The Messinian Ebro River incision

Autor: Speranta-Maria Popescu, Jean-Loup Rubino, Romain Pellen, Jean-Pierre Suc, Marina Rabineau, Christian Blanpied, Christian Gorini, Carmine Silenziario, Daniel Aslanian, Estelle Leroux
Přispěvatelé: Laboratoire Géosciences Océan (LGO), Institut Français de Recherche pour l'Exploitation de la Mer - Brest (IFREMER Centre de Bretagne), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Unité de recherche Géosciences Marines (Ifremer) (GM), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), PaleoEnvironnements et PaleobioSphere (PEPS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Centre scientifique et Technique Jean Feger (CSTJF), TOTAL FINA ELF, This work was co-funded by a grant from the French government under the program 'Investissements d'Avenir' the 'Laboratoire d'Excellence' LabexMER (ANR-10-LABX-19), and ISBLUE (ANR-17-EURE-0015) and by a grant from the Regional Council of Brittany. It was further supported by CNRS and IFREMER, with additional support from the French Actions-Marges Program (JL Rubino & P. Unternehr) and the GRI Méditerranée (Groupement Recherche et Industrie TOTAL-UPMC)., The Data base was built thanks to the SIGEOF spanish site, to academic cruises from France including PROGRES, AM-MED-1 (Leg 1 and Leg2), SARDINIA, WESTMEDFLUX, SEEPGOL, VALSIS) and Spain. We wish to thank TOTAL and Schlumberger for giving access to the seismic data and well data used in this study. The biostratigraphic studies and re-evaluations were performed by biostratigraphers from TOTAL. The authors acknowledge the fruitful and constructive reviews by Antonio Pedrera, Agnes Maillard, Lluís Cabrera and Dennis Brown, as well as those from the editor Liviu Matenco that greatly improved the manuscript., ANR-10-LABX-0019,LabexMER,LabexMER Marine Excellence Research: a changing ocean(2010), ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017), Université de Bretagne Sud (UBS)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2019
Předmět:
010504 meteorology & atmospheric sciences
Drainage basin
02 engineering and technology
Structural basin
Messinian Salinity Crisis
Oceanography
01 natural sciences
Sedimentary depositional environment
Paleontology
NW Mediterranean Sea
Segmentation
Continental margin
0202 electrical engineering
electronic engineering
information engineering
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology
Sea level
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
0105 earth and related environmental sciences
[SDU.STU.TE]Sciences of the Universe [physics]/Earth Sciences/Tectonics
Global and Planetary Change
geography
geography.geographical_feature_category
Knickpoint
Continental shelf
020206 networking & telecommunications
NW Mediterranean
Incised-valley system
[SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy
Sedimentary rock
Ebro fluvial system
[SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology
Geology
Sea Segmentation
Zdroj: Global And Planetary Change (0921-8181) (Elsevier BV), 2019-10, Vol. 181, P. 102988 (15p.)
Global and Planetary Change
Global and Planetary Change, Elsevier, 2019, 181, pp.102988. ⟨10.1016/j.gloplacha.2019.102988⟩
ISSN: 0921-8181
DOI: 10.1016/j.gloplacha.2019.102988⟩
Popis: International audience; Morphological sills condition sedimentary, water and fauna exchanges between different domains. In particular, sills are crucial factors to consider during the Messinian Salinity Crisis (MSC) palaeogeographic evolution (5.97–5.33 Ma) of the NW Mediterranean area. Here we focus on the Ebro River and its up to now unexplained short Messinian onshore length (~100 km) compared to that of the Messinian Rhone River (~480 km) despite similar present-day drainage basins. Thanks to an extensive seismic and borehole dataset, we present a new interpretation of a complete 270 km long Messinian Ebro incised-valley system course underneath the present-day continental margin and bathyal basin and its related distal detrital deposits. These results favour a syn-MSC or pre-MSC opening of the (endorheic) Ebro Basin to the Mediterranean. We propose a mechanism of retrogressive erosional process, localized at structural knickpoints that shift seaward through time. This mechanism resulted in the development of the complete incised-valley system and the falling stage system tract (FSST) during the MSC sea level fall with negligible or even null retrogressive inland erosion beyond the Catalan Coastal Range. The shifting of erosion-deposition is controlled by the pre-Messinian stepwise morphology and segmentation in the Valencia, Menorca and Liguro-Provence Basins. By comparison, the Rhone system is simpler, characterized by the key role of a single knickpoint (at the shelf-break) and a steeper continental slope. Both cases highlight the relationship between kinematic, segmentation and their relative morphologies, base-level fall and erosional/depositional response particularly well expressed during the outstanding MSC associated with a huge relative sea-level drop that we measured down to -1100 m below present day sea-level.
Databáze: OpenAIRE
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