Collaborative Research: The suturing process: Insight from the India-Asia collision zone

合作研究：缝合过程：印度-亚洲碰撞区的见解

• 批准号: 1008760
• 负责人: Bradley Hacker
• 金额: $ 26.61万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1008760&HistoricalAwards=false
• 关键词: Collaborative; Research; suturing; process; Insight

The suturing of continental fragments following the subduction of intervening oceanic lithosphere is a fundamental process in lithospheric dynamics and the shaping and growth of Earth?s continents. However, our understanding of this fundamental process remains limited. Ancient sutures manifest themselves in regional structural, sedimentary, and petrologic patterns across thousands of kilometers, and record evidence of past plate dynamics. The suturing process itself results in drastic changes in plate dynamics, creates Earth?s largest mountain belts, and changes global climate dynamics by closing ocean basins and raising high topography. In terms of a fundamental and global tectonic process, suturing is on par with oceanic subduction and mid-ocean ridge formation, yet little more can be found in Earth-science textbooks than its definition and passing reference to the India?Asia collision. The primary aims of this project are to understand the geodynamic processes before, during, and after suturing, and how these processes impact continental physiography and are expressed in the geological record. To achieve this goal, the PIs propose to study the India?Asia collision zone (IACZ) in southern Tibet and the northern Himalaya. Techniques to be employed include structural geology, stratigraphy, geochronology, thermochronology, stable and radiogenic isotope geochemistry, igneous and metamorphic petrology, paleomagnetism, and numerical geodynamical modeling of the associated processes.

大洋岩石圈俯冲后大陆板块的解体是岩石圈动力学的基本过程，也是地球形成和生长的重要机制。大陆。然而，我们对这一基本过程的理解仍然有限。 古老的缝合线在数千公里的区域结构，沉积和岩石学模式中表现出来，并记录了过去板块动力学的证据。 地球自转过程本身导致了板块动力学的剧烈变化，创造了地球？它是世界上最大的山脉带，并通过关闭海洋盆地和升高高地形来改变全球气候动态。就一个基本的全球构造过程而言，板块运动与大洋俯冲和洋中脊形成是同等重要的，但在地球科学教科书中，除了它的定义和对印度的顺便提及之外，几乎找不到更多的东西。亚洲碰撞。该项目的主要目的是了解地球动力学过程之前，期间，和之后，以及这些过程如何影响大陆地貌和地质记录中表示。为了实现这一目标，PI建议研究印度？西藏南部和喜马拉雅北方的亚洲碰撞带。 所采用的技术包括构造地质学、地层学、地质年代学、热年代学、稳定和放射性同位素地球化学、火成岩和变质岩石学、古地磁学以及相关过程的数值地球动力学建模。