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<title lang=en>Drainage network evolution and patterns of sedimentation in an experimental wedge</title>
<creator>Viaplana-Muzas, Marc</creator>
<creator>BABAULT, Julien</creator>
<creator>DOMINGUEZ, Stéphane</creator>
<creator>Van Den Driessche, Jean</creator>
<creator>Legrand, Xavier</creator>
<contributor>Department of Geology ; Universitat Autònoma de Barcelona [Barcelona] (UAB)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Rennes (GR) ; Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0040-1951</source>
<source>EISSN: 1879-3266</source>
<source>Tectonophysics</source>
<publisher>Elsevier</publisher>
<identifier>insu-01252482</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01252482</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01252482</source>
<source>Tectonophysics, Elsevier, 2015, 664, pp.109-124. 〈10.1016/j.tecto.2015.09.007〉</source>
<identifier>DOI : 10.1016/j.tecto.2015.09.007</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.tecto.2015.09.007</relation>
<language>en</language>
<subject lang=en>Experimental modeling</subject>
<subject lang=en>Accretionary wedge</subject>
<subject lang=en>Drainage network organization</subject>
<subject lang=en>River diversion</subject>
<subject lang=en>Sedimentation patterns</subject>
<subject lang=en>Source-to-sink</subject>
<subject>[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>In fold and thrust belts drainage organization and patterns of sedimentation depend conceptually on the ability or not for preexisting reaches to incise uplifting thrust sheets. In this study we investigate experimentally the dynamics of drainage network in a wedge submitted to shortening and erosion. It allows us to reproduce and to monitor the interactions between tectonics, erosion and sedimentation during the development of up to five successive thrust sheets. In the experiments channels adjust to uplift rate by both increasing their slope and narrowing their channels as it is observed in nature. The series of experiments shows that the proportion of persistent preexisting transverse channels increases with the ratio of rainfall over shortening rates. The experiments confirm the view that the competition between discharge and tectonic uplift controls along-strike variations in sediment flux in sedimentary basins by controlling the drainage organization. If the transverse channels draining a wedge are not diverted, a line-source dispersal system develops in front of the active structure. If channels are diverted in the backlimb of the frontal structure it results in point-sourced depositional systems separated by areas fed only by small channels developing in the front of the wedge. Fans accumulated in front of the active structures reveal two stages of sedimentation, one of progradation, while the frontal structure is active and a second one of valley backfilling and thrust sealing during internal deformation of the wedge. The experiments also suggest that spatial variations in rock uplift rate along a thrust front may be evidenced by minimum-discharge variations of persistent transverse channels.</description>
<date>2015</date>
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