Tectonothermal Effects of Dynamic Compensation in the Himalayas

喜马拉雅山动态补偿的构造热效应

• 批准号: 9418062
• 负责人: Kip Hodges
• 金额: $ 19.5万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 1999-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418062&HistoricalAwards=false
• 关键词: Tectonothermal; Effects; Dynamic; Compensation; Himalayas

9418062 Hodges This project will conduct mapping and geochronological studies of the Annapurna Range in central Nepal, where the processes of coeval shortening and extension occur within a convergent plate boundary setting. The extensional and strike slip faults are thought to work along with erosion to compensate for the extreme topographic gradients that would be produced by crustal shortening alone. Previous work has shown that there are miultiple generations of shortening and extesional structures in the Annapurna Range. This project will provide a reliable map of these structures, and obtain precise ages and pressure/temperature histories of the movement episodes. The results will give a better understanding of the relationship between thermal and tectonic processes in dynamically compensated orogenic regions, and will be applicable to orogenic belts worldwide.

9418062霍奇斯该项目将对尼泊尔中部的安纳普尔纳山脉进行测绘和地质年代学研究，那里的同时代缩短和伸展过程发生在会聚的板块边界环境中。伸展和走滑断层被认为与侵蚀一起工作，以补偿仅由地壳缩短所产生的极端地形梯度。以前的工作表明，在安纳普尔纳山脉有多代的缩短和伸展结构。该项目将提供这些结构的可靠地图，并获得运动幕的准确年龄和压力/温度历史。这一结果将更好地理解动力补偿造山带的热作用与构造作用之间的关系，并将适用于世界各地的造山带。