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STRATI 2013 pp 841-846 | Cite as

Advances in the Stratigraphy and Geochemistry of the Organic-Rich Lower Jurassic Series of the Lusitanian Basin (Portugal)

  • Luís V. DuarteEmail author
  • Ricardo L. Silva
  • João G. Mendonça Filho
  • Ana C. Azerêdo
  • Maria Cristina Cabral
  • María J. Comas-Rengifo
  • Gil Correia
  • Rui Ferreira
  • Isabel M. Loureiro
  • Ricardo Paredes
  • Alcides Pereira
  • Nadi Poças Ribeiro
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

Here we present the main results of a study of the high-resolution stratigraphy of the Lower Jurassic organic-rich marine series in the Lusitanian Basin, Portugal. In this basin, the Lower Jurassic consists mainly of an alternating marl–limestone succession (upper Sinemurian–Toarcian), with some intervals enriched in organic matter (upper Sinemurian and Pliensbachian). These Lower Jurassic carbonate units correspond to the Coimbra, Água de Madeiros, Vale das Fontes, Lemede, and S. Gião/Cabo Carvoeiro formations. In the last few years, these units have been the subject of a multidisciplinary and integrated stratigraphic analysis, based on the study of a range of biotic and abiotic parameters. In our study, high-resolution analysis of these units in the main reference sections of the basin have allowed seven main themes to be developed, involving sedimentological and sequential analysis, ammonite biostratigraphy, macroinvertebrate palaeontology and palaeoecology, ostracod analysis, chemostratigraphy, organic and petrographic geochemistry, and gamma-ray analysis. Besides the novel results obtained in each scientific domain, the integration of all the collected data has improved our knowledge of not only the stratigraphy and sedimentary knowledge of the Lower Jurassic carbonates but also the hydrocarbon generation potential of the different Sinemurian and Pliensbachian units.

Keywords

Integrated stratigraphy Palaeoenvironment Hydrocarbon source rock Jurassic Portugal 

Notes

Acknowledgments

The project PTDC/CTE-GIX/098968/2008 – “High-resolution stratigraphy of the Lower Jurassic organic-rich marine series in the Lusitanian Basin (Portugal)” is supported by the Portuguese Foundation for Science and Technology.

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Luís V. Duarte
    • 1
    Email author
  • Ricardo L. Silva
    • 1
  • João G. Mendonça Filho
    • 2
  • Ana C. Azerêdo
    • 3
  • Maria Cristina Cabral
    • 3
  • María J. Comas-Rengifo
    • 4
  • Gil Correia
    • 1
  • Rui Ferreira
    • 1
  • Isabel M. Loureiro
    • 3
  • Ricardo Paredes
    • 1
    • 4
  • Alcides Pereira
    • 1
  • Nadi Poças Ribeiro
    • 1
  1. 1.Departamento de Ciências da Terra and IMAR-CMAUniversidade de CoimbraCoimbraPortugal
  2. 2.Laboratório de Palinofácies e Fácies OrgânicasUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
  3. 3.Departamento e Centro de Geologia, Faculdade de CiênciasUniversidade de LisboaLisbonPortugal
  4. 4.Departamento de Paleontología, Facultad de Ciencias GeológicasUniversity Complutense de MadridMadridEspaña

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