Neotectonic controls and stream piracy on the evolution of a river catchment: a case study in the Agua de la Peña River basin, Western Pampean Ranges, Argentina

作者: Laura P. Perucca , Karen Espejo , María Yanina Esper Angillieri , Martín Rothis , Flavia Tejada

DOI: 10.1007/S41513-018-0052-8

关键词:

摘要: espanolProposito La cuenca del rio Agua de Pena esta ubicada al noreste la provincia San Juan, y atraviesa este a oeste, toda porcion norte sierra Valle Fertil, en las Sierras Pampeanas Occidentales. El fuerte relieve Fertil se atribuye actividad neotectonica falla su fanco occidental con rumbo NO. proposito nuestro estudio es interpretar el control geologico sobre red drenaje basculamiento neotectonico misma debido estructura antes mencionada Alto, NE. Tambien ha identifcado un evento captura fuvial hidrografca dichas fallas. Metodologia En estudio, analiza infuencia tectonica evolucion modelizacion actual Pena, traves uso indices marcadores geomorfologicos. Los diversos parametros morfotectonicos obtenidos para permiten determinar deformacion lo largo perfl rio. analisis morfometrico regional basa construccion cuatro perfles topografcos swath fin identifcar diversas caracteristicas topografcas regionales anomalias. Para analizar senal respuesta geomorfologica transitoria fuvial, evaluado canal principal sus afuentes terminos longitudinales distribucion los knickpoints. Resultados Nuestros resultados muestran topografia local drenaje. Sobre base anterior, inferimos que paisaje encuentra estado transitorio derivado una combinacion entre diseno rejuvenecimiento relieve. Las son causadas principalmente por migracion divisoria cabecera reciente. Esto puede ser resultado ajuste tectonico fallas Alto desde Pleistoceno hasta actualidad. Concluimos Que reorganizacion lineas e inversion cuaternari podrian explicar inusual fuvial. EnglishPurpose The River basin is located to the northeast of province and crosses from east west, entire northern portion in Western Pampean Ranges. strong relief mountain range attributed neotectonic activity NW trending fault. purpose this study interpret geological on dynamic drainage organization relevant tilt due above-mentioned fault NE In addition, identify stream piracy faults river basin. Method We analyze infuence tectonics evolution shaping up present day basin, using geomorphic markers. Several morphotectonic parameters obtained for allow us determine inference tectonic deformation along profle. morphometric analysis relies four topographical profles several topographic features anomalies. examine main channel tributaries terms their longitudinal knickpoints distribution order explore signal transient response capture. Results Our results show neotectonics topography network. Based foregoing, we infer that landscape state derived combination between arrangement rejuvenation, so, are mainly caused by divide migration, network adjustments catchment capture neotectonism. It may result adjustment since Pleistocene until day. Conclusion conclude reorganization lines reversal could explain unusual pattern

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