Studies of Mantle Anisotropy with Long-Period Seismology

长周期地震学研究地幔各向异性

• 批准号: 9219367
• 负责人: Jeffrey Park
• 金额: $ 13万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219367&HistoricalAwards=false
• 关键词: Studies; Mantle; Anisotropy; Long; Period

This research is to continue study of the long-period seismic response of several idealized isotropic and anisotropic earth models to determine the observable aspects of anisotropy in the earth's upper mantle. The initial calculations suggest that upper-mantle azimuthal anisotropy of a few percent, spatially coherent over the length scale of a typical ocean basin, is sufficient to generate significant waveform anomalies in long- period surface waves. In this research the theory will be extended and tests will be done for different types of anisotropy in the upper mantle.

本研究将继续研究几种理想化各向同性和各向异性地球模型的长周期地震响应，以确定地球上地幔各向异性的可观测方面。 初步计算表明，上地幔方位各向异性百分之几，在典型海洋盆地的长度尺度上空间相干，足以在长周期表面波中产生显着的波形异常。 在这项研究中，该理论将得到扩展，并对上地幔不同类型的各向异性进行测试。