Collaborative Research: Structure and Dynamics of the Lithosphere-Asthenosphere System Beneath the Juan de Fuca Plate

合作研究：胡安德富卡板块下方岩石圈-软流圈系统的结构和动力学

• 批准号: 1333196
• 负责人: Douglas Toomey
• 金额: $ 18.67万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1333196&HistoricalAwards=false
• 关键词: Collaborative; Research; Structure; Dynamics; Lithosphere

The PIs are funded to use surface and body wave tomographic techniques to examine the structure of the upper mantle beneath the Juan de Fuca Plate. OBS arrays associated with the Cascadia Initiative (CI) will be used in conjunction with land arrays to investigate the evolution of the plate?mantle system, from melt production and asthenospheric structure at the spreading center to plate deformation and small-scale convection at the subduction zone, as well as asthenospheric return flow from trench to ridge. Surface and body wave data will be combined in a joint inversion, followed by waveform modeling to refine tomographic images. An additional goal is to constrain the locations and mechanisms of moderate-sized earthquakes that occur before and during the experiment. The project will partner with education and outreach efforts associated with the CI, including mentoring community college students and contributing to the Seismometers@SchoolSites program for high school students. Post-doctoral scholars and graduate students will be trained. Project data will be incorporated into undergraduate coursework and research projects. The PIs will take advantage of the UO cloud computing facility for parts of the research.

PI 获得资助，使用表面波和体波断层扫描技术来检查胡安德富卡板块下方的上地幔结构。与卡斯卡迪亚计划（CI）相关的OBS阵列将与陆地阵列结合使用，以研究板块地幔系统的演化，从扩张中心的熔体生产和软流圈结构到俯冲处的板块变形和小规模对流区，以及从海沟到山脊的软流圈回流。表面波和体波数据将在联合反演中结合起来，然后进行波形建模以细化断层扫描图像。另一个目标是限制实验之前和实验过程中发生的中型地震的位置和机制。该项目将与 CI 相关的教育和外展工作合作，包括指导社区学院的学生以及为高中生的 Seismometers@SchoolSites 项目做出贡献。培养博士后学者和研究生。项目数据将纳入本科课程和研究项目。 PI 将利用俄勒冈大学云计算设施进行部分研究。

项目成果

Seismic anisotropy beneath the Juan de Fuca plate system: Evidence for heterogeneous mantle flow

• DOI: 10.1130/g37181.1
• 发表时间: 2015-12
• 期刊: Geology
• 影响因子: 5.8
• 作者: M. Bodmer;D. Toomey;E. Hooft;John Náb;lek;J. Braunmiller