Recent seismotectonic setting of the Marmara Sea Region (NW Turkey):Results from finite element model studies
Tectonic consequences of intersecting of the compressive stress regime dominating on the North Anatolian Fault with the extensional stress regime dominating in the Aegean Region, in the Sea of Marmara are modeled using a two-dimensional, plane-stress, finite element scheme. Intersection of the two stress regime and rupture of major fault segments in the Sea of Marmara are investigated by assigning westward motions to the Turkish plate and southward motion to the Aegean plate. A number of boundary conditions are used to match the known fault motions with tectonic models. The fault segments are modeled as weak zones which could fail by slip (strike-slip faulting) and/or separation (normal faulting). Three different numerical models used in this study were based on the three different tectonic models proposed in the literature by Le Pichon et al., 2001 a; Armijo et al., 2002; and Okay et al., 2000. Results obtained from the ~ numerical models showed that each of the three tectonic models sheds light on the faulting and earthquake mechanisms of the fault segments in Marmara Sea. However, the slip vectors obtained for the major fault segments in Marmara Sea by the numerical models based on the tectonic models of Le Pichon et al. (2001a), Armijo et al. (2002) and Okay et al. (2000) seems to be in agreement with the GPS slip vectors determined for the region by McClusky et al. (2000). It is also concluded that one shouldnt expect an earthquake with magnitude greater than 7.4 in the Marmara Sea region.
K.Ercin Kasapoglu Ebru Ozturk
Department of Geological Engineering,Faculty of Engineering,Hacettepe University,06800 Beytepe,Ankar General Directorate of Minereal Research and Exploration,Coordinatory of Marine Researches,06520Balg
国际会议
International Symposium and The 7th Asian Regional Conference of IAEG(国际工程地质与环境协会年会暨第七届亚洲工程地质会议)
成都
英文
408-416
2009-09-09（万方平台首次上网日期，不代表论文的发表时间）