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Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities

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dc.contributor.author Karam, G.
dc.contributor.author Abdallah, C.
dc.contributor.author Jaafar, R.
dc.contributor.author Gomez, F.
dc.date.accessioned 2018-01-29T11:47:51Z
dc.date.available 2018-01-29T11:47:51Z
dc.date.copyright 2012 en_US
dc.identifier.uri http://hdl.handle.net/10725/6991
dc.description.abstract The Lebanese Restraining Bend (LRB) is a ~200-km-long bend in the central part of the Dead Sea Fault system (DSFS). As with other large restraining bends, this part of the transform is characterized by more complicated structure than other parts. Additionally, results from recent GPS studies have documented slower velocities north of the LRB than are observed along the southern DSFS to the south. In an effort to understand how strain is transferred through the LRB, this study analyzes improved GPS velocities within the central DSFS based on new data and additional stations. Despite relatively modest rates of seismicity, the Dead Sea Fault system (DSFS) has a historically documented record of producing large and devastating earthquakes. Hence, geodetic measurements of crustal deformation may provide key constraints on processes of strain accumulation that may not be evident in instrumentally recorded seismicity. Within the LRB, the transform splays into two prominent strike-slip faults: The through-going Yammouneh fault and the Serghaya fault. The latter appears to terminate in the Anti-Lebanon Mountains. Additionally, some oblique plate motion is accommodated by thrusting along the coast of Lebanon. This study used GPS observations from survey-mode GPS sites, as well as continuous GPS stations in the region. In total, 22 GPS survey sites have been measured in Lebanon between 2002 and 2010, along with GPS data from the adjacent area. Elastic models are used for initial assessment of fault slip rates. Incorporating two major strike-slip faults, as well as an offshore thrust fault, this modeling suggests left-lateral slip rates of 3.8 mm/yr and 1.1 mm/yr for the Yammouneh and Serghaya faults, respectively. The GPS survey network has sufficient density for analyzing velocity gradients in an effort to quantify tectonic strains and rotations. The velocity gradients suggest that differential rotations play a role in accommodating some plate motion. en_US
dc.language.iso en en_US
dc.title Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities en_US
dc.type Conference Paper / Proceeding en_US
dc.author.school SOE en_US
dc.author.idnumber 199590200 en_US
dc.author.department Civil Engineering en_US
dc.description.embargo N/A en_US
dc.keywords 1209 GEODESY AND GRAVITY / Tectonic deformation en_US
dc.keywords 1240 GEODESY AND GRAVITY / Satellite geodesy: results en_US
dc.keywords 8107 TECTONOPHYSICS / Continental neotectonics en_US
dc.keywords 8111 TECTONOPHYSICS / Continental tectonics: strike-slip and transform en_US
dc.identifier.ctation Gomez, F., Jaafar, R., Abdallah, C., & Karam, G. (2012, December). Present-Day Strain and Rotation in the Lebanese Restraining Bend of the Dead Sea Fault System Based on Analysis of GPS Velocities. In AGU Fall Meeting Abstracts. en_US
dc.author.email gkaram@lau.edu.lb en_US
dc.conference.date December 3, 2012
dc.conference.subtitle adaptation options to increase resilience
dc.conference.title Energy sector vulnerability to climate change en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://adsabs.harvard.edu/abs/2012AGUFM.G53A1124G en_US
dc.publication.date 2012 en_US
dc.author.affiliation Lebanese American University en_US


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