Discrimination of Paleoseismicity from Coupled Interplate Subduction and Locked Upperplate Deformation Recorded in Salt Marsh Sequences of a Convergent Margin

辐合边缘盐沼序列记录的耦合板间俯冲和锁定上板变形判别古地震活动

• 批准号: 8903903
• 负责人: Curt Peterson
• 金额: $ 3万
• 依托单位: Portland State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-09-01 至 1991-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8903903&HistoricalAwards=false
• 关键词: Discrimination; Paleoseismicity; Coupled; Interplate; Subduction

This research will examine coastal marsh sequences in the Pacific Northwest for evidence of seismic activity. Sediment coring and age dating of peats in the section will be the major analysis method. The sediment record needs a realistic evaluation of seismic versus non-seismic causal events. Temporal distributions of late Holocene paleoseismicity and coastal deformation are a major objective of this study in order to bear on the debatable but important question of whether there are past major earthquakes recorded in the late Holocene coastal marsh sequences. This research bears directly on the question of the possibility of a major subduction-type earthquake along the Pacific Northwest coastal region, and therefore is an important contribution to the National Earthquake Hazard Reduction Program.

这项研究将检查海岸沼泽序列 太平洋西北部地震活动的证据。 沉积物 该剖面泥炭的取芯和年龄测定将是主要的 分析方法 沉积物记录需要一个现实的 地震与非地震因果事件的评价。 时间 晚全新世古地震活动与海岸带分布 变形是本研究的一个主要目标， 关于过去是否存在一个有争议但重要的问题， 全新世晚期沿海沼泽记录的大地震 序列的 这项研究直接关系到 沿着 西北太平洋沿岸地区，因此是重要的 为国家地震减灾计划捐款。