Surface Wave Constraints on Azimuthally Anisotropic Mantle Structure Beneath Continents

大陆下方方位各向异性地幔结构的表面波约束

• 批准号: 9903026
• 负责人: Karen Fischer
• 金额: $ 21.98万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903026&HistoricalAwards=false
• 关键词: Surface; Wave; Constraints; Azimuthally; Anisotropic

9903026FischerThis project is to study continental seismic anisotropy, which has the potential to image patterns of lithospheric deformation and deeper mantle flow. The study will invert variations in fundamental mode Rayleigh wave phase and amplitude data across dense broadband arrays in order to place constrains on the depth and lateral distribution of mantle anisotropy. The study will compare these models against results from shear wave splitting in SKS and other teleseismic phases. The plan is to carry out these inversions in several regions: the eastern margin of the North American keel in the northeastern U.S. and southeastern Canada, the western margin of the North American keel in Colorado, the Colorado Plateau and Great Basin, and the Saudi Arabian Shield.

9903026Fischer该项目是研究大陆地震各向异性，它具有成像岩石圈变形和更深地幔流动模式的潜力。 这项研究将反演密集宽带阵列中基模瑞利波相位和振幅数据的变化，以限制地幔各向异性的深度和横向分布。 该研究将这些模型与SKS和其他地震阶段的剪切波分裂结果进行比较。 该计划是在几个地区进行这些反转：在美国东北部和加拿大东南部的北美龙骨的东部边缘，在科罗拉多的北美龙骨的西部边缘，科罗拉多高原和大盆地，以及沙特阿拉伯地盾。