Tectonometamorphic Evolution of the Greater Himalayan Sequence of Bhutan

不丹大喜马拉雅层序的构造变质演化

• 批准号: 9406253
• 负责人: Lincoln Hollister
• 金额: $ 7.78万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9406253&HistoricalAwards=false
• 关键词: Tectonometamorphic; Evolution; Greater; Himalayan; Sequence

9406253 Hollister It is widely recognized that in the development of many orogenic belts there was a phase of rapid exhumation of hot crystalline rocks, giving rise to nearly isothermal decompression at peak temperature and clockwise PTt paths. Several recent studies in the Himalayas have focused on phases in the development of the Himalayan orogen consisting of high temperature decompression. One of the continuing problems is identifying the heat source for forming the migmatites in the middle crust, and several conflicting models have been proposed. This research is to obtain well constrained metamorphic P-T data and interpretation of P-T-time-deformation paths in order to constrain models pertaining to the question of how migmatite can be formed in or tectonically transported into the middle crust. Results will help understand the common occurrence of rapid exhumation of hot crystalline rocks in the cores of many orogenic zones.

小行星9406253霍利斯特 人们普遍认为，在许多造山带的发展过程中，都有一个热结晶岩快速折返的阶段，在峰值温度下产生近等温减压和顺时针PTt轨迹。 最近在喜马拉雅山的几项研究集中在喜马拉雅造山带的发展阶段，包括高温减压。 中地壳混合岩形成的热源是一个长期存在的问题，目前已提出了几种相互矛盾的模式。 本项研究旨在获得良好约束的变质P-T数据和解释P-T-时间-变形路径，以约束与混合岩如何在中地壳中形成或构造搬运到中地壳中的问题有关的模型。 研究结果将有助于理解许多造山带核部热结晶岩快速折返的普遍现象。