The Three-Dimensional Structure and Anisotropy of Ocean Crust at DSDP Site 418

该项目的目的是通过分析和解释在北大西洋西部ODP102航段418站的一次实验期间收集的钻孔地震数据，建立一个更现实的大洋地壳结构模型。这项分析将能够确定地壳中的横向不均匀性。该项目的最终目标是更好地了解海底新洋壳演化所涉及的过程，特别是热液和成岩过程。这项建议的资金来源是：1)完成对418测井现场采集的井下地震资料的分析；2)综合418测点的井下地震资料、物性测量和测井结果；3)开展二维随机介质中波传播的有限差分合成地震记录研究。

The purpose of this project is to develop a more realistic model of oceanic crustal structure by analyzing and interpreting borehole seismic data collected during an experiment at site 418 during ODP Leg 102 in the western North Atlantic. The analysis will allow the determination of lateral inhomogeneities in the crust. The ultimate goal of the project is to understand better the processes involved in the evolution of new oceanic crust beneath the seafloor, particularly hydrothermal and digenetic processes. This proposal as funded is 1) to complete the analysis of borehole seismic data collected at DSDP Site 418, 2) to synthesize the borehole seismic results with physical properties measurements and well logging at Site 418, and 3) to carry out a finite difference synthetic seismogram study of wave propagation in two-dimensional random media.