RT Journal Article
T1 Actividad neotectónica de la Falla de Alentejo-Plasencia en Extremadura (Macizo Hespérico)
T1 Neotectonic activity of the Alentejo-Plasencia fault in Extremadura (Hesperian Massif)
A1 Villamor, P.
A1 Capote, Ramón
A1 Tsige, Meaza
AB Signs of recent tectonic activity are found at the Extremadura sector of Alentejo-Plasencia fault. This fault was active during the alpine compressional period as a sinistraI strike-slip fault at the foreland of a collisional zone and presents some activity from the Miocene to the Quaternary. Upper «Raña» deposits of Early Villafranquian age, present an around-2-meter-vertical-displacement at the north border of Alburquerque granitic massif. Close to this point old fluvial terraces of unknown age are folded and faulted, and low terraces (3 m above present river course) are jointed. In the tertiary Cañaveral pull-apart basin , at the Alcantara reservoir border, the fault disrupts a Tagus river fluvial terrace, which lies 80 m above the river course and has a probable Middle Pleistocene age. All these observations imply a vertical displacement which could be related to a slip rate less than 0.007 mm/year. If this fault is compared with other active faults of the Hesperian Massif, such as the Braganga-Manteigas one, it becomes clear that Alentejo-Plasencia fault is less active. There are though paleoseismicity structures associated to the Alentejo-Plasencia fault, such as liquefaction feature
PB Sociedad Geológica de España
YR 1996
FD 1996
LK http://hdl.handle.net/10272/12417
UL http://hdl.handle.net/10272/12417
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026