Tibetan Plateau Formation: tracing material flow around the East-Himalayan syntaxis

青藏高原形成：追踪东喜马拉雅构造结周围的物质流

• 批准号: 68871356
• 负责人: Professor Dr. Erwin Appel
• 金额: --
• 依托单位: Arbeitsgruppe Geophysik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/68871356?language=en
• 关键词: Tibetan; Plateau; Formation; tracing; material

Critical aspects such as the timing and nature of India-Asia collision and the initiation and evolution of the height and width of the Tibetan Plateau are disputed, untested, or unknown. It has been argued that Miocene to Recent geologic, geodetic, paleomagnetic, geomorphic, and geophysical features of the eastern Plateau are best explained by flow of low-viscosity material within the middle-lower crust; this model contrasts with the classic escape model that calls for large-scale displacement of lithospheric blocks toward SE-Asia. Both models have fundamental implications for crustal rheology, vertical coupling in the lithosphere, and Plateau formation and growth. Here, we test these fundamental models of continental lithosphere deformation by studying the geometry, timing, and magnitude of thermal and mechanical changes and material flow around the E-Himalayan syntaxis (SE-Tibet, W-Yunnan). This interdisciplinary project will integrate, in close cooperation with ITP colleagues, data from geology (structural geometry, kinematics, rheology, depth-temperature-time histories), paleomagne-tism (degree and distribution of crustal block rotation), and remote sensing/tectonic geomorphology (drainage development and river capture reflecting current deformation).

诸如印度-亚洲碰撞的时间和性质以及青藏高原高度和宽度的形成和演变等关键方面存在争议，未经检验或未知。有人认为，中新世到最近的地质，大地测量，古地磁，地貌和地球物理特征的东部高原是最好的解释低粘度物质的流动中，下地壳，这种模式与经典的逃逸模型，呼吁大规模位移的岩石圈块体向东南亚。这两个模型都对地壳流变学、岩石圈的垂直耦合以及高原的形成和生长具有重要意义。在这里，我们测试这些大陆岩石圈变形的基本模型，通过研究的几何形状，时间和大小的热和机械的变化和物质流周围的E喜马拉雅构造结（东南西藏，云南西部）。这一跨学科项目将与ITP同事密切合作，整合地质学（构造几何学、运动学、流变学、深度-温度-时间历史）、古地磁学（地壳块体旋转的程度和分布）和遥感/构造地貌学（反映当前变形的排水发展和河流捕获）的数据。

项目成果

Cenozoic clockwise rotation of the Tengchong block, southeastern Tibetan Plateau: A paleomagnetic and geochronologic study

• DOI: 10.1016/j.tecto.2014.04.032
• 发表时间: 2014-07
• 期刊: Tectonophysics
• 影响因子: 2.9
• 作者: D. Kornfeld;S. Eckert;E. Appel;L. Ratschbacher;Benita-Lisette Sonntag;J. Pfänder;L. Ding;Deliang Liu

Clockwise rotation of the Baoshan Block due to southeastward tectonic escape of Tibetan crust since the Oligocene

• DOI: 10.1093/gji/ggu009
• 发表时间: 2014-04
• 期刊: Geophysical Journal International
• 影响因子: 2.8
• 作者: D. Kornfeld;S. Eckert;E. Appel;L. Ratschbacher;J. Pfänder;Deliang Liu;L. Ding