High Resolution Imaging of the Subducted Slab in the Cascadia Convergence Zone Using Teleseismic P Wave Conversions Recorded with a Dense Array of Seismometers

使用密集地震仪阵列记录的远震 P 波转换对卡斯卡迪亚辐合带中俯冲板片进行高分辨率成像

• 批准号: 9207181
• 负责人: John Nabelek
• 金额: $ 39.98万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-15 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9207181&HistoricalAwards=false
• 关键词: Resolution; Imaging; Subducted; Slab; Cascadia

This research is to study the deep structure of the Cascadia subduction zone in western central Oregon by means of converted teleseismic P waves, also known as the receiver function method. The experiment will collect data across a 200 km dense array of PASSCAL portable broad-band seismometers. With the array, the experiment will be able to trace the evolution of the crust as it is being absorbed into the mantle at depth. These results should help to understand the tectonic nature of the subduction zone and its associated seismic hazard. This research is a component of the National Earthquake Hazard Reduction Program.

这项研究是利用转换的远震P波（也称为接收函数法）研究俄勒冈州中西部卡斯卡迪亚俯冲带的深层结构。 该实验将收集 200 公里密集的 PASSCAL 便携式宽带地震仪阵列的数据。 通过该阵列，实验将能够追踪地壳在深处被地幔吸收时的演化。 这些结果应有助于了解俯冲带的构造性质及其相关的地震危险。 这项研究是国家地震减灾计划的一部分。