Collaborative Research: Implications of Active Tectonics in Morocco for the Kinematics and Dynamics of Africa-Eurasia Plate Interactions in the Western Mediterranean

合作研究：摩洛哥活动构造对西地中海非洲-欧亚板块相互作用的运动学和动力学的影响

• 批准号: 0408728
• 负责人: Robert Reilinger
• 金额: --
• 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: 2004-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0408728&HistoricalAwards=false
• 关键词: Collaborative; Research; Implications; Active; Tectonics

This project is using Global Positioning System (GPS) repeat observations, and Interferometric Synthetic Aperture Radar (InSAR) to monitor active deformation in Morocco associated with ongoing "collision" of the African plate with Iberia (Eurasia). Additionally, neotectonic and paleoseismic studies are helping better determine the relation between ongoing deformation, earthquake generation, and the development of geologic structures. Toward these ends, the investigators are upgrading three continuous GPS (CGPS) stations (Rabat, Tetouan, Ifrane) and establishing a new CGPS station near Agadir. These stations provide highly precise estimates of Africa (Nubia) plate motion as well as strong constraints on intraplate deformation, including anticipated shortening across the Atlas Mountains in central Morocco. In addition, the Moroccan CGPS network provides a framework for integrating survey-mode GPS observations that provide dense coverage to isolate individual, active structures. The relationship between interseismic deformation (as recorded by GPS and InSAR) and the earthquake cycle are being investigate with paleoseismic techniques. A major focus of our work is the Rif Mountains in northwestern Morocco that exhibit rapid SW motions relative to the African plate as a whole. GPS and InSAR measurements are better defining the special and temporal character of these anomalous motions. Using the improved deformation results, quantitative models to test extrusion models (crust being squeezed out of the collision zone) as well as models of crustal deformation associated with dynamic processes in the mantle (active subduction, lithospheric delamination) are being developed.

该项目正在使用全球定位系统（GPS）重复观察，而干涉合成孔径雷达（INSAR）来监视与摩洛哥与伊比利亚（欧亚大陆）持续的“碰撞”相关的摩洛哥的主动变形。 此外，新原校和古呼吸研究有助于更好地确定持续的变形，地震产生和地质结构的发展之间的关系。 在这些目的方面，研究人员正在升级三个连续的GPS（CGP）站（Rabat，Tetouan，Ifrane），并在Agadir附近建立了一个新的CGPS站。 这些站点提供了对非洲（NUBIA）板块运动的高度精确估计，以及对板内变形的强大限制，包括预期摩洛哥中部阿特拉斯山脉的缩短。 此外，摩洛哥CGPS网络提供了一个框架，用于集成调查模式GPS观测值，可提供密集的覆盖范围，以隔离单个主动结构。 经过大小写变形（如GPS和INSAR记录）与地震循环之间的关系正在使用古糖震动技术进行研究。 我们作品的主要重点是摩洛哥西北部的Rif山脉，相对于整个非洲板块表现出快速的SW运动。 GPS和INSAR测量更好地定义了这些异常运动的特殊和时间特征。 使用改进的变形结果，开发了测试挤出模型（地壳被挤出碰撞区域）的定量模型以及与地幔中动态过程相关的地壳变形模型（主动俯冲，岩石圈分层）。