Uplift and Seismicity in Northern Southeast Alaska: Tectonic Stress or Glacial Unloading?

9870144莫蒂卡活动构造学中的一个主要问题与冰川作用和活动断裂运动之间的关系有关。冰盖厚度的变化会引发构造运动甚至地震吗？这个项目概述了一个工作计划，它将在很大程度上区分活动构造过程引起的隆起和冰川消融。在这个项目中，将使用多种方法来获取隆起历史。其中包括地层学、树状年代学和GPS测量，它们将重新使用潮汐基准。这一建议将提供必要的数据库，以区分冰川变形和构造变形，并允许阿拉斯加这一地区的应变和变形划分。如果成功，它还将提供阿拉斯加更长的形变和地震周期历史，可以与卡斯卡迪亚其他令人不安的安静地带相比较。

9870144 Motyka A major question in active tectonics relates to the relationship between glaciation and active fault motion. Can the changing thickness of ice caps trigger tectonic motions or even earthquakes? This project outlines a work plan that will go a long way to discriminating between uplift due to active tectonic processes and to deglaciation. In this project several methods will be employed to obtain uplift histories. These include stratigraphy, dendrochronology, and GPS measurements that will reoccupy tidal benchmarks. This proposal will provide the data base necessary to discriminate between glacial and tectonic deformation, and allow strain and deformation partitioning in this region of Alaska. If successful it will also provide a longer history of deformation and the earthquake cycle in Alaska which can be compared to other troubling quiet zones of Cascadia.