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的资助使用表面波和体波层析成像技术，以检查胡安德富卡板块下的上地幔的结构。与卡斯卡迪亚倡议（CI）相关的OBS阵列将与陆地阵列一起使用，以调查板块的演变？地幔系统，从扩张中心的熔体产生和软流圈结构到俯冲带的板块变形和小规模对流，以及软流圈从海沟到山脊的回流。面波和体波数据将结合在一个联合反演，其次是波形建模，以改善层析成像图像。另一个目标是限制在实验之前和实验期间发生的中等规模地震的位置和机制。该项目将与CI相关的教育和外展工作合作，包括指导社区大学生，并为高中生的Seismometers@SchoolSites计划做出贡献。培养博士后和研究生。项目数据将被纳入本科课程和研究项目。PI将利用UO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