Uplift History of the Central Alaska Range

该项目利用磷灰石裂变径迹分析解决了阿拉斯加山脉中部的隆起问题。采样策略是收集麦金利地块范围超过4000米的垂直剖面，以及横跨阿拉斯加山脉中部宽度的南北横向样本，特别强调跨越阿拉斯加山脉中部向北边界的德纳里断层系统的麦金利段的采样。磷灰石将在亚利桑那州立大学的裂变径迹测年实验室通过外部探测器方法分离和处理计数。轨道长度研究也将进行。该项目将确定隆升开始的时间、隆升速率以及是否发生了不止一次的隆升。阿拉斯加山脉中部位于横跨阿拉斯加和不列颠哥伦比亚省的大弧形的顶端。它位于德纳里断裂系统的南部，在那里对垂直偏移的估计仍然没有限制。通过对该断层系统的取样样带，将确定各断层链之间的垂直偏移量，并将阿拉斯加山脉中部的隆起历史与阿拉斯加南部的构造发展联系起来。

This project addresses the uplift of the central Alaska Range using apatite fission track analysis. The sampling strategy is to collect one vertical profile, over 4000m in extent off the McKinley massif, as well as samples on a north-south traverse across the width of the central Alaska Range, placing particular emphasis on sampling across the McKinley segment of the Denali fault system that bounds the central Alaska Range to the north. Apatite will be separated and processed for counting by the external detector method in the fission track dating laboratory at Arizona State University. Track length studies will also be performed. The project will determine the time of initiation of uplift, uplift rates, and whether more than one period of uplift has occurred. The central Alaska Range lies at the apex of a mega-arc that stretches across Alaska and British Columbia. It lies south of the Denali fault system where estimates of vertical offset remain unconstrained. A sampling transect across this fault system will determine vertical offsets across the various strands and will place the uplift history of the central Alaska Range in context with the tectonic development of southern Alaska.