GPS measurements of present-day crustal deformation within the restraining bend of the Dead Sea fault system in Lebanon

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dc.contributor.author Karam, G.
dc.contributor.author Gomez, F.
dc.contributor.author Khawlie, M.
dc.contributor.author McClusky, S.
dc.contributor.author Reilinger, R.
dc.contributor.author Jaafar, R.
dc.contributor.author Tabet, C.
dc.contributor.author Khair, C.
dc.contributor.author Barazangi, M.
dc.date.accessioned 2018-01-29T10:55:24Z
dc.date.available 2018-01-29T10:55:24Z
dc.date.copyright 2005 en_US
dc.identifier.uri http://hdl.handle.net/10725/6990
dc.description.abstract Lebanon and southwestern Syria comprise a prominent, 200-km long restraining bend along the Dead Sea fault system (DSFS) - the continental transform boundary between the Arabian and Sinai plates. Within this "Lebanese Restraining Bend", the DSFS splays into several prominent, left-lateral strike-slip faults, in addition to uplift owing to regional transpression. Hence, upper crustal deformation resulting from the relative motion between the Arabian and Sinai plates is likely distributed among multiple geological structures. We present new Global Positioning System (GPS) measurements that help constrain relative plate motion along this portion of the plate boundary and explore strain partitioning of the plate motion within the restraining bend. Our GPS observations were collected during 5 survey campaigns in Lebanon spanning more than 3 1/2 years. The regional survey network consists of 14 survey sites, along with one continuous GPS station (LAUG in Jbail, Lebanon). Our measurements are processed along with other continuous stations in the region and stabilized using the global ITRF2000 reference frame core sites. For tectonic interpretation we rotate this solution into the Arabian, Nubian and Sinai fixed plate reference frames. Across the restraining bend, we constrain the 4 - 6 mm/yr of plate motion, with 1-sigma uncertainties typically less than 1 mm/yr. The plate motion is particularly well constrained between the continuous GPS stations in Jbail and Damascus (Syria). Within the uncertainties, GPS-based velocities compare well with Holocene-averaged estimates of slip along the Yammouneh and Serghaya faults. Furthermore, displacement gradients also suggest small, but measurable, horizontal shortening across the Mt. Lebanon range. We develop our kinematic model further by applying an elastic block model to assess the kinematics of the restraining bend and constrain geodetic locking depths. These results provide critical constraints for documenting and assessing the earthquake hazard in Lebanon and nearby regions of Syria. en_US
dc.language.iso en en_US
dc.title GPS measurements of present-day crustal deformation within the restraining bend of the Dead Sea fault system in Lebanon 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 Tectonic deformation (6924) en_US
dc.keywords 1240 Satellite geodesy: results (6929, 7215, 7230, 7240) en_US
dc.keywords 8002 Continental neotectonics (8107) en_US
dc.keywords 8111 Continental tectonics: strike-slip and transform en_US
dc.identifier.ctation Gomez, F., Karam, G., Khawlie, M., McClusky, S., Reilinger, R., Jaafar, R., ... & Barazangi, M. (2005, December). GPS measurements of present-day crustal deformation within the restraining bend of the Dead Sea fault system in Lebanon. In AGU Fall Meeting Abstracts. en_US
dc.author.email gkaram@lau.edu.lb en_US
dc.conference.date 2005 en_US
dc.conference.title American Geophysical Union, Fall Meeting 2005 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/2005AGUFM.T51C1351G en_US
dc.publication.date 2005 en_US
dc.author.affiliation Lebanese American University en_US

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