Middle Triassic Carbonate Ramp Systems in the Catalan Basin, Northeast Spain: Facies, Systems Tracts, Sequences and Controls

  1. Maurice E. Tucker3,
  2. James Lee Wilson4,
  3. Paul D. Crevello5,
  4. J. Rick Sarg6 and
  5. J. Fred Read7
  1. F. Calvet1,
  2. M. E. Tucker2 and
  3. J. M. Henton2

Published Online: 15 APR 2009

DOI: 10.1002/9781444303834.ch4

Carbonate Platforms: Facies, Sequences and Evolution

Carbonate Platforms: Facies, Sequences and Evolution

How to Cite

Calvet, F., Tucker, M. E. and Henton, J. M. (1986) Middle Triassic Carbonate Ramp Systems in the Catalan Basin, Northeast Spain: Facies, Systems Tracts, Sequences and Controls, in Carbonate Platforms: Facies, Sequences and Evolution (eds M. E. Tucker, J. L. Wilson, P. D. Crevello, J. Rick Sarg and J. F. Read), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444303834.ch4

Editor Information

  1. 3

    Durham, UK

  2. 4

    New Braunfels, Texas, USA

  3. 5

    Littleton, Colorado, USA

  4. 6

    Midland, Texas, USA

  5. 7

    Blacksburg, Virginia, USA

Author Information

  1. 1

    Dept. G.P.P.G., F́acultat de Geologia, Universitat de Barcelona, Zona Universitaria de Pedralbes, 08028 Barcelona, Spain

  2. 2

    Department of Geological Sciences, University of Durham, Durham DH1 3LE, UK

Publication History

  1. Published Online: 15 APR 2009
  2. Published Print: 22 DEC 1986

ISBN Information

Print ISBN: 9780632027583

Online ISBN: 9781444303834

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Keywords:

  • Middle Triassic carbonate ramp systems in Catalan Basin, northeast Spain;
  • tectono-sedimentary domains;
  • the Lower Muschelkalk – Catalan Basin;
  • dolomites;
  • depositional sequence

Summary

The Triassic of the Catalan Basin, eastern Spain, is ‘Germanic’ in character, with Buntsandstein, Muschelkalk and Keuper Units, succeeded by the Norian Imon Formation. Carbonate platforms developed in the Lower Muschelkalk (Anisian) and Upper Muschelkalk (Ladinian) and in the Imon. The Muschelkalk platform carbonates, the subject of this paper, are separated by the Middle Muschelkalk evaporites and marls. These platforms were broadly of the carbonate ramp type, with the facies very persistent laterally in the older platform sequence, but much more varied in the younger platform. Small-scale shallowing-upward cycles of various types are a feature of many units in both the Lower and Upper Muschelkalk. The Lower Muschelkalk has prominent palaeokarst horizons and in the Upper Muschelkalk, mud mound-reef complexes are a feature of one stratigraphic domain. Many of the Muschelkalk carbonates are dolomitized, with several types of dolomite distinguishable.

The Mid-Triassic strata of the Catalan Basin can be divided into two depositional sequences, and the systems tracts philosophy can be applied. Depositional sequence 1 consists of the uppermost part of the Buntsandstein (a lowstand systems tract of lutites, carbonates and evaporites, stratigraphically equivalent to the Röt of the German and North Sea basins) and the Lower Muschelkalk. The latter can be divided into a transgressive systems tract (of onlapping shallowing-upward cycles) and a highstand systems tract of a broadly aggrading-regressive peritidal unit. Depositional sequence 2 consists of the Middle Muschelkalk (a lowstand systems tract of gypsum-anhydrite and marl) and the Upper Muschelkalk. The latter can be divided into a transgressive systems tract of onlapping oolites, lagoonal facies, outer ramp cycles, mud mound–reef complexes and stromatolitic grainstone shoals, succeeded by a highstand systems tract package of laminated ‘basinal’ dolomicrites to peritidal dolomites. The two depositional sequences are third-order cycles which can be interpreted largely in terms of crustal extension followed by regional subsidence. The carbonate platforms developed at times of tectonic quiescence in the Catalan Basin. The metre-scale shallowing-upward cycles (parasequences) may be the result of orbital forcing in the Milankovitch band (they are fourth- and fifth-order cycles).