Present-day Kinematics and Dynamics of the Eastern Mediterranean and Caucasus

东地中海和高加索地区的当今运动学和动力学

• 批准号: 0337497
• 负责人: Robert Reilinger
• 金额: $ 63.91万
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-01-15 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0337497&HistoricalAwards=false
• 关键词: Present; day; Kinematics; Dynamics; Eastern

Present-day Kinematics and Dynamics of the Eastern Mediterranean and CaucasusWe are using continuous and survey-mode GPS and other relevant geological and geophysical information to clarify active deformation and the forces driving this deformation in the E. Mediterranean/Caucasus/Middle East zone where the African, Arabian, and Eurasian plates interact. 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 region. We have modeled regional deformation using a relatively small number of elastic plates and blocks that interact along their boundaries. These models provide constraints on the underlying forces driving deformation, and the mechanical behavior (i.e., rheology) of the lithospheric. The regional deformation patterns provide the framework for the more detailed studies we are now pursuing. This includes (1) characterizing deformation (strain accumulation) along a number of the major faults that control the large majority of deformation in this region (i.e., block boundaries), (2) constraining better deformation in the S.E. Aegean (Greece and Turkey) that has thus far alluded simple block-like descriptions and may be better characterized by distributed deformation, and (3) quantifying deformation around unstable, continental triple junctions. More specifically, this includes developing a clearer picture of the character of present-day strain accumulation on a number of segments of the North Anatolian, East Anatolian, and Greater Caucasus thrust faults, and the Hellenic subduction zone. For the North Anatolian fault we are determining the spatial character of strain accumulation as a function of the time in the earthquake. The new GPS measurements around the East Anatolian fault are helping to characterize present-day deformation around the Dead Sea fault - East Anatolian fault - Cyprus arc triple junction and the influence of Arabia plate interaction with Anatolia. For the Greater Caucasus thrust fault and the Hellenic subduction zone, we are constraining fault locking depths and evaluating the implications for continental dynamics and earthquake hazards. In summary, the GPS results are being integrated with new seismic, paleoseismic, neotectonic, geologic, and other relevant geophysical information to constrain kinematic and dynamic models for regional deformation and the earthquake cycle in this continental collision zone.

当今地中海东部和高加索斯的动力学和动力学使用连续和调查模式GP以及其他相关的地质和地球物理信息来阐明主动变形以及在非洲，阿拉伯，阿拉伯，阿拉伯，Eurasian以及Eulasian plate相互作用的地中海/高加索地区/中东地区的E. suditerranean/Cucucasus/Middle Euther中驱动这种变形的力。 我们以前的研究现在提供了对区域变形的准确（〜1mm/yr）描述，该描述有助于定义控制该区域中大陆变形的基本原理。我们使用沿其边界相互作用的弹性板和块对区域变形进行了建模。这些模型对驱动变形的潜在力以及岩石圈的机械行为（即流变学）提供了约束。区域变形模式为我们正在追求的更详细的研究提供了框架。这包括（1）表征沿许多主要断层的变形（应变积累），这些断层控制该区域中大部分变形（即块边界），（2）约束S.E.中更好的变形。到目前为止，Aeegean（希腊和土耳其）提到了简单的块状描述，并且可以更好地以分布式变形为特征，并且（3）量化围绕不稳定的大陆三重连接的变形。更具体地说，这包括在北安纳托利亚，东安纳托利亚人和更大的高加索推力断层以及希腊俯冲带上的许多细分市场以及希腊俯冲带上的许多细分市场上，更清楚地了解了当今应变的特征。对于北安纳托利亚断层，我们确定应变积累的空间特征是地震中时间的函数。东安纳托利亚断层周围的新GPS测量正在有助于表征死海断层周围的当今变形 - 东安纳托利亚断层 - 塞浦路斯弧三连接以及阿拉伯板块与安纳托利亚的影响。对于更大的高加索推力断层和希腊俯冲带，我们正在限制故障锁定深度，并评估对大陆动力学和地震危害的影响。总而言之，GPS的结果与新的地震，古震震，新原子，地质和其他相关的地球物理信息集成在一起，以限制该大陆碰撞区域的区域变形和地震周期的运动学和动态模型。