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Slip deformation along the Gyaring Co fault from InSAR and GPS

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Interferometric synthetic aperture radar (InSAR) can monitor large-scale small deformation. Because the Sentinel-1 satellite has a stable orbit control and the data coherence in Qinghai–Tibet Plateau is good, we utilize data from Sentinel-1 to analyze the slip deformation of the Gyaring Co fault (GCF) in the central Tibetan Plateau. Data are obtained from ascending and descending tracks covering the research area, and the deformation results are obtained by the stacking and analysis of time series. The results demonstrate that the GCF exhibit slow slip overall. An analysis of different sections indicates that the fault displays both right-lateral strike-slip and normal faulting behaviors, and the movement is particularly obvious in the middle section of the GCF. Furthermore, we investigate the contemporary slip rate of the GCF using GPS data and construct two velocity profiles perpendicular to the fault strike at the southeastern and northwestern ends of the fault. The southeastern profile shows ~4 mm/year of right-lateral strike-slip movement and a modest (<1 mm/year) amount of crustal thickening across the fault, while the northwestern profle shows much slower (~ 1 mm/year) right-lateral strike-slip motion and 0.5 mm/ year of crustal extension. The GPS results are consistent with the InSAR deformation map derived using Sentinel-1 A/B data from 2014 to 2017. Our results support the distributed crustal motion model in which most crustal deformation (shortening/ extension/strike-slip) occurs on various active faults in the central Tibetan Plateau rather than being concentrated on several fast-moving fault zones, e.g., the GCF-BCF. Finally, we analyze the distribution of historical earthquakes and the gravity and aeromagnetic felds. We speculate that a fault may exist north of Gyaring Co Lake that may be an extension of the fault north of Mujiu Co Lake.
Słowa kluczowe
Czasopismo
Rocznik
Strony
53--63
Opis fizyczny
Bibliogr. 44 poz.
Twórcy
  • The First Monitoring and Application Center, CEA, Tianjin 300180, China
autor
  • National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 10085, China
autor
  • National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 10085, China
autor
  • National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 10085, China
autor
  • National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing 10085, China
autor
  • School of Automation, China University of Geosciences, Wuhan 430074, China
Bibliografia
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Uwagi
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-44eebd96-e815-40fc-8de7-bf16c81ece69
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