MODELAÇÃO CRONOLÓGICA DE SEQUÊNCIAS SEDIMENTARES DO ESTUÁRIO DA RIBEIRA DE BENSAFRIM COM RECURSO À ESTATÍSTICA BAYESIANA

Authors

  • Paulo J. Cesário Portela Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa
  • José Manuel Matos Martins Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa
  • António Manuel Monge Soares Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, Universidade de Lisboa
  • Ana Ramos-Pereira Centro de Estudos Geográficos, Instituto de Geografia e Ordenamento do Território, Universidade de Lisboa
  • João Araújo-Gomes Centro de Estudos Geográficos, Instituto de Geografia e Ordenamento do Território, Universidade de Lisboa
  • André Torres Centro de Estudos Geográficos, Instituto de Geografia e Ordenamento do Território, Universidade de Lisboa

DOI:

https://doi.org/10.18055/Finis16084

Abstract

AGE MODELLING OF SEDIMENTARY SEQUENCES USING A BAYESIAN APPROACH - THE BENSAFRIM ESTUARY SEDIMENTARY INFILLING SEQUENCE AS A CASE STUDY. The Bensafrim estuary, located in Southern Portugal (Algarve coast), was selected to assess the evolution of the fluvial-marine interaction  along the Portuguese coast during the last 5000 years. Sedimentary sequences were collected in this estuary and radiocarbon dated, providing the necessary chronological framework to establish a reliable palaeoenvironmental reconstruction. A Bayesian approach was employed in an attempt to overcome some difficulties related with the chronological data, which was performed using the OxCal calibration software which allows the incorporation of stratigraphic information and an outlier analysis of the dataset. The analysis allowed the identification of outliers and the assessment of a reliable deposition model for the sedimentary sequence, establishing a robust chronological framework for the last 5000 years in this region of the Portuguese coast. Also, this model associated with sedimentological characterization points to the presence of the tsunami event that followed the Lisbon earthquake of 1755.

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Published

2019-12-20

How to Cite

Cesário Portela, P. J., Matos Martins, J. M., Monge Soares, A. M., Ramos-Pereira, A., Araújo-Gomes, J., & Torres, A. (2019). MODELAÇÃO CRONOLÓGICA DE SEQUÊNCIAS SEDIMENTARES DO ESTUÁRIO DA RIBEIRA DE BENSAFRIM COM RECURSO À ESTATÍSTICA BAYESIANA. Finisterra, 54(112), 113–130. https://doi.org/10.18055/Finis16084

Issue

Vol. 54 No. 112 (2019)

Section

Articles

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