Direct Imaging of Crust and Upper Mantle Structure with Broadband Seismic Arrays

9904043Pavlis本项目提出在宽带地震阵列上开发P - S转换相直接成像新技术。PI建议在四个主要分析前沿开展工作，以开发一种可应用于大型宽带数据集的工作程序，如IRIS站和临时PASSCAL部署收集的数据集：1)波场分离和反褶积；2)了解加权叠加算法的优化设计方法；3)静力学;4)多源叠加与波场成像。这项新技术将发展成为一种可行的程序，并用于处理两个不同尺度的宽带阵列：来自科罗拉多州西北部Lodore阵列的数据将被处理，以确定与科罗拉多高原和怀俄明州克拉通之间的前寒武纪缝合相关的下地壳和上地幔结构的差异。部署在天山的阵列数据将用于确定主要上地幔不连续面的地形和大陆内碰撞带地壳结构的横向变化。

9904043Pavlis This project proposes to develop new techniques in direct imaging of P to S converted phases on broadband seismic arrays. The PI proposes to work on four main analytical fronts for developing a working procedure that can be applied to large, broadband datasets such as those collected by IRIS stations and temporary PASSCAL deployments: 1) wavefield separation and deconvolution; 2) understanding optimal ways to design the weighted stacking algorithm; 3) statics; and 4) multisource stacking and wavefield imaging. The new technique will be developed into a workable procedure and used to process two broadband arrays at different scales: data from the Lodore array in northwestern Colorado will be processed to define the difference in lower crust and upper mantle structure associated with a Precambrian suture between the Colorado Plateau and the Wyoming craton. Data from an array being deployed in the Tien Shan will be used to define topography on major upper mantle discontinuities and lateral variations in crustal structure at an intracontinental collisional zone.