| Titre | Geodetic constraints of the 2017 Mw7.3 Sarpol Zahab, Iran Earthquake, and its implications on the structure and mechanics of the northwest Zagros Thrust-Fold Belt |
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| Auteur | Feng, W ;
Samsonov, S; Almeida, R; Yassaghi, A; Li, J; Qiu, Q; Li, P;
Zheng, W |
| Source | Geophysical Research Letters vol. 45, issue 14, 2018 p. 6853-6861, https://doi.org/10.1029/2018GL078577  Accès ouvert |
| Année | 2018 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200438 |
| Éditeur | Wiley |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.1029/2018GL078577 |
| Media | papier; en ligne; numérique |
| Formats | pdf; html |
| Région | Sarpol-e Zahab; Zagros Mountains; Bamo Mount |
| Lat/Long OENS | 36.0000 62.0000 40.0000 24.0000 |
| Sujets | secousses séismiques; marges plaques; mouvements de la croûte; déformation; déplacement; géodésie; géodésie par satellite; méthodes radar; géologie du substratum rocheux; géologie du socle;
caractéristiques structurales; failles; modèles; soulèvement de la croûte; topographie; télédétection; satellites; Plaque Eurasienne; Système de positionnement global; géologie structurale; tectonique; géophysique; Sciences et technologie; Nature et
environnement |
| Illustrations | cartes géolscientiques généralisées; mécanismes au foyer; tableaux; profils; graphiques en étoile; coupes transversales |
| Diffusé | 2018 06 08 |
| Résumé | (disponible en anglais seulement)
We reveal transient surface deformation following the 2017 Mw7.3 Sarpol Zahab (Iran) earthquake using Interferometric Synthetic Aperture Radar (InSAR)
measurements. Based on the coseismic interferograms derived from the Advanced Land Observing Satellite-2 (ALOS-2) data, the preferred slip model of the earthquake has a centroid depth of 14.5 ± 4 km and suggests that a basement fault is most likely
responsible for the 2017 earthquake in the northwest Zagros fold-thrust belt zone. Two slip asperities with a maximum slip of 6 m separated by 16 km are observed in the best fitting slip model. The accumulated afterslip in the first month after the
mainshock determined from the Sentinel-1 postseismic interferograms reveals a slip distribution that lies immediately updip of the coseismic slip, implying that frictional properties of the fault vary along the rupture patch. The Bamo Mount in the
earthquake area was uplifted by approximately 1 m during the earthquake. We suggest that local topographic growth from both seismic and aseismic faulting behaviors is common within the Zagros fold-thrust belt zone based on our findings regarding the
2017 earthquake and other significant events in the region. |
| GEOSCAN ID | 327299 |
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