CAREER: The Detrital Record of Focused Rock Uplift and Exhumation, Northeast Indian Himalaya

职业：印度喜马拉雅东北部集中岩石隆起和折返的碎屑记录

• 批准号: 0955309
• 负责人: Katharine Huntington
• 金额: $ 48.72万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-15 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0955309&HistoricalAwards=false
• 关键词: CAREER; Detrital; Record; Focused; Rock

This CAREER project integrates research and education to investigate Himalayan tectonics using bedrock cooling ages and the sedimentary record downstream of the Eastern Himalayan Syntaxis. At the margins of the India-Asia collision zone, Himalayan topography curves around the corners of the Indian plate defining great bends or syntaxes that represent roughly a third of the highest active mountain range on Earth. At the Eastern Syntaxis, rock exhumation has been extremely rapid and localized for at least the last 3 million years, contributing disproportionately to the sediment flux of the great Brahmaputra river system and Bengal Fan downstream. Determining when rapid exhumation initiated and how focused it has been through time are key to understanding this localization of deformation in Earth?s crust. However, constraints based on bedrock data are limited to the last few million years and do not extend south of the syntaxis, precisely where some structural models predict rapid exhumation. This project will document the regional exhumation pattern, relating cooling ages of bedrock and modern river sediments to the area?s structural evolution, and extend the exhumation record through time by targeting sediments shed from the mountains in the past 50 million years that are now preserved in basins of northeast India and the Bengal Fan. The results will represent a fundamental new step towards addressing two broad Earth Science questions: 1) Over what time and spatial scales do processes linking erosion and the structural evolution of mountain belts operate? and 2) How does variability in sediments reflect these processes?Research and education will be integrated through inquiry-based teaching, professional development for high school teachers, and outreach in primarily minority-serving schools. Active learning methodologies and web resources will engage university students in a series of courses grounded in educational research, which challenge participants to develop original research proposals pertaining to Himalayan tectonics. Targeting high-achieving high school students has been demonstrated as an effective means to improve participation of underrepresented minorities in science. To implement this strategy, the principal investigator will mentor and train 10 high school teachers to offer introductory Earth Science for college credit in socio-economically disadvantaged minority serving high schools. Research findings will be integrated into high school laboratory activities taught by undergraduate students, in total involving 40 undergraduates in outreach and 600 high school students over 5 years. The university courses mutually reinforce research and teaching, training students to formulate and communicate meaningful new research questions. By permanently raising the caliber of science offerings in minority-serving schools, this project will showcase how collaboration between K-12 and higher education can motivate a diverse population of students, promote college readiness, and encourage academic interest in the physical sciences.

该职业项目将研究和教育整合起来，以使用基岩冷却年龄和东部喜马拉雅语法下游的沉积记录来调查喜马拉雅构造学。在印度 - 亚洲碰撞区的边缘，喜马拉雅地形绕印度板的角落弯曲，定义了大弯曲或语法，大约是地球上最高活跃山脉的三分之一。在东部语法上，岩石发掘至少在过去的300万年中一直非常迅速且位置，这导致了大婆罗门河河系统和下游孟加拉风扇的沉积物通量不成比例。确定何时启动快速挖掘，以及随着时间的推移的关注是理解地球中变形的这种定位的关键。但是，基于基岩数据的约束仅限于最近几百万年，并且不会延伸到句法的南部，而某些结构模型则可以预测快速挖掘。该项目将记录区域挖掘模式，将基岩和现代河流沉积物的冷却年龄与该地区的结构发展相关，并通过针对过去5000万年从山脉中脱落的沉积物来扩展散布记录，这些沉积物现在保存在北印度盆地和孟加拉风扇。结果将代表解决两个广泛的地球科学问题的基本新步骤：1）在什么时间和空间尺度上进行连接侵蚀和山带的结构演变的过程？ 2）沉积物中的变异性如何反映这些过程？研究和教育将通过基于询问的教学，高中教师的专业发展以及主要是少数派服务学校的外展来整合。积极的学习方法和Web资源将吸引大学生参加以教育研究为基础的一系列课程，这些课程挑战参与者制定与喜马拉雅构造有关的原始研究建议。针对高成就的高中生已被证明是改善代表性不足少数群体科学的有效手段。为了实施这一策略，首席研究员将指导和培训10位高中教师，以在社会经济处于弱势群体中的高中少数民族中的大学信用提供地球科学入门科学。研究结果将纳入本科生教授的高中实验室活动中，共有40名本科生在外展活动中和5年的600名高中生。大学课程相互加强研究和教学，培训学生制定和传达有意义的新研究问题。通过永久提高少数派服务学校的科学产品的才能，该项目将展示K-12与高等教育之间的合作如何激发多样化的学生，促进大学准备并鼓励对体育科学的学术兴趣。