Present-day Kinematics and Dynamics of the Eastern Mediterranean

东地中海的当今运动学和动力学

• 批准号: 0838488
• 负责人: Robert Reilinger
• 金额: $ 70.08万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-01 至 2013-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838488&HistoricalAwards=false
• 关键词: Present; day; Kinematics; Dynamics; Eastern

We are using continuous and survey-mode Global Positioning System (GPS) and other relevant geological and geophysical information to clarify the special and temporal character of active deformation, and the forces driving this deformation, in the E. Mediterranean/Caucasus/Middle East region where the African, Arabian, and Eurasian plates interact. We place special emphasis on understanding the relationship between active deformation and geologic structures, and interactions between mantle dynamics and crustal tectonics. Our previous studies now provide an accurate (≤1mm/yr) description of regional deformation that is helping to define the basic principles that control continental deformation in this zone of plate interaction. These regional deformation patterns provide the framework for the more detailed studies we are now pursuing, including, (1) characterizing deformation (strain accumulation) along the main faults that control the large majority of deformation in this region (i.e., plate and block boundaries), (2) constraining better deformation in the S.E. Aegean (Greece and Turkey) that is closely related to active subduction and associated earthquake and tsunami hazards along the Hellenic trench, (3) quantifying deformation around unstable, continental triple junctions, including the Karliova and Karaman-Maras triple junctions in E Turkey, 4) determining the spatial character of strain accumulation as a function of the time in the earthquake cycle along the North Anatolian Fault, 5) monitoring and modeling postseismic deformation associated with the 1999, Izmit/Duzce earthquake sequence, and 6) working with collaborating partners to develop and apply realistic, dynamic models for active deformation of the continental lithosphere. This project involves quantifying fault behavior (rates of strain accumulation and fault locking depths), and as such provides a physical basis for earthquake forecasting (estimates of earthquake repeat times, locations, and magnitudes) and hazard mitigation. We work closely with, and provide technology transfer (GPS, deformation modeling) to, academic and government scientific research institutions in Turkey, Greece, Armenia, Azerbaijan, Georgia, Russia, and Ukraine, including many international students who participate in all aspects of the research. The geodetic infrastructure we are developing in this region is being used to constrain GPS satellite orbits, thereby contributing to other GPS research studies (geodynamics, atmospheric water vapor, LIDAR, ionospheric studies).This work is co-funded by the Geophysics and Tectonics Programs and the Office of International Science and Engineering.

我们正在使用连续和勘测模式的全球定位系统（GPS）和其他相关的地质和地球物理信息来阐明非洲、阿拉伯和欧亚板块相互作用的东地中海/高加索/中东地区活动变形的特殊和时间特征，以及驱动这种变形的力量。 我们特别强调了解活动变形与地质结构之间的关系，以及地幔动力学与地壳构造之间的相互作用。我们之前的研究现在提供了区域变形的准确（±1毫米/年）描述，这有助于定义控制该板块相互作用区域大陆变形的基本原理。这些区域变形模式为我们现在正在进行的更详细的研究提供了框架，包括：(1) 描述沿着控制该区域大部分变形（即板块和块体边界）的主要断层的变形（应变积累）的特征，(2) 限制东南部更好的变形。爱琴海（希腊和土耳其）与希腊海沟沿线的主动俯冲以及相关的地震和海啸灾害密切相关，(3) 量化不稳定的大陆三重交界点周围的变形，包括土耳其东部的卡利奥瓦和卡拉曼-马拉斯三重交界点，4) 确定应变累积的空间特征作为地震周期沿线时间的函数 北安纳托利亚断层，5) 监测和模拟与 1999 年伊兹米特/迪兹杰地震序列相关的震后变形，以及 6) 与合作伙伴合作开发和应用大陆岩石圈活动变形的现实动态模型。该项目涉及量化断层行为（应变累积率和断层锁定深度），从而为地震预报（地震重复时间、位置和震级的估计）和减灾提供物理基础。 我们与土耳其、希腊、亚美尼亚、阿塞拜疆、格鲁吉亚、俄罗斯和乌克兰的学术和政府科研机构密切合作，并向其提供技术转让（GPS、变形建模），其中包括许多参与各方面研究的国际学生。 我们在该地区开发的大地测量基础设施正用于限制 GPS 卫星轨道，从而有助于其他 GPS 研究（地球动力学、大气水蒸气、激光雷达、电离层研究）。这项工作由地球物理和构造计划以及国际科学与工程办公室共同资助。