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STRATI 2013 pp 707-710 | Cite as

Sedimentary Provenance of Neogene Strata From the Southwestern Portuguese Coast (Sines Cape): Detrital Zircon U–Pb Geochronology

  • Luís AlbardeiroEmail author
  • M. F. Pereira
  • Cristina Gama
  • Martim Chichorro
  • Mandy Hofmann
  • Ulf Linnemann
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

In this preliminary study of provenance analysis, Neogene sandstones and conglomerates of the Alvalade Basin were sampled from sea cliffs in the vicinity of the Sines Cape (southwestern Portuguese coast). Detrital zircons were extracted by conventional methods of particle size separation including magnetism and heavy liquids. Detrital zircons were dated using the U–Pb method by laser ablation with inductively coupled plasma mass spectrometry (LA–ICP–MS). The U–Pb geochronology results indicate the following as potential sources for the samples: (1) Carboniferous greywackes of the Mira Formation (South Portuguese Zone) or the Upper Triassic sandstones of the Silves Formation (Alentejo Basin) for the zircons with pre-Permian ages; and (2) syenites from the Sines Massif for the zircons with Late Cretaceous ages. One sample includes a significant population of detrital zircons of Permian age whose source is unidentified as there are no source rocks of such age in the Alvalade Basin.

Keywords

Plio–Pleistocene Sandstones and conglomerates Provenance analysis Alvalade Basin 

Notes

Acknowledgments

This paper is a contribution to research projects: GONDWANA-PTDC/CTE-GIX/110426/2009 and GOLD- PTDC/GEO–GEO/2446/2012 (Portugal). L. Albardeiro acknowledges a FCT PhD grant SFRH/BD/72581/2010. It is a contribution to project PEst-OE/CTE/UI4073/2014.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Luís Albardeiro
    • 1
    Email author
  • M. F. Pereira
    • 2
  • Cristina Gama
    • 3
  • Martim Chichorro
    • 4
  • Mandy Hofmann
    • 5
  • Ulf Linnemann
    • 5
  1. 1.IDLUniversidade de ÉvoraÉvoraPortugal
  2. 2.IDLDepartamento de GeociênciasÉvoraPortugal
  3. 3.CGE, Departamento de GeociênciasECT-Universidade de ÉvoraÉvoraPortugal
  4. 4. CICEGe, Departamento de Ciências da Terra, Faculdade de Ciências e Tecnologia Universidade Nova de LisboaCaparicaPortugal
  5. 5.Senckenberg Naturhistorische Sammlungen DresdenDresdenGermany

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