Structural Thickening, Uplift, and Denudation of the Olympic Subduction Complex

奥林匹克俯冲杂岩的构造增厚、隆起和剥蚀

• 批准号: 9005777
• 负责人: Mark Brandon
• 金额: $ 11.44万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1995-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9005777&HistoricalAwards=false
• 关键词: Structural; Thickening; Uplift; Denudation; Olympic

The Cascadia convergent margin, which flanks the western side of Oregon, Washington and Vancouver Island, marks the subduction boundary between North America and the Juan de Fuca plate. The forearc region is underlain by lower Eocene basalt except in Olympic Peninsula section where uplift has tilted the basalt into a sleep east-plunging anticline and has exposed the underlying Olympic subduction complex. This research will continue a project aimed at understanding this anomalous uplift and its causes. Results are important to the timing and geometry of the Olympic subduction complex and has application to understanding other ancient subduction complexes.

卡斯卡迪亚会聚边缘，位于西部 俄勒冈州、华盛顿和温哥华岛的一侧，标志着 北美洲和胡安·德富卡之间的俯冲边界 板 弧前区下面是下始新世玄武岩 除了在奥林匹克半岛部分，那里的隆起使 玄武岩变成了一个沉睡的东倾背斜，并暴露了 潜在的奥林匹克俯冲复合体 这项研究将 继续一个旨在了解这种异常隆起的项目 及其原因。 结果对时间和几何形状很重要 奥林匹克俯冲复合体，并适用于 了解其他古老的俯冲复合体