International Research Workshop: Deep Intracontinental Subduction in the Pamir

国际研究研讨会：帕米尔高原陆内俯冲深部

• 批准号: 1008921
• 负责人: Barbara Carrapa
• 金额: $ 3.9万
• 依托单位: University of Wyoming
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2011-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1008921&HistoricalAwards=false
• 关键词: International; Research; Workshop; Deep; Intracontinental

This award provides funding for a workshop on the dynamics of intracontinental subduction in the Alai Valley-Pamir region of central Asia. A variey of different processes at depth are all called ?intracontinental subduction? in the literature. In the most commonly discussed form, continental lithosphere follows oceanic lithosphere into a subduction zone, and during continued convergence, slices of the continental crust are stacked one atop the others, as has occurred within the Alps or Himalaya. The PIs are particularly interested in a different and unconventional possibility, where continental lithosphere forms the entirety of a subducting slab that penetrates the asthenosphere, and hence challenges conventional understanding of subduction initiation and the importance of slab pull to tectonic dynamics. They are proposing a project which will test hypotheses related to this last case, focusing on the Pamir as a natural laboratory for examining these processes.The Alai Valley-Pamir system is one of the best locations on Earth to investigate deep intracontinental subduction. The diverse implications of the hypotheses to be tested necessitate a multidisciplinary effort to measure both the current deep structure and time evolution of deformation in and surrounding the Pamir. The design of such an experiment requires a concentrated, multidisciplinary effort, best accomplished by bringing scientists from several countries and several disciplines together. Holding a workshop is an essential step towards developing a coherent project that is properly integrated and leverages the efforts of others. Participants in the workshop will include geologists and geophysicists from the USA and partner countries (Tajikistan, Kyrgyzstan, China, Germany and Canada).The outcomes of the workshop will be: 1) a plan regarding how to coordinate various scientific efforts and how to ultimately integrate the various preliminary results so to better test the hypotheses; and 2) a plan for sharing resources such as instruments and personnel in order to make the project as efficient and as successful as possible.

该奖项为中亚阿莱河谷-帕米尔地区陆内俯冲动力学讲习班提供资金。各种不同的深部过程统称为？陆内俯冲？在文学作品中。在最常见的讨论形式中，大陆岩石圈跟随大洋岩石圈进入俯冲带，在持续汇聚期间，陆壳切片一个接一个地堆叠在另一个之上，就像在阿尔卑斯山或喜马拉雅山脉发生的那样。PI特别感兴趣的是一种不同的、非常规的可能性，即大陆岩石圈形成贯穿软流圈的俯冲板块的整体，因此挑战了对俯冲开始和板块拉动对构造动力学的重要性的传统理解。他们正在提出一个项目，将检验与最后一个案例相关的假设，重点是帕米尔高原作为检验这些过程的天然实验室。阿莱山谷-帕米尔高原系统是地球上研究陆内深部俯冲的最佳地点之一。有待检验的假设的不同含义需要多学科的努力来测量帕米尔高原及其周围目前的深层结构和变形的时间演变。这种实验的设计需要集中的、多学科的努力，最好是将几个国家和几个学科的科学家聚集在一起。举办讲习班是朝着制定一个协调一致的项目迈出的重要一步，该项目将适当整合，并利用其他各方的努力。研讨会的参加者将包括来自美国及其伙伴国家(塔吉克斯坦、吉尔吉斯斯坦、中国、德国和加拿大)的地质学家和地球物理学家。研讨会的成果将是：1)关于如何协调各种科学工作以及如何最终整合各种初步结果以更好地检验假说的计划；以及2)共享仪器和人员等资源的计划，以使项目尽可能有效和成功。