RT Journal Article
T1 Estimation of the tectonic slip-rate from Quaternary lacustrine facies within the intraplate Albacete province (SE of Spain)
A1 Rodríguez Pascua, Miguel Angel
A1 Bischoff, James L.
A1 Garduño Monroy, V.H.
A1 Pérez López, Raúl
A1 Giner Robles, Jorge Luis
A1 Israde Alcántara, I.
A1 Calvo Sorando, José Pedro
A1 Williams, Ross W.
AB The Quaternary lacustrine basin of Cordovilla (CB) represents one of the most active tectonic areas of the Prebetic Zone (Albacete, SE of Spain). The Quaternary sedimentary deposits of this basin are mainly endoreic lacustrine carbonate and alluvial deposits, developed in a semi-arid climate (Pleistocene-present). The basin is a NW–SE-elongated graben bounded by a major right-lateral oblique-fault, the Pozohondo Fault. This fault trendsNW–SE, with an approximate trace of 55 km, and is composed of various segments which are identified by fault scarps. In order to establish the slip-rate of the most active segment of the Pozohondo Fault, called the Cordovilla segment, we carried out a detailed study of the affected Quaternary lacustrine deposits. We found that the lacustrine facies could be related to episodic moderate paleoearthquakes. The slip-rate is calculated to be 0.05 and 0.09 mm/yr, using radiometric dating for the vertical offsets of the lacustrine facies. A trenching study at the northern part of the Cordovilla segment revealed two events caused by paleoearthquakes, with the most recent expressed as an oblique-fault off-setting a poorly-developed soil. The magnitude of the last event was greater than 6, using various empirical relationships for the fault displacement and the surface-length rupture. We estimate episodic activity across the Cordovilla segment, to be characterized by moderate-sized paleoearthquakes (M6), which is in agreement with the tectonic context of an intraplate zone of the Iberian plate.
PB Elsevier
SN 0037-0738
YR 2009
FD 2009
LK https://hdl.handle.net/20.500.14352/52378
UL https://hdl.handle.net/20.500.14352/52378
LA eng
NO Ministerio de Ciencia e Innovación (MICINN)
DS Docta Complutense
RD 2 ago 2024