Dolomite-Rich Condensed Sections in Overbank Deposits of Turbidite Channels: The Eocene Hecho Group, South-Central Pyrenees, Spain

  1. Sadoon Morad,
  2. J. Marcelo Ketzer and
  3. Luiz F. De Ros
  1. R. Marfil1,
  2. H. Mansurbeg2,
  3. D. Garcia3,
  4. M.A. Caja4,
  5. E. Remacha5,
  6. S. Morad6,
  7. A. Amorosi7 and
  8. J.-P. Nystuen8

Published Online: 22 MAY 2013

DOI: 10.1002/9781118485347.ch9

Linking Diagenesis to Sequence Stratigraphy

Linking Diagenesis to Sequence Stratigraphy

How to Cite

Marfil, R., Mansurbeg, H., Garcia, D., Caja, M.A., Remacha, E., Morad, S., Amorosi, A. and Nystuen, J.-P. (2013) Dolomite-Rich Condensed Sections in Overbank Deposits of Turbidite Channels: The Eocene Hecho Group, South-Central Pyrenees, Spain, in Linking Diagenesis to Sequence Stratigraphy (eds S. Morad, J. M. Ketzer and L. F. De Ros), John Wiley & Sons, Inc., West Sussex, UK. doi: 10.1002/9781118485347.ch9

Author Information

  1. 1

    Departamento de Petrología y Geoquímica, Facultad de Geología, Universidad Complutense de Madrid, Spain Department of Petroleum Geosciences, Soran University, Soran, Kurdistan Region, Iraq

  2. 2

    Department of Earth Sciences, Uppsala University, Villavägen 16, SE 752 36, Uppsala, Sweden

  3. 3

    Department of Petroleum Geosciences, The Petroleum Institute, Abu Dhabi, P.O. Box 2533, Abu Dhabi, United Arab Emirates

  4. 4

    Centre SPIN, Ecole Nationale Supéieure des Mines de Saint Etienne and UMR CNRS 6524, 158 cours Fauriel, 42023 Saint-Etienne, France

  5. 5

    Departament de Geología, Universitat Autónoma de Barcelona, Spain

  6. 6

    Dipartimento di Scienze della Terra e Geologico-Ambientali, University of Bologna, via Zamboni, 67, 40127 Bologna, Italy

  7. 7

    Upstream E&P, Centro Tecnológico Repsol, Móstoles, Madrid, Spain

  8. 8

    Department of Geology, University of Oslo, P.O. Box 1047 Blindern, NO-0316 Oslo, Norway

Publication History

  1. Published Online: 22 MAY 2013
  2. Published Print: 11 JAN 2013

ISBN Information

Print ISBN: 9781118485392

Online ISBN: 9781118485347

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Keywords:

  • calcite;
  • condensation;
  • dolomite;
  • Eocene turbidite systems;
  • overbank deposits;
  • yellow beds (YB)

Summary

In the Eocene turbidite systems of the south-central Pyrenees, high-resolution correlations within the apparently monotonous successions of thin beds of the major channel-overbank deposits have been facilitated by the occurrence of decimetre-thick, yellowish beds of micritic limestones and marlstones, which thus serve as marker beds. These yellow beds (YB) occur after deposition of a sandy stage of growth at turbidite system scale but can be only recognized in the overbank deposits of major turbidite channel complexes. Whole-rock and fine-fraction X-ray diffraction (XRD) analysis indicate that most YB contain detrital clay and consistently high concentrations of Fe, Mn and P, which are ascribed to condensation-driven, redox elemental redistribution. The YB are also richer in dolomite and calcite than the adjacent claystones, what is attributed to colonization by cryptobacteria algae. Dolomite has a more radiogenic 87Sr/86Sr signature than ambient sea water, suggesting partial derivation of Sr from detrital aluminosilicates.