Uplift History of the Central Alaska Range

该项目使用磷灰石裂变径迹分析来研究阿拉斯加中部山脉的隆起。采样战略是收集麦金利地块外4000多米范围内的一个垂直剖面，以及横跨阿拉斯加中部山脉宽度的南北导线上的样品，重点是在北部与阿拉斯加中部山脉交界的德纳利断裂系统的麦金利段进行采样。在亚利桑那州立大学的裂变径迹测年实验室，磷灰石将被分离并通过外部探测器方法进行计数。还将进行轨道长度研究。该项目将确定抬升开始的时间、抬升速率，以及是否发生了一个以上的抬升时期。阿拉斯加中部山脉位于横跨阿拉斯加和不列颠哥伦比亚省的巨型弧线的顶端。它位于德纳利断层系统的南部，在那里垂直偏移量的估计仍然不受限制。横跨该断层系统的采样断面将确定不同股线的垂直偏移量，并将阿拉斯加中部山脉的隆升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.