Field evidence of Quaternary seismites in the Mostaganem-Relizane (western Algeria) region: seismotectonic implication
| Autor: | Nabila Guessoum, Azzeddine Benhamouche, Hamid Bourenane, Moustafa Abbouda, Youcef Bouhadad |
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| Rok vydání: | 2018 |
| Předmět: |
Water escape
010504 meteorology & atmospheric sciences Pillar Geochemistry Liquefaction Active fault 010502 geochemistry & geophysics 01 natural sciences Plate tectonics General Earth and Planetary Sciences Quaternary Geology 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Arabian Journal of Geosciences. 11 |
| ISSN: | 1866-7538 1866-7511 |
| DOI: | 10.1007/s12517-018-4009-1 |
| Popis: | Northwestern Algeria, Tell Atlas chain, belongs to the converging Africa-Eurasia plate boundary. Several active faults have been previously identified and several earthquakes occurred in the past. In the present study, seismites are observed in the Quaternary deposits. The identified seismites include injection sand dykes, pillar structures, pillow structures, load-cast structures, water escape structures, sismoslumps, thixotropic wedges, and thixotropic bowls. The following arguments support their seismic origin: (i) presence of active faults able of producing strong earthquakes, (ii) the granulometric characteristics of the deposits are favorable to liquefaction, (iii) the observed features, mainly those related to water escape structures, are comparable to those observed in modern earthquakes. Therefore, such features are evidence of the occurrence of earthquakes of M > 5.5 magnitude in this study area, which may occur in the future. |
| Databáze: | OpenAIRE |
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