Evolution of a Pliocene Fan-Delta: Links between the Sorbas and Carboneras Basins, Southeast Spain

  1. L. E. Frostick3 and
  2. R. J. Steel4
  1. A. E. Mather

Published Online: 16 APR 2009

DOI: 10.1002/9781444304053.ch15

Tectonic Controls and Signatures in Sedimentary Successions

Tectonic Controls and Signatures in Sedimentary Successions

How to Cite

Mather, A. E. (1994) Evolution of a Pliocene Fan-Delta: Links between the Sorbas and Carboneras Basins, Southeast Spain, in Tectonic Controls and Signatures in Sedimentary Successions (eds L. E. Frostick and R. J. Steel), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304053.ch15

Editor Information

  1. 3

    Reading, UK

  2. 4

    Bergen, Norway

Author Information

  1. Department of Earth Sciences, University of Liverpool, Brownlow St., PO Box 147, Liverpool L69 3BX, UK

  1. Department of Geographical Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK

Publication History

  1. Published Online: 16 APR 2009
  2. Published Print: 28 FEB 1994

ISBN Information

Print ISBN: 9780632037452

Online ISBN: 9781444304053

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Keywords:

  • evolution of Pliocene fan delta;
  • regional tectonics;
  • stratigraphy of study area;
  • Polopos Formation;
  • Polopos Formation - lower conglomerate unit;
  • Polopos Formation –Ibanez sandstone member

Summary

The connection between a partially enclosed, fluvially dominated, tectonically elevated sedimentary basin (Sorbas Basin) and a less elevated basin with marine connections (Carboneras Basin) is examined. The two basins are separated by faulted, and differentially uplifted, basement across which a connection was maintained throughout the basin evolution but which became increasingly restricted as a result of continued tectonism. In the Pliocene the connection between the two basins had been reduced to a shallow valley through which the fluvial system of the Sorbas basin exited, to form part of a small fan-delta complex in the northern part of the Carboneras Basin. This complex was also fed by a more proximal source area located in the uplifted basement of the Sierra Alhamilla. As a result of its proximity to the fan-delta complex, sediment from this latter source area reached the fan delta fairly rapidly and dominated its early history. Maximum sediment discharge from the more distant Sorbas Basin source area only occurred after progradation of the developing fluvial system in the Sorbas Basin enabled coarse clastics to be delivered to the fan-delta front. Maximum sediment supply from the larger, Sorbas-Basin-sourced portion of the fan-delta therefore dominated the later history of the fan-delta complex. Initially high sediment yield from the Sorbas Basin was able to keep pace with contemporaneous deformation between the two basins. With continued uplift and regression, however, incision of the fan-delta complex and overlying fluvial deposits ensued.