Sedimentary provenance of Neogene strata from the SW Portuguese Coast (Sines Cape): detrital zircon U-Pb geochronology

Research output: Chapter in Book/Report/Conference proceedingChapter

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
Original languageUnknown
Title of host publicationSTRATI 2013: First International Congress on Stratigraphy: At the Cutting Edge of Stratigraphy
EditorsR Rocha, J Pais, S Finney, JC Kullberg
Place of PublicationHeidelberg
PublisherSpringer International Publishing
Pages707-710
ISBN (Print)978-3-319-04363-0/978-3-319-04364-7
Publication statusPublished - 1 Jan 2014

Publication series

NameSpringer Geology
PublisherSpringer International Publishing

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