23-25 September 2013
GEOMAR East shore
Europe/Berlin timezone
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Quaternary mass-transport deposits on the north-eastern Alboran seamounts (SW Mediterranean Sea)

Presented by Prof. Belen ALONSO on 23 Sep 2013 from 17:15 to 19:15
Type: Poster presentation
Session: Poster session

Content

The Quaternary stratigraphic architecture of seamounts and surrounding deposits in the eastern Alboran Sea reveals at least 53 stacked MTDs in the Pollux Bank, Sabinar Bank (Sabinar Platform and Western Sabinar), Maimonides Ridge, and Adra Ridge. These MTDs are grouped into two types based on their size: small-scale MTDs (length < 5 km and thickness < 18 ms) and large-scale MTDs (length > 5 km and thickness > 18 ms). The study of these deposits has allowed us to define a close relationship between size (thickness-length) and source area gradients. The frequency of MTD events has varied between 40 kyr and 373 kyr throughout the Quaternary (1.8 Ma to present). Correlation between individual MTDs is difficult but could be done for at least one local MTD event between Sabinar Platform and Western Sabinar (Sabinar Bank); in addition, one regional MTD event has been recognized around all of the studied seamounts. These failure events could have been triggered by tectonically controlled seismicity at both regional and local scale.

Place

Location: GEOMAR East shore
Address: Wischhofstr. 1-3 / D-24148 Kiel
Room: Lithothek

Primary authors

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Co-authors

  • G. ERCILLA Instituto de Ciencias del Mar, CSIC, Barcelona, Spain
  • M. GARCIA CSIC-Universidad de Granada, Granada, Spain
  • J. T. VáZQUEZ Instituto Espanol de Oceanografía, Centro de Málaga, Spain
  • C. JUAN Instituto de Ciencias del Mar, CSIC, Barcelona, Spain
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