The Thermal and Denudation History of Tertiary Metamorphic Rocks in the Ailao Shan-Red River Shear Zone, Yunnan, PRC

云南哀牢山-红河剪切带第三纪变质岩热剥蚀史

• 批准号: 9103324
• 负责人: Timothy Harrison
• 金额: $ 3.51万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-15 至 1992-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9103324&HistoricalAwards=false
• 关键词: Thermal; Denudation; History; Tertiary; Metamorphic

The continued convergence of India northward into Asia requires that intraplate shortening be taken up by crustal thickening along major thrusts and lateral extrusion of crustal blocks along strike-slip faults. Assessment of the relative contributions of these two mechanisms requires detailed measurement of vertical and horizontal motions on the major faults. The Ailao- Shan Red River fault in Yunnan, PRC is a Tertiary ductile strike- slip zone with up to 500km of left-lateral motion. This study will date the time of the end of left-lateral motion and start of the present regime of right-lateral and normal fault motion. It will also resolve the uplift rate during faulting by 40Ar/39Ar analysis of the exhumed fault rocks. The results of this study will significantly add to our understanding of the lithospheric response to crustal collision.

印度继续向北汇聚到亚洲 要求板内缩短被地壳吸收 沿着主要逆冲断层增厚和地壳侧向挤压 沿走滑断层的沿着块体。 对亲属的评估 这两个机制的贡献需要详细的测量 主要断层的垂直和水平运动 哀牢- 中国云南的陕红河断裂是一条第三纪韧性走滑断裂， 滑动带，左旋运动可达500公里。 本研究将 注明左侧运动结束和开始的时间 现今的右旋和正断层运动状态。 它将 利用~（40）Ar/~（39 挖掘出来的断层岩 这项研究的结果将 大大增加了我们对岩石圈反应的理解 到地壳碰撞