Tectono-Sedimentary Phases of the Latest Cretaceous and Cenozoic Compressive Evolution of the Algarve Margin (Southern Portugal)

  1. Gary Nichols,
  2. Ed Williams and
  3. Chris Paola
  1. Fernando C. Lopes1,2 and
  2. P. P. Cunha2

Published Online: 30 MAR 2009

DOI: 10.1002/9781444304411.ch6

Sedimentary Processes, Environments and Basins: A Tribute to Peter Friend

Sedimentary Processes, Environments and Basins: A Tribute to Peter Friend

How to Cite

Lopes, F. C. and Cunha, P. P. (2007) Tectono-Sedimentary Phases of the Latest Cretaceous and Cenozoic Compressive Evolution of the Algarve Margin (Southern Portugal), in Sedimentary Processes, Environments and Basins: A Tribute to Peter Friend (eds G. Nichols, E. Williams and C. Paola), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304411.ch6

Author Information

  1. 1

    Centro de Geofisica, Department of Earth Sciences, Faculty of Sciences and Technology, Universidade de Coimbra, Largo Marquês de Pombal, 3000-272 Coimbra, Portugal

  2. 2

    IMAR - Instituto de Mar, Department of Earth Sciences, Faculty of Sciences and Technology, Universidade de Coimbra, Av. Dr. Dias da Silva, 3000-134 Coimbra, Portugal

Publication History

  1. Published Online: 30 MAR 2009
  2. Published Print: 7 DEC 2007

Book Series:

  1. Special Publication Number 38 of the International Association of Sedimentologists

Book Series Editors:

  1. Ian Jarvis

Series Editor Information

  1. School of Earth Sciences & Geography, Centre for Earth & Environmental Science Research, Kingston University, Penrhyn Road, Kingston upon Thames KT1 2EE, UK

ISBN Information

Print ISBN: 9781405179225

Online ISBN: 9781444304411

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Keywords:

  • latest Cretaceous and Cenozoic tectono-sedimentary evolution of central and eastern Algarve margin;
  • differential motions between tectonic plates creating intense deformation along boundaries;
  • Azores–Gibraltar fracture zone (AGFZ);
  • cenozoic compressive evolution of Algarve margin;
  • tectono-sedimentary phases of Algarve margin;
  • Aquitanian to early Tortonian tectono-sedimentary phase;
  • tectono-sedimentary features of Algarve margin - geodynamic evolution of Gulf of Cadiz

Summary

The latest Cretaceous and Cenozoic tectono-sedimentary evolution of the central and eastern Algarve margin (southwestern Iberia) is reconstructed as a series of structural maps and three-dimensional diagrams based on multichannel seismic reflection data. Six seismic stratigraphic units, bounded by unconformities related to tectonic events during the African–Eurasian convergence, have been identified. Several episodes of major regional change in palaeogeography and tectonic setting are distinguished: they occurred in the Campanian, Lutetian, Oligocene–Aquitanian transition, middle Tortonian, Messinian–Zanclean transition and Zanclean–Piacenzian transition. These changes were induced by geodynamic events primarily related to the relative motions of the African and Eurasian plates. The Late Cretaceous and Cenozoic in the Algarve margin were dominated by compressional deformation. Triggered by the regional tectonics that affected the basement, Upper Triassic–Hettangian evaporites played an important role in tectono-sedimentary evolution by localizing both extensional and thrust detachments and generating both salt structures and salt-withdrawal sub-basins. During middle Eocene and Oligocene times, coeval development of compressive structures and normal fault systems in the eastern Algarve domain is interpreted as resulting from gravity gliding due to a general tilt of the margin. The increasing effects of the African–Eurasian convergent plate boundary zone resulted in the uplift of some areas, overprinted by an increasingly general subsidence of the domains studied.