Controlled source P- and S-wave tomography at the SAFOD site - direct imaging of petrological and fluid properties

这项建议的目的是调查帕克菲尔德圣安德烈亚斯断层的上地壳，在计划于2002年进行的深钻孔的位置对地震区的断层进行取样。该实验的主要目的是研究剪切波在沿着50 km长的测线上的传播。使用钻孔拍摄的S波生成和三分量地震传感器，我们将收集一个数据集适合于高分辨率成像层析技术。对拟议调查的解释将产生地壳上部5公里的结构信息。特别是断层在深部的准确位置及其附近的精细结构对于解释钻探结果将是非常重要的。拟议的实验，设计和现场测量的布局将与J. Hole密切合作（NSF提案，已获得资助）。

This proposal aims to investigate the upper crust at the San Andreas fault in Parkfield, sampling the fault in the seismogenic region at the location of a deep drill hole planned for 2002. The main target of the proposed experiment is the investigation of the shear wave propagation in the region along a 50 km long line. Using borehole shots for S-wave generation and three-component seismic sensors we will collect a data set suitable for high resolution imaging by tomographic techniques. The interpretation of the proposed investigation will result in structural information on the upper 5 km of the crust. In particular, the exact location of the fault at depth and the fine structure in its vicinity will be of great importance for the interpretation of the drilling results. The proposed experiment, design and layout of the field measurements will be carried out in close cooperation with J. Hole (NSF proposal, already funded).