EAR-PF: Evaluating the forearc response to shallow subduction: a geo-/thermochronologic investigation of the world's type exhumed shallow subduction complex, southern California

EAR-PF：评估弧前对浅俯冲的响应：对南加州挖出的世界型浅俯冲复合体进行地质/热年代学调查

• 批准号: 1250070
• 负责人: Alan Chapman
• 金额: $ 8.5万
• 依托单位: Chapman Alan D
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1250070&HistoricalAwards=false
• 关键词: EAR; PF; Evaluating; forearc; response

Dr. Alan D. Chapman has been awarded an NSF Earth Sciences Postdoctoral Fellowship to carry out a research and education plan at Stanford University. This work aims to quantify crustal fluxes associated with shallow subduction by applying modern geo-/thermochronologic techniques (e.g., U-Pb geochronology, (U-Th)/He thermochronology, and fission track analysis) to the best recognized exposure of an ancient shallow subduction system on Earth, located in southern California. The resulting dataset will be used to address: 1) regional issues pertinent to the North American Cordillera, most notably the relative importance of subduction erosion versus trench-linked transform faulting during the Late Cretaceous to early Tertiary Laramide orogeny and 2) global questions centered on processes by which crustal materials are recycled during shallow subduction (e.g., tectonic erosion, delamination, underplating, and magmatism).The proposed research will directly engage faculty, postdocs, researchers, and students of active geo-/thermochronology and subduction zone tectonics groups at Stanford. The results of this investigation will provide new insights into subduction dynamics, addressing questions of global importance regarding the life cycle of shallow subduction and the mechanisms of mass transfer between the crust and mantle. This project will deliver a wide range of data that address fundamental questions posed by the Subduction Cycles and Deformation initiative of the GeoPRISMS Program, the most pertinent of which concerns the origin and evolution of the continental crust. The proposed education plan involves: 1) teaching a seminar on the topic of shallow subduction followed by a field course to Big Sur, California; 2) mentoring a high school intern through the Stanford High School Internship Program; and 3) maintaining an active outreach program through the GeoKids cooperative with the U.S. Geological Survey.

艾伦·D博士查普曼已被授予美国国家科学基金会地球科学博士后奖学金，在斯坦福大学开展研究和教育计划。 这项工作旨在通过应用现代地质/热年代学技术（例如，U-Pb地质年代学、（U-Th）/He热年代学和裂变径迹分析）对地球上一个位于南加州的古老浅俯冲系统的最佳识别暴露进行了研究。 由此产生的数据集将用于解决：1）与北美科迪勒拉山脉有关的区域问题，最值得注意的是晚白垩世至早第三纪Laramide造山带期间俯冲侵蚀与海沟相关转换断层的相对重要性，以及2）以浅俯冲期间地壳物质再循环过程为中心的全球问题（例如，这项研究将直接吸引斯坦福大学活跃地质/热年代学和俯冲带构造学小组的教师、博士后、研究人员和学生。 这项调查的结果将提供新的见解俯冲动力学，解决全球重要性的问题，浅俯冲的生命周期和地壳和地幔之间的质量转移机制。该项目将提供范围广泛的数据，以解决GeoPRISMS方案的俯冲周期和变形倡议提出的基本问题，其中最相关的问题涉及大陆地壳的起源和演变。 拟议的教育计划包括：1）讲授一个关于浅俯冲主题的研讨会，然后到加州的大苏尔进行实地培训; 2）通过斯坦福大学高中实习方案指导一名高中实习生; 3）通过与美国地质调查局合作的GeoKids保持积极的外联方案。