ESR 4 - Sediment flux across the south-Pyrenean foreland Basin
Foreland systems are regions where complex interactions and feedbacks occur between tectonic growth, subsidence and the surface processes of erosion, sediment transport and sedimentation. Sediment fluxes across foreland systems may undergo multiple shifts driven primarily by the cratonwards propagation of the orogenic wedge, and externally driven base-level changes. These factors impact on the dispersal of sediments towards the peripheral oceanic basins, and the temporary development of sills and sinks. The project aims to reconstruct the evolving paleogeography and the sediment transfer systems of the Central and Eastern south-Pyrenean foreland in response to the tectonic emplacement of the South-Pyrenean Central Units. It aims to address the timing of basin partitioning, evolution of sills and sinks, and resulting rearrangement of sediment fluxes and its impact in the stratigraphic architecture. Key magnetostratigraphic sections will be constructed in the Ripoll, Ager and Graus-Tremp Basins to refine the absolute age of sedimentary sequences. The results from magnetostratigraphy will be integrated with paleocurrent data from the studied sections and with earlier sediment provenance studies based on petrological analyses and detrital zircon geochronometry.
- integrated study will provide further paleogeographic constrains to a debated stage of the evolution of the SouthPyrenean Foreland
- establishing a high resolution magnetostratigraphy-based chronostratigraphic frame of the Paleocene to Middle Eocene of the Eastern and Central Pyrenees regions
- analysis of sediment provenance from published and newly acquired data
- construction of Paleogeographic maps of the Paleocene to Middle Eocene (1 week short visit to UNIGE)
- testing results with numerical modelling, constraining rates of uplift, erosion and sedimentation.
- Université de Rennes 1 (F. Guillocheau & C. Robin) Integration of the North Pyrenean foreland basin (1 month)
- TOTAL (C. Fillon) Integration of AFTA database on the Pyrenean reliefs (1 month)
- GFZ – Helmholtz Centre Potsdam (J. Braun) - Modeling landscape evolution during foreland basin partitioning (7 month)