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

印度继续向北汇聚到亚洲，需要通过沿主要逆冲带的地壳增厚和沿走滑断层的地壳块体侧向挤压来进行板内缩短。要评估这两种机制的相对贡献，需要详细测量主要断层上的垂直和水平运动。云南哀牢山红河断裂是一条左旋运动长达500公里的第三系韧性走滑带。这项研究将确定左旋运动结束的时间和当前右旋和正断层运动的开始时间。通过对出土的断层岩进行40Ar/39Ar分析，还可以解决断裂过程中的隆升速率问题。这项研究的结果将大大增加我们对岩石圈对地壳碰撞的响应的了解。

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.