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

小行星9870144 活动构造学中的一个主要问题是冰川作用与活动断层运动之间的关系。 冰盖厚度的变化会引发地壳运动甚至地震吗？ 该项目概述了一项工作计划，将在很长一段时间内区分由于活跃的构造过程和冰川消退引起的隆起。 在这个项目中，将采用几种方法来获得隆起历史。 这些包括地层学、树木年代学和GPS测量，将重新占据潮汐基准。这项建议将提供必要的数据基础，以区分冰川和构造变形，并允许在阿拉斯加这一地区的应变和变形分区。如果成功的话，它还将提供阿拉斯加更长的变形历史和地震周期，可以与卡斯卡迪亚其他令人不安的安静区进行比较。

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.