Seismites from a well core of palustrine deposits as a tool for reconstructing the palaeoseismic history of a fault

Ezquerro, Lope; Moretti, Massimo; Liesa, Carlos L.; Luzón, Aránzazu; Simón, José Luis Múñoz de Baena y

doi:10.1016/j.tecto.2015.05.025

Cited by 54 publications

(32 citation statements)

References 89 publications

(97 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First, vertical facies changes due to authigenic sedimentary processes provide the reversed density gradient necessary for bed deformation by gravitational forces after seismic instability, while bed thickness can control the size of SSDS (Alfaro et al, 2010). Second, lateral facies changes strictly determine the areal extension of the overall seismic liquefaction effects, so the continuity of individual deformed beds is largely controlled by the own lateral continuity of sedimentary environments (e.g., Rodríguez-López et al, 2007;Alfaro et al, 2010;Moretti and van Loon, 2014;Ezquerro et al, 2015Ezquerro et al, , 2016.…”

Section: Facies Control On the Development Of Seismitesmentioning

confidence: 99%

“…Although alluvial-aeolian interacting deposits may not be as good as lacustrine ones for earthquake recording (e.g., Rodríguez-Pascua et al, 2000;Alfaro et al, 2010;Gibert et al, 2011;Moretti and van Loon, 2014;Ezquerro et al, 2015), they have provided valuable information for improving the knowledge on the tectonic activity of the northern Teruel Basin during Late Pliocene time. Our results show how continental sedimentary systems with high lateral variability in facies can only provide a discontinuous, and probably incomplete, paleoseismic record.…”

Section: Number Of Recorded Paleoearthquakes and Recurrence Intervalmentioning

confidence: 99%

“…Our results show how continental sedimentary systems with high lateral variability in facies can only provide a discontinuous, and probably incomplete, paleoseismic record. Therefore, the reconstructed event succession should be considered as a bare minimum, hence the concept of apparent recurrence period (in the sense of Ezquerro et al, 2015) should be applied. Pre-seismic stratigraphic architecture shows the limited lateral continuity of wet and damp interdune deposits, and hence the limited extension of the reversed density gradient system that ultimately controls the lateral continuity of the deformed bed.…”

Section: Number Of Recorded Paleoearthquakes and Recurrence Intervalmentioning

confidence: 99%

See 2 more Smart Citations

Facies control on seismites in an alluvial–aeolian system: The Pliocene dunefield of the Teruel half-graben basin (eastern Spain)

Liesa

Rodríguez‐López

Ezquerro

et al. 2016

Sedimentary Geology

View full text Add to dashboard Cite

The recognition of seismically induced soft-sediment deformation structures (SSDS) in sedimentary successions characterized by different facies, and hence by different rheology, is challenging. This is the case for high porosity and high permeability aeolian facies interbedded with muddy wet interdune deposits and alluvial conglomerates and sandstones. Several types of SSDS have been studied in two exposures of the Upper Pliocene (2.9-2.6 Ma) sediments of a fault-bounded intracontinental aeolian dune field in the Teruel Basin (Iberian Chain, eastern Spain). Among SSDS, load and fluid-escape structures, apart from several animal tracks, have been recognized. Those structures show an irregular distribution through the studied stratigraphic sections, being scarce in homogenous aeolian sands and frequent in water-related facies. A detailed study of the distribution and geometry of SSDS and their relationships with respect to the stratigraphic architecture and facies has allowed a critical discrimination of trigger mechanisms, i.e. biological or physical overloading vs. earthquakes. The seismically induced structures are concentrated into seven deformed beds, showing an uneven lateral distribution and geometry closely controlled by the hosting sedimentary facies and their rheology. These seismites resulted from liquefaction during moderate earthquakes (estimated magnitude from 5.0 to 6.8). The most probable seismogenic source was the Sierra del Pobo normal fault zone, located 2 km to the East. Results show how an appropriate recognition of sedimentary facies is crucial to understand the lateral variability of seismites in sedimentary environments characterized by sharp facies changes.

