Uplift History of the Central Alaska Range

阿拉斯加中部山脉的隆升历史

• 批准号: 8821937
• 负责人: Edmund Stump
• 金额: $ 9.93万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-01 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8821937&HistoricalAwards=false
• 关键词: Uplift; History; Central; Alaska; Range

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.

该项目涉及阿拉斯加山脉中部的隆起 使用磷灰石裂变径迹分析。 抽样策略是 收集一个垂直剖面，在4000米的范围内， 麦金利湖，以及南北横贯的样本 横跨阿拉斯加山脉中部， 强调在Denali的麦金利部分进行采样 北界阿拉斯加山脉中部的断层系统。 磷灰石将被分离和处理， 裂变径迹测年实验室外部探测器法. 亚利桑那州立大学。 轨道长度研究也将 执行。 该项目将确定启动的时间， 隆升，隆升速率，以及是否超过一个时期的隆升 已经发生了 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巨型弧。 它 位于德纳里断层系统的南部， 偏移保持不受约束。 一条横穿这片区域的样带 断层系统将决定各种断层之间的垂直偏移 将阿拉斯加中部的隆起历史 范围与阿拉斯加南部的构造发展有关。