Crustal Uplift and Shortening of the Southern Tibetan Plateau from Thermochronology and Structural Studies

从热年代学和构造研究看青藏高原南部的地壳隆升和缩短

• 批准号: 8721026
• 负责人: William S. Kidd
• 金额: $ 12.25万
• 依托单位: SUNY at Albany
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-15 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8721026&HistoricalAwards=false
• 关键词: Crustal; Uplift; Shortening; Southern; Tibetan

The Tibetan plateau and the Himalayas are perhaps the best known example of the effect of a large-scale continental collision. A detailed understanding of this continental collision zone is crucial to help understanding of the development of mature continental crust, since it is recognized that continental collision is the essential last step in this process. The aim of this project is to explore the mechanisms dominantly responsible for crustal thickening and consequent uplift in the formation of a collisional plateau such as Tibet. The work will involve study of rocks from the Gangdise, Nyaingentanglha, Damxung and nearby areas of the Tibetan plateau. Samples will be analyzed by 40Ar/39Ar geochronology, apatite fission track dating and U-Pb dating to provide data to constrain the timing and rates of uplift in southern Lhasa Terrane. This will be compared to strain data from detailed structural analysis to test several models for the evolution of the Tibetan plateau. This research will be conducted under the Earth Sciences Protocol between the NSF and the Chinese Academy of Sciences.

青藏高原和喜马拉雅山也许是最著名的 这是大规模大陆碰撞的一个例子。 一 对这一大陆碰撞带的详细了解对于 有助于了解成熟大陆地壳的发展， 因为人们认识到，大陆碰撞是最后一次 在这个过程中的一步。 该项目的目的是探索 主要负责地壳增厚的机制， 在碰撞高原的形成过程中随之而来的隆起， 西藏 这项工作将包括研究冈底斯的岩石， 西藏高原的娘音唐古拉、当雄及附近地区。 样品将进行40 Ar/39 Ar年代学、磷灰石裂变 径迹测年和U-Pb测年，以提供数据来限制时间 以及拉萨地体南部的隆升速率 这将是比较 从详细的结构分析中提取数据来测试几个模型 青藏高原的演变。 这项研究将是 根据NSF和美国国家科学基金会之间的地球科学协议进行 中国科学院