Extrusion of the Greater Himalayan Crystalline in Himachal Pradesh, NW India

印度西北部喜马偕尔邦大喜马拉雅晶体的挤压

• 批准号: 166713538
• 负责人: Dr. Konstanze Stübner
• 金额: --
• 依托单位: Institut für Ionenstrahlphysik und Materialforschung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/166713538?language=en
• 关键词: Extrusion; Greater; Himalayan; Crystalline; Himachal

Extrusion of the Greater Himalayan Crystalline (GHC), a topic of ongoing debate about mechanisms of middle to lower crustal deformation in the India-Asia and other collision zones worldwide, ends laterally in the NW Himalaya. I have developed three models for the tectonic evolution of the NW Himalaya, which are discriminated based on the vorticity of pervasive ductile deformation in the GHC and on timing of deformation. To investigate the validity of these models, I propose a threefold approach: (1) vorticity and kinematic analysis, (2) multi-chronometer thermochronology, and (3) in-situ Th/Pb dating of metamorphic monazite and allanite. The latter is a relatively new method and this work will be an important step towards developing a new tool for dating greenschist-grade metamorphism and syn-metamorphic deformation. This work contributes to the understanding of the tectonic response of the middle to lower crust during collisional orogeny; specifically, it investigates extrusion of the GHC and interaction of its bounding faults, the South Tibetan detachment and the Main Central thrust.

大喜马拉雅结晶体（GHC）的挤压，印度-亚洲和世界范围内其他碰撞带中地壳变形机制的持续争论的主题，横向终止于西北喜马拉雅。我已经开发了三种模式的构造演化的西北喜马拉雅山，这是歧视的基础上普遍韧性变形的涡度在GHC和变形的时间。为了研究这些模型的有效性，我提出了一个三重的方法：（1）涡度和运动学分析，（2）多计时器热年代学，（3）在原地的Th/Pb年龄的变质独居石和褐帘石。后者是一个相对较新的方法，这项工作将是一个重要的一步，发展一个新的工具，确定绿片岩级变质和同变质变形。这项工作有助于了解碰撞造山过程中中下地壳的构造响应，特别是，它研究了GHC的挤出及其边界断层，藏南拆离和主中央逆冲断层的相互作用。

项目成果

A Quaternary fault database for central Asia

• DOI: 10.5194/nhess-16-529-2016
• 发表时间: 2015-09
• 期刊: Natural Hazards and Earth System Sciences
• 影响因子: 4.6
• 作者: Solmaz Mohadjer;T. Ehlers;R. Bendick;K. Stübner;Timo Strube

Monazite geochronology unravels the timing of crustal thickening in NW Himalaya

• DOI: 10.1016/j.lithos.2014.09.024
• 发表时间: 2014-12
• 期刊: Lithos
• 影响因子: 3.5
• 作者: K. Stübner;D. Grujic;R. Parrish;N. Roberts;A. Kronz;J. Wooden;T. Ahmad

Anomalously old biotite 40Ar/39Ar ages in the NW Himalaya

• DOI: 10.1130/l586.1
• 发表时间: 2017-06
• 期刊: Lithosphere
• 影响因子: 2.4
• 作者: K. Stübner;C. Warren;L. Ratschbacher;B. Sperner;R. Kleeberg;J. Pfänder;D. Grujic