US-Turkey Cooperative Research: Post-Seismic Deformation for the 1999 IZMIT/DUZCE Turkey Earthquake Sequence

0001143 reilingerdescription:该奖项旨在支持麻省理工学院地球、大气和行星科学系地球资源实验室首席研究科学家Robert Reilinger博士、土耳其伊斯坦布尔理工大学地质学教授Aykut A. Barka博士和Gebza马尔马拉研究中心Semih Ergintav博士的合作。土耳其正在研究监测和分析1999年土耳其地震的震后变形。其他合作者包括加州大学伯克利分校地质与地球物理系的Roland Burgmann博士和法国图卢兹国家科学研究中心的Kurt Feigl博士。1999年伊兹米特地震（震级7.4）和杜兹切地震（震级7.1）导致北安那托利亚断层西部150公里段的地表连续断裂，右侧地表偏移达到5米。这项研究建立在早期对断层系统应变积累的研究（1988-1999）和最近对伊兹米特事件的同震和震后变形的研究基础上。目前正在进行的工作主要由土耳其合作伙伴支持，以确定Duzce地震同震断层滑动的细节，这对建模工作至关重要。对这些事件的长期应变和同震断层滑动的严格约束以及对震后运动早期阶段的详细监测为开发约束后滑动和粘弹性松弛模型所需的观测提供了重要机会。区分这些机制的可能贡献对大陆岩石圈流变学和断裂带局部流变学具有重要意义。研究结果将增强我们对该地区和类似构造区域（如圣安德烈亚斯断层）地震周期机制的理解。项目范围：本项目将支持由美国国家科学基金会地球科学部提供主要支持的重要合作研究。该奖项将支持美国科学家在土耳其期间的旅费、生活费和实地费用，并部分支持外国科学家访问麻省理工学院。后者参加麻省理工学院的实地研究和会议，预计将导致实地工作的改进，以及对所获得的结果和将要达成的结论的解释。该项目非常符合国际项目司鼓励在重大科学问题研究上进行互利合作的目标。本项目的资金由国际项目司和地球科学司提供。

0001143ReilingerDescription: This award is to support the collaboration of Dr. Robert Reilinger, Principal Research Scientist, Earth Resources Laboratory, Department of Earth, Atmospheric, and Planetary Sciences at Massachusetts Institute of Technology, Cambridge, Massachusetts, Dr. Aykut A. Barka, Professor of Geology at Istanbul Technical University, Istanbul, Turkey, and Dr. Semih Ergintav, the Marmara Research Center, Gebza, Turkey in research to monitor and analyze post-seismic deformation for the 1999 Turkey earthquakes. Other collaborators include Dr. Roland Burgmann, Department of Geology and Geophysics, University of California, Berkeley, California, and Dr. Kurt Feigl, Centre National de la Recherche Scientifique, Toulouse, France. The 1999 earthquakes in Izmit (M=7.4) and Duzce (M=7.1) resulted in continuous surface break along a 150-km segment of the western North Anatolian fault, with right-lateral surface offsets reaching 5 m. This research builds on earlier studies of strain accumulation along the fault system (1988-1999) and recent studies of co-seismic and post-seismic deformation for the Izmit event. Ongoing work supported primarily by the Turkish partners to define the details of the Duzce earthquake co-seismic fault slip will be critical to the modeling effort. The tight constraints on secular strain and co-seismic fault slip for these events and the detailed monitoring of the early phase of post-seismic motions provide an important opportunity to develop the observations needed to constrain models of after-slip and viscoelastic relaxation. Distinguishing the possible contributions of these mechanisms has implications for the rheology of the continental lithosphere and localized rheology in the fault zone. The results will enhance our understanding of the mechanics of earthquake cycle in this and similar tectonic regions (such as the San Andreas fault).Scope: This project will support important collaborative research for which the primary support is provided by NSF's Division of Earth Sciences. This award will support the travel, living expenses and field expenses for the US scientists while in Turkey and partial support for the foreign scientists while visiting MIT. The latters' participation in field research and meetings at MIT is expected to lead to improvement in the fieldwork and in the interpretation of the results obtained and the conclusions to be reached. The project fits well with the objective of the Division of International Programs for encouraging mutually beneficial collaboration on research of important scientific problems. Funding for this project is provided by the Division of International Programs and the Division of Earth Sciences.