A Seismic Study of Subducted Lithosphere

俯冲岩石圈的地震研究

• 批准号: 9316012
• 负责人: Wang-Ping Chen
• 金额: $ 9.91万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-01 至 1997-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9316012&HistoricalAwards=false
• 关键词: Seismic; Study; Subducted; Lithosphere

9316012 Chen, W-P This research is a continuation of investigation of the mechanical state of the subducted lithosphere and its interaction with the surrounding mantle. Deep earthquakes in subduction zones of Izu-Bonin, Japan, and Ryukyu-Kyushu arcs have been numerous recently and have high-quality broad-band seismic recordings. This research involves precise determination of the rupture processes for approximately 35 large to moderate-sized events deeper than 100 km in these zones. The work will also involve investigation of the patterns of travel-time residuals and anomalies in pulse- width/amplitude of body waves from these events. The results will bear on questions of the origin of deep earthquakes and the depth of penetration of the subducted slab. ***

9316012 Chen, W-P 这项研究是俯冲岩石圈力学状态及其与周围地幔相互作用研究的延续。 日本伊豆-小笠原俯冲带和琉球-九州岛弧近年发生深部地震，并有高质量的宽带地震记录。 这项研究涉及精确确定这些区域 100 公里以上大约 35 个大到中型事件的破裂过程。 这项工作还将涉及对这些事件的传播时间残差模式和体波脉冲宽度/幅度异常的调查。 结果将涉及深部地震的起源和俯冲板片的穿透深度问题。 ***