US-Japan Collaborative Research: Multi-Scale Seismic Imaging of the Mariana Subduction Factory

美日合作研究：马里亚纳俯冲工厂的多尺度地震成像

• 批准号: 0002878
• 负责人: John Hildebrand
• 金额: $ 32.85万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-10-01 至 2005-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002878&HistoricalAwards=false
• 关键词: US; Japan; Collaborative; Research; Multi

An integrated multi-institutional effort of multi-scale seismic imaging of the Mariana Subduction Factory (MSF). The PIs will conduct multi-channel seismic reflection profiling, controlled-source wide-angle reflection/refraction profiling and passive recording of local and teleseismic earthquakes through OBS deployment to be carried out with Japanese investigators. The data will provide a comprehensive velocity and attenuation, structural and stratigraphic image of the MSF. The principal objectives of the study are to understand: 1) velocity and attenuation structure of the mantle, 2) large-scale flow of the mantle wedge, 3) velocity structure of the subducting oceanic crust, 4) seismic stratigraphy and structure of the forearc, arc and remnant arc, 5) the magma chamber below the volcanoes, 6) a possible double seismic zone, and 7) updip an downdip limits of the seismogenic zone. The study will also help in the planning and eventual drilling in the Mariana island arc system.

马里亚纳俯冲工厂（MSF）多尺度地震成像的综合多机构努力。这些专业人员将进行多道地震反射剖面测量、受控源广角反射/折射剖面测量，并通过与日本调查人员一起部署的OBS被动记录当地和东南亚地震。这些数据将提供MSF的综合速度和衰减、结构和地层图像。研究的主要目的是了解：1）地幔的速度和衰减结构，2）地幔楔的大规模流动，3）俯冲洋壳的速度结构，4）弧前、弧和残余弧的地震地层学和结构，5）火山下面的岩浆房，6）可能的双地震带，孕震带的上倾和下倾界限。该研究还将有助于马里亚纳岛弧系统的规划和最终钻探。