Characteristics of the 670 km Seismic Discontinuity Beneath Subduction Zones

俯冲带下670 km地震间断面特征

• 批准号: 9004026
• 负责人: Mark Richards
• 金额: $ 8.82万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9004026&HistoricalAwards=false
• 关键词: Characteristics; 670; km; Seismic; Discontinuity

This research is to use the study of the S-P converted phase S670P generated at the 670 km discontinuity beneath subduction zones to constrain the nature of the discontinuity and its dynamical significance. After successful mapping beneath the Tonga subduction zone, new areas such as the Izu-Bonin, Marianas, Java, Japan, and Kurile arcs will be investigated. Moment tensor solutions, where available, will be used to account for amplitude effects. This work has significance in the current controversy as to the depth of penetration of the subducting slab into the lower mantle.

本研究是利用S-P转换相位的研究 S670 P生成于俯冲带下方670 km的不连续面 限制不连续性的性质及其 动力学意义 在成功映射到 汤加俯冲带、伊豆-博宁、马里亚纳群岛、 爪哇，日本和千岛群岛将进行调查。 矩张量 在可用的情况下，将使用解来解释振幅 方面的影响. 这项工作在当前的争议中具有重要意义 至于俯冲板块进入 下地幔