RT Journal Article
T1 Correlation of sedimentary units from grain-size and mineralogic analyses as a tool for constraining trench interpretations in palaeoseismology
A1 Ezquerro Ruiz, Lope
A1 Liesa, Carlos L.
A1 Simón, José L.
A1 Luzón Aguado, Aránzazu
A1 Arlegui, Luis E.
A1 Lafuente, Paloma
AB In palaeoseismological trench studies, precise correlation of sedimentary units between fault blocks has an unquestionable value for accurately inferring the amounts of coseismic displacement and hence for assessing seismic hazard. A methodology based on laser analysis of particle size and mineralogic composition by X-ray diffraction is proposed in order to strengthen the correlation of sedimentary units in a trench excavated across the Concud Fault (central Iberian Chain, Spain). The surveyed sediments show sharp and multiple lateral facies changes, as well as inconsistent optically stimulated luminescence (OSL) ages. The results reinforce the correlation based on field inspection of lithologic and sedimentologic features. Moreover, they allow interpretation of rejuvenation of OSL ages of samples in the upthrown fault block, which has been attributed to partial erosion of sedimentary units, as evidenced by their smaller thickness and erosive boundaries. The correlated units are then used to estimate coseismic displacements for three palaeoseismic events.
PB Springer
SN 1437-3254
YR 2014
FD 2014-09
LK https://hdl.handle.net/20.500.14352/116655
UL https://hdl.handle.net/20.500.14352/116655
LA eng
NO Ezquerro, L., Liesa, C. L., Simón, J. L., Arlegui, L. E., Luzón, A., Lafuente, P. (2014). Correlation of sedimentary units from grain-size and mineralogic analyses as a tool for constraining trench interpretations in palaeoseismology International Journal of Earth Sciences, 103, 2327-2333.
NO Ministerio de Economía y Competitividad
NO Gobierno de Aragón
NO Ministerio de Economía y Competitividad
DS Docta Complutense
RD 6 abr 2025