Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities
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 do...
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2012
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| Online Access: | http://hdl.handle.net/10725/6991 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://adsabs.harvard.edu/abs/2012AGUFM.G53A1124G |
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| _version_ | 1864513481351364608 |
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| author | Karam, G. |
| author2 | Abdallah, C. Jaafar, R. Gomez, F. |
| author2_role | author author author |
| author_facet | Karam, G. Abdallah, C. Jaafar, R. Gomez, F. |
| author_role | author |
| dc.creator.none.fl_str_mv | Karam, G. Abdallah, C. Jaafar, R. Gomez, F. |
| dc.date.none.fl_str_mv | 2012 2018-01-29T11:47:51Z 2018-01-29T11:47:51Z 2018-01-29 |
| dc.identifier.none.fl_str_mv | http://hdl.handle.net/10725/6991 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. http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://adsabs.harvard.edu/abs/2012AGUFM.G53A1124G |
| dc.language.none.fl_str_mv | en |
| dc.rights.*.fl_str_mv | info:eu-repo/semantics/openAccess |
| dc.title.none.fl_str_mv | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| dc.type.none.fl_str_mv | Conference Paper / Proceeding info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/conferenceObject |
| description | 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. |
| eu_rights_str_mv | openAccess |
| format | conferenceObject |
| id | LAURepo_7c461e586eb3cac98dcd0d82d1e07352 |
| identifier_str_mv | 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. |
| language_invalid_str_mv | en |
| network_acronym_str | LAURepo |
| network_name_str | Lebanese American University repository |
| oai_identifier_str | oai:laur.lau.edu.lb:10725/6991 |
| publishDate | 2012 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocitiesKaram, G.Abdallah, C.Jaafar, R.Gomez, F.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.N/A2018-01-29T11:47:51Z2018-01-29T11:47:51Z20122018-01-29Conference Paper / Proceedinginfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10725/6991Gomez, 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.http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.phphttp://adsabs.harvard.edu/abs/2012AGUFM.G53A1124Geninfo:eu-repo/semantics/openAccessoai:laur.lau.edu.lb:10725/69912021-03-19T10:43:07Z |
| spellingShingle | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities Karam, G. |
| status_str | publishedVersion |
| title | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| title_full | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| title_fullStr | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| title_full_unstemmed | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| title_short | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| title_sort | Present-day strain and rotation in the Lebanese restraining bend of the Dead Sea fault system based on analysis of GPS velocities |
| url | http://hdl.handle.net/10725/6991 http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php http://adsabs.harvard.edu/abs/2012AGUFM.G53A1124G |