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.

9903026fischerthis项目是研究大陆地震至各向异性，该项目具有图像岩石圈变形和更深地幔流动的图案的潜力。 这项研究将逆转基本模式的瑞利波相和跨密集宽带阵列的振幅数据的变化，以对地幔各向异性的深度和侧向分布施加约束。 该研究将将这些模型与SKS和其他远程震荡阶段中的剪切波分裂的结果进行比较。 该计划是在几个地区进行这些反转：美国东北部和加拿大东南部的北美龙骨东部边缘，科罗拉多州北美龙骨的西边边缘，科罗拉多州高原和大盆地，以及沙特阿拉伯盾牌。