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

马里亚纳俯冲工厂(MSF)多尺度地震成像的综合多机构努力。PIS将通过部署OBS与日本调查人员一起进行多通道地震反射剖面、可控震源广角反射/折射剖面以及对本地和远程地震的被动记录。这些数据将提供MSF的全面速度和衰减、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)地幔楔体的大规模流动，3)俯冲洋壳的速度结构，4)弧前、弧和残弧的地震地层学和结构，5)火山下方的岩浆室，6)可能的双地震带，7)孕震带的上倾和下倾界限。这项研究还将有助于马里亚纳岛弧系的规划和最终钻探。

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.