Collaborative Research: Role of Glaciers in the Exhumation and Topographic Development of the Active Chugach/St. Elias Orogen, Alaska

0001192 Meigs0001239 Spotila气候变化、侵蚀和地壳变形之间可能存在的反馈将注意力集中在活动造山系统的地形上。研究变形、剥蚀和地形发育之间的联系是复杂的，主要利用河流系统而不是冰川系统。冰川区具有不同于河流地形的独特地形形式，然而，对于以冰川侵蚀为主的地貌，诸如平均地形如何与岩石隆起模式有关的基本关系基本上是未知的。该项目将通过对阿拉斯加丘加赫/圣伊利亚斯山脉的研究，研究冰川侵蚀对地形、折返和变形的长期影响，这是一条活跃变形的冰川造山带。这些结果将使人们能够测试变形和冰川作用如何影响过去数百万年的造山地形。更好地了解冰川在山系中的作用，将为分析岩石记录中的古代碰撞带提供更完整的背景。

0001192 Meigs0001239 SpotilaThat feedbacks potentially exist between climate change, erosion, and crustal deformation has focused attention on the topography of active orogenic systems. Studies of linkages between deformation, denudation and topographic development are complex, and have primarily utilized fluvial rather than glacial systems. Glaciated regions have a characteristic topographic form that is distinct from that of fluvial terrains, however basic relationships such as how mean topography relates with patterns of rock uplift are essentially unknown for landscapes dominated by glacial erosion. This project will investigate the long-term consequences of glacial erosion for topography, exhumation and deformation by study of the Chugach/St. Elias Range, Alaska, an actively deforming glaciated orogenic belt. Results will enable testes of how deformation and glaciation have influenced orogenic topography over the last few million years. A better understanding of the role of glaciers in mountain system will provide a more complete context for the analysis of ancient collisional belts in the rock record.