Provenance constraints on the Tremp Formation paleogeography (southern Pyrenees): Ebro Massif VS Pyrenees sources

D. Gómez-Gras, M. Roigé, V. Fondevilla, O. Oms, S. Boya, E. Remacha

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Abstract

© 2015 Elsevier Ltd. A detailed petrological study has been performed for the end-Cretaceous clastic deposits of the southern Pyrenees. Provenance results indicate that the Maastrichtian systems from both the Àger and the Vallcebre synclines show compositional features that mainly consist of a high proportion of single and polycrystalline quartz grains, feldspar and plutonic fragments. By contrast, the sandstone systems of the Tremp syncline exhibit minor contributions from igneous source areas and higher amounts of carbonatic components. These results reveal that the Tremp basin had a source area interpreted as situated to the North in the uplifting Pyrenees. The fact that this basin does not show a high plutonic source signal indicates that the Àger and the Vallcebre basins had been fed from a distinct source area located to the South, here interpreted as the Ebro Massif. Thus, the differences mentioned above might imply that the Montsec High acted as a barrier, avoiding a southern influence in the Tremp basin.
Original languageEnglish
Pages (from-to)414-427
JournalCretaceous Research
Volume57
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Foreland basin
  • Maastrichtian
  • Petrography
  • Provenance
  • Sediment routing
  • Southern Pyrenees
  • Tremp Formation

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