IDEAN   23403
INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Unidad Ejecutora - UE
artículos
Título:
Neotectonic evidence in the inner section of the MalargFold-and-Thrust Belt, Grande river valley, Mendoza, Argentina Evidencias de neotecnica en la Faja Plegada y Corrida de Malargue, valle del río Grande, Mendoza, Argentina
Autor/es:
BARBERO, IVÁN; BENITEZ, ANAHÍ; WINOCUR, DIEGO A.
Revista:
Boletin de la Sociedad Geologica Mexicana
Editorial:
Instituto de Geologi­a, Universidad Nacional Autonoma de Mexico
Referencias:
Año: 2021 vol. 73 p. 1 - 24
ISSN:
1405-3322
Resumen:
This work exposes some features of the landscape that enable us to determine neotectonic activity in the internal sector of the cordillera (35º30?S -70º15?W). Through field observations, there were recognized lacustrine deposits characterized by laminated sands, silts, and clays, which records the sedimentation in a paleolake during a stage of the Last Glacial Maximum. The frequency and distribution of >0.1 km2 mass movement deposits and their location close to the active structures allow us to identify an accumulation of landslides around them. Although many factors have favored these movements as lithology, steep slopes and pos-glacial relief, their position in the landscape suggest that seismic activity accelerated the development of large mass movements. Finally, it is proposed that tectonic activity has taken place during the Pleistocene-Holocene inclusive, with earthquakes of magnitude Ms =6, so that El Seguro fault could be an active fault at present.