Collaborative research: Uplift and faulting at the transition from subduction to collision - a field and modeling study of the Calabrian Arc

合作研究：从俯冲到碰撞过渡时的隆升和断层——卡拉布里亚弧的现场和建模研究

• 批准号: 0607588
• 负责人: Luc Lavier
• 金额: $ 29.12万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607588&HistoricalAwards=false
• 关键词: Collaborative; research; Uplift; faulting; transition

0607588LavierThe Mediterranean Sea is the location of a number of inactive or failing subduction systems. Confined between the slowly converging landmasses of Eurasia and Africa, the Mediterranean microplates and their subduction systems can move independently only for a limited time before a collision ensues and forces a reorganization of the system. Of the complex, retreating, stalling and foundering subduction zones of the Mediterranean, Calabria is one of the most intriguing. It continues to subduct oceanic lithosphere, yet convergence appears to have stalled and uplift appears to have accelerated in the Pleistocene. Modern uplift rates are some of the highest in the Adriatic subduction systems. This project will focus an array of modern analysis techniques (quaternary geochronology, geomorphology, sedimentology, structural geology, seismicity, thermochronology, and GPS geodesty) on this problem; first, by refining the observations of horizontal and vertical motions back through time and second, by linking these to geodynamic models of upper mantle, lithospheric and crustal deformation. The key will be to connect the surface observations to the underlying geodynamics.The Calabrian arc represents an outstanding example of subduction and continental platform collision leading to rapid uplift and deformation of the upper plate. Its small size makes it a tractable field laboratory in which to study processes important to all subduction zones, including analysis of the forces driving and resisting subduction and their manifestations on plate motion and surface uplift. The international PI team will integrate and extend the field observations and modeling necessary to (1) understand why Calabria is undergoing sustained rapid uplift, and (2) explore the implications for processes at depth. These surface and near-surface observations will be combined with analysis of the deeper structure provided by the previously funded CD CAT/SCAN passive seismic experiment. Understanding the puzzle of why Calabria is being uplifted and why it has slowed its horizontal motion has broad implications for the processes that drive and impede plate motions.

0607588lavierthe地中海是许多不活动或失败系统的位置。 地中海微板及其俯冲系统局限于欧亚大陆和非洲的缓慢融合的地质，只能在碰撞发生并迫使系统重组之前独立移动。 卡拉布里亚（Calabria）是地中海的复合物，撤退，失速和基础俯冲带是最吸引人的。 它继续进行俯冲岩石圈，但收敛似乎已经停滞不前，而隆起似乎已经在更新世上加速了。 现代提升率是亚得利亚俯冲系统中最高的。 该项目将集中一系列现代分析技术（第四纪地质学，地貌学，沉积学，结构地质学，地震性，热力学和GPS GEODESTY）；首先，通过完善对水平和垂直运动的观察，通过将这些观察到时间和第二，将这些观察到上地幔，岩石圈和地壳变形的地球动力学模型。 关键是将表面观测值连接到基础地球动力学。卡拉布里亚弧代表了俯冲和大陆平台碰撞的出色例子，从而导致上板的快速升高和变形。 它的尺寸很小，使其成为一个可进行的田间实验室，在其中研究对所有俯冲带重要的过程，包括分析驾驶力和抵抗俯冲的分析及其在板运动和表面上升上的表现。 国际PI团队将整合和扩展所需的现场观察和建模，以了解为什么Calabria正在经历持续的快速提升，（2）探索对深度过程的影响。 这些表面和近表面的观察将与对先前资助的CD CAT/SCAN被动地震实验提供的更深层结构的分析相结合。 了解为什么加拉布里亚（Calabria）被提升的原因以及为什么它减慢其水平运动对驱动和阻碍板块运动的过程具有广泛的影响。