GEMT: Collaborative Research: From grain to rock and back again: Elucidating the coordinated evolution of exhumation pathways, rock strength and topography in the Taiwanese orogen

GEMT：合作研究：从颗粒到岩石再返回：阐明台湾造山带折返路径、岩石强度和地形的协调演化

• 批准号: 2231170
• 负责人: Eric Kirby
• 金额: $ 26.55万
• 依托单位: University of North Carolina at Chapel Hill
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2231170&HistoricalAwards=false
• 关键词: GEMT; Collaborative; Research; grain; rock; GEMT; Collaborative; Research; grain; rock

Topography influences stress in the Earth’s crust and the pattern of deformation that arises during mountain building. Because the material properties of rocks near the surface of the Earth depend on their burial and exhumation history, in collisional mountain belts feedbacks may exist between the burial history of rocks in the subsurface, their strength at the surface, and topography. However, few field data exist to evaluate the strength of such feedbacks between surface and deep-Earth processes. This project will address this knowledge gap by quantifying the tectonic origin and geomorphic implications of variations in rock material properties across the Taiwan Central Range. In addition, this project will facilitate international collaboration between US and Taiwanese scientists through paired field expeditions and a student exchange program, leveraging new and existing research collaborations.To explore relationships among burial and exhumation history, rock strength, and topography, this project will collect and integrate a paired dataset of structural and geomorphic observations. Existing and new measurements of erosion rates and thermal and deformation history will constrain patterns in burial and exhumation. Field surveys of river corridors assisted by small unmanned aerial vehicles will facilitate characterization of how rock properties influence river incision and hillslope-channel coupling at high resolution (centimeter-scale) and large spatial extent (kilometer-scale). Repeat surveys will enable high-resolution analysis of river response to individual storms. Data from this project will serve as a baseline for quantifying landscape response to future extreme events and help to address hazards associated with landslides, floods, and sedimentation.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地形会影响地壳的压力以及在山区建筑期间产生的变形模式。由于地球表面附近的岩石的物质特性取决于它们的埋葬和挖掘历史，因此在碰撞山带中，可能存在反馈在地下的岩石埋葬历史之间，其表面强度和地形。但是，很少有现场数据可以评估表面和深地球过程之间此类反馈的强度。该项目将通过量化台湾中央范围内岩石材料特性变化的构造起源和地貌含义来解决这一知识差距。此外，该项目将通过配对的现场探险和学生交流计划，利用新的和现有的研究合作，促进美国和台湾科学家之间的国际合作。探索埋葬和灌输历史，摇滚力量和地形之间的关系，该项目将收集和集成结构和地球形成的配对数据集。现有的和新的测量侵蚀率以及热变形历史记录将限制埋葬和发掘中的模式。由小型无人机辅助的河流走廊进行的现场调查将有助于表征岩石性能如何影响河流切口和高分辨率（厘米级）和较大空间范围（千尺度）的河流切口和山坡通道耦合。重复调查将对河流对各个风暴的反应进行高分辨率分析。该项目的数据将作为量化对未来极端事件的景观响应的基准，并有助于解决与滑坡，地板和沉积相关的危害。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的审查标准通过评估来通过评估来获得支持的。