its grain size and composition. In the studied cores an increase in radio-density is observed through the transect rom out of the channel towards the inner part, where the MOW (Mediterranean Outflow Water) velocity is more intense. Since the grain size is linked in this study area to the speed of the MOW and its erosive / depositional capa- city, the variations in radio-density, and therefore, in grain size, can be tentatively correlated with variations in the e MOW speed. In this way, at least three bigradational sequences typical of the contourites sequence model can be observed and could correspond to at least three major pulses of current intensification.

Fonte de datos: Dialnet