show abstract

Section: Facies Control On the Development Of Seismitesmentioning

confidence: 99%

Section: Number Of Recorded Paleoearthquakes and Recurrence Intervalmentioning

confidence: 99%

Section: Number Of Recorded Paleoearthquakes and Recurrence Intervalmentioning

confidence: 99%

See 1 more Smart Citation

Facies control on seismites in an alluvial–aeolian system: The Pliocene dunefield of the Teruel half-graben basin (eastern Spain)

Liesa

Rodríguez‐López

Ezquerro

et al. 2016

Sedimentary Geology

View full text Add to dashboard Cite

show abstract

“…Magnitudes estimated from different empirical correlation models range from M w = 6.4 to M w = 6.8, with coseismic displacement ranging from 0.35 to 2.02 m (Lafuente et al 2011). By applying the original equation by Hanks and Kanamori (1979), Ezquerro et al (2015) calculate an Mw range from 6.5 to 6.6.…”

Section: Geological and Structural Settingmentioning

confidence: 99%

“…Several paleoseismic studies in trenches along the Concud Fault have been conducted mainly by our team (Lafuente et al 2011(Lafuente et al , 2014Simón et al 2012Simón et al , 2015Ezquerro et al 2015), but also for other research groups (Gutiérrez et al 2008). These studies have characterized the paleoseismic history of the fault, which includes eleven paleo-events since ca.…”

Section: Geological and Structural Settingmentioning

confidence: 99%

Geophysical characterization of buried active faults: the Concud Fault (Iberian Chain, NE Spain)

Anchuela

Lafuente

Arlegui

et al. 2015

Int J Earth Sci (Geol Rundsch)

View full text Add to dashboard Cite

Soft‐sediment deformation structures in the Late Messinian Abu Madi Formation, onshore Nile Delta, Egypt: Triggers and tectonostratigraphic implications

et al. 2022

View full text Add to dashboard Cite

The Upper Messinian Abu Madi Formation of the Nile Delta constitutes sediments deposited during the final stage of the Messinian salinity crisis (MSC). Several levels of soft‐sediment deformation structures (SSDS) were observed in the transgressive heterolithic fluvial facies deposited adjacent to the deep‐seated faults. The most common deformation features include diapiric structures, intraformational lithoclastic breccia, small‐scale normal faults, slump folds, and liquefied beds. Such association of SSDS typically resembles those described elsewhere as generated by a complex interplay of gravity‐driven and seismically induced liquefaction processes. The pore pressure measurements revealed high pore fluid density ~ 9.1 ppg equivalent density values which reflect a mild pressure disequilibrium in Abu Madi sediments. Pressure disequilibration is observed all over the studied section of the Abu Madi Formation and is not only restricted to the fluvial channel sandstones deposited during rapid loading. Therefore, allogenic seismic activity has been proposed as the main trigger for pressure disequilibrium and the development of SSDS in the Abu Madi Formation. The heterolithic nature of the Abu Madi sediments as well as the scarcity of bioturbation provides the favourable conditions for the preservation of the seismically induced deformation. The lateral variation in thickness suggests deposition of the Abu Madi Formation during periods of active subsidence which promotes the generation of the SSDS. Late MSC tectonism likely controlled the evolution and sedimentary facies variability of the Abu Madi canyon‐infill system, and therefore the distribution of Abu Madi facies varies significantly over very short distances. Abu Madi SSDS follows the spatial distribution observed in other “lago‐mare” deposits (e.g., Foes Formation and SE Spain), characterized by spatial variability and vertical rhythmic alternation between deformed and non‐deformed layers. Accordingly, regional tectonic instability in the circum‐Mediterranean margins during the late stage of the MSC is proposed.

show abstract

Seismites from a well core of palustrine deposits as a tool for reconstructing the palaeoseismic history of a fault

Cited by 54 publications

References 89 publications

Facies control on seismites in an alluvial–aeolian system: The Pliocene dunefield of the Teruel half-graben basin (eastern Spain)

Facies control on seismites in an alluvial–aeolian system: The Pliocene dunefield of the Teruel half-graben basin (eastern Spain)

Geophysical characterization of buried active faults: the Concud Fault (Iberian Chain, NE Spain)

Soft‐sediment deformation structures in the Late Messinian Abu Madi Formation, onshore Nile Delta, Egypt: Triggers and tectonostratigraphic implications

Contact Info

Product

Resources

About