Characterization and Detection of Mantle Discontinuities

全球地震学中一个尚未解决的主要问题是， 对地球结构和动力学的重要影响， 不连续性的检测和准确表征 在过渡区，弹性参数的跳跃是 大致知道，以及他们的平均位置，而 对另一些人来说，我们只有间接的证据证明他们的存在。 我们建议研究过渡的结构 区域，特别强调 折扣 为了实现这一目标，我们制定了一个程序， 用于从稀疏不连续性推断不连续性的性质， 三个分站的网络。 它使用了一种混合动力 反射率- WKBJ方法的系统生成的所有 不可忽略的振幅的相位与部分相互作用， 结合体波的最佳估计， 矢量位移来约束观察到的射线参数。 通过 结合各种反射和转换相位， 许多事件，在不同的深度和一系列的射线帕拉， 米，我们可以分开的影响跳跃波的速度， 密度，而通过使用宽带数据，我们也可以估计 厚

A major unresolved question in global seismology, the important implications for Earth structure and dynamics, remains the detection and accurate characterization of discontinuities of the transition zone, the jumps on elastic parameters are known approximately, as well as their average locations, while for others we have merely indirect evidence of their existence. We propose to investigate the structure of the transition zone, with particular emphasis on the characterization of discountinuities. To achieve this, we have developed a procedure for inferring the properties of a discontinuity from a sparse network of three commponent stations. This uses a hybrid reflectivity - WKBJ approach to the systematic generation of all phases of non-negligible amplitude that interact with a parti- cular boundary, combined with optimal estimates of body wave vector displacement to constrain the observed ray parameter. By incorporating a variety of reflected and converted phases for many events, at different depths and with a range of ray para- meters, we can separate the effects of jumps in wave speeds and density, while by using broad band data we can also estimate thickness.