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dc.contributor.author
Repasch, Marisa
dc.contributor.author
Scheingross, Joel S.
dc.contributor.author
Cook, Kristen L.
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Sachse, Dirk
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Dosch, Sophia
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Orfeo, Oscar
dc.contributor.author
Hovius, Niels
dc.date.available
2024-03-08T15:44:04Z
dc.date.issued
2023-10
dc.identifier.citation
Repasch, Marisa; Scheingross, Joel S.; Cook, Kristen L.; Sachse, Dirk; Dosch, Sophia; et al.; Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin; John Wiley & Sons; AGU Advances; 4; 5; 10-2023; 1-18
dc.identifier.issn
2576-604X
dc.identifier.uri
http://hdl.handle.net/11336/229881
dc.description.abstract
Tectonics exerts a strong control over the morphology of Earth´s surface that is apparent in active mountain belts. In lowland areas, subtle processes like lithospheric flexure and isostatic rebound can impact Earth surface dynamics, hydrologic connectivity, and topography, suggesting that geomorphic and hydrologic analyses can shed light on underlying lithospheric properties. Here we examine the effect of lithospheric flexure on the geomorphology, hydrology, and river water chemistry of the Rio Bermejo fluvial system in the east Andean foreland basin of northern Argentina. Results show that proximal to the mountain front, foredeep basin subsidence causes sedimentation along a braided channel belt that is superelevated relative to the surrounding flood basin. During floods, water flows from the superelevated channel into the groundwater reservoir, causing a net loss of discharge with distance downstream. Further downstream, forebulge uplift forces channel narrowing, high lateral migration rates, and incision up to 13 m into older river deposits. This incision locally allows groundwater flow into the river, causing a ∼20% increase in river solute load. Groundwater emerges from the forebulge into the backbulge, predominantly as spring-fed channels. Here, channel migration rates decrease, suggesting a switch from net uplift to subsidence that reduces the depth to the groundwater table. This analysis shows that subtle lithospheric flexure can have significant effects on river channel morphology that determine hydrologic flow paths, and ultimately influence geochemical and ecological patterns. We suggest that these effects may elucidate lithospheric properties that are otherwise inferred from bulk geophysical observations.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
AQUEOUS GEOCHEMISTRY
dc.subject
FORELAND BASINS
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GEOMORPHOLOGY
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HYDROGEOLOGY
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LITHOSPHERE DYNAMICS
dc.subject.classification
Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Lithospheric Flexure Controls on Geomorphology, Hydrology, and River Chemistry in the Andean Foreland Basin
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-02-02T15:07:43Z
dc.journal.volume
4
dc.journal.number
5
dc.journal.pagination
1-18
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Washington DC
dc.description.fil
Fil: Repasch, Marisa. State University of Colorado at Boulder; Estados Unidos
dc.description.fil
Fil: Scheingross, Joel S.. University of Nevada; Estados Unidos
dc.description.fil
Fil: Cook, Kristen L.. Universite Grenoble Alpes; Francia
dc.description.fil
Fil: Sachse, Dirk. German Research Centre for Geosciences; Alemania
dc.description.fil
Fil: Dosch, Sophia. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
dc.description.fil
Fil: Orfeo, Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina
dc.description.fil
Fil: Hovius, Niels. Universitat Potsdam; Alemania. German Research Centre for Geosciences; Alemania
dc.journal.title
AGU Advances
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2023AV000924
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