Exhumation of Ultrahigh-Pressure Rocks in the Dabie Mountains, Central China

华中大别山超高压岩石的折返

• 批准号: 9417958
• 负责人: Bradley Hacker
• 金额: $ 19.7万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-03-01 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417958&HistoricalAwards=false
• 关键词: Exhumation; Ultrahigh; Pressure; Rocks; Dabie

9417958 Liou This project will study the emplacement mechanisms of ultrahigh-pressure rocks that have been recently discovered in the Dabie Mountains in China. These eclogitic rocks contain minerals that indicate extremely deep burial, and the processes by which they were uplifted to the surface are unknown. The project will attempt to identify the strain history and deformation rates along major faults that bound the eclogitic rocks. Thermobarometry, metamorphic phase relations, and geochronology of the rocks within and on either side of the deformation zones will be used to assess the temperatures and pressures during deformation and the magnitude and timing of vertical displacement. This project will be the first study of the tectonic history of these ultrahigh-pressure rocks. The results will provide an understanding of the physical processes operative in the deepest levels of collisional orogens, and will illuminate the linkage among deep and shallow levels to tectonism.

小行星9417958 该项目将研究中国大别山最近发现的超高压岩石的侵位机制。 这些榴辉岩含有矿物，表明埋藏极深，它们被抬升到地表的过程是未知的。 该项目将试图确定沿沿着束缚榴辉岩的主要断层的应变历史和变形速率。 变形带内和两侧的岩石的热压测定法、变质相关系和地质年代学将用于评估变形期间的温度和压力以及垂直位移的幅度和时间。 该项目将是对这些超高压岩石构造历史的首次研究。 研究结果将有助于理解碰撞造山带最深层次的物理过程，并阐明深、浅层次与构造作用之间的联系。