Collaborative Research: Geodynamics Of Indentor Corners

这个项目将利用喜马拉雅造山带的东部构造来解决大陆碰撞地球动力学中的关键问题：造山带及其相关高原如何结束，造山过程中构造和地表过程如何相互作用形成地壳，以及变形在不同尺度上是如何分割的？需要检验的具体假设是：1)流变学控制着高原/凹陷边缘的地形和岩石圈力学；2)侵蚀控制着岩石圈的动力学，其程度与地壳增厚和侧向调节相同；两者之间的反馈最终决定了造山带的演化；以及3)在“构造”区域内，上地壳和下岩石圈变形完全脱钩。所使用的方法包括跟踪穿过东喜马拉雅构造中心区的质量通量的大小、速率和类型。为此，首席调查员将使用地质年代学、地貌学、GPS、岩石学、地震和构造技术，通过三维建模完全集成。

0003561HalletThis project will use the eastern syntaxis of the Himalayan orogen to address key questions in the geodynamics of continental collisions: how do orogens and associated plateaus come to an end, how do tectonic and surficial processes interact to shape the crust during orogeny, and how is deformation partitioned at various scales? Specific hypotheses to be tested are: 1) rheology controls topography and lithospheric mechanics across plateau/indentor margin; 2) erosion controls lithospheric dynamics to the same extent as crustal thickening and lateral accommodation; feedbacks between the two ultimately shape the evolution of the orogen; and 3) there is complete decoupling between upper crustal and lower lithospheric deformation within the "syntaxial" region. The approach to be used involves tracking the magnitude, rates, and type of mass fluxes through the central region of the eastern Himalayan syntaxis. To do this, the Principal Investigators will use geochronologic, geomorphic, GPS, petrologic, seismic, and structural techniques, fully integrated by three-dimensional modeling.***