Pn Tomography and its Implication for Lithospheric Strength

这项研究是通过继续层析研究Pn速度和地壳厚度的横向变化来研究岩石圈的强度和构造。目标包括对净光速度和地壳厚度进行层析成像；模拟复杂的地壳和地幔结构对净光传播时间的影响；并根据区域构造解释结果。过去的工作已经绘制了中东、中亚和美国西部的PN图。这项工作将把这一地图扩展到欧洲和印度支那。数据库由ISC行程时间数据和本项目确定的行程时间组成。最终，最上面的地幔速度、地壳厚度和其他地球物理参数的定量知识将被用来将地球表面所看到的构造和地质与下面的地幔联系起来，以便深入了解塑造地球表面的过程。

This research is a study of lithospheric strength and tectonics by continued tomographic studies of lateral variations in Pn velocity and crustal thickness. The goals include tomographic mapping of Pn velocity and crustal thickness; modelling the effects of complex crust and mantle structure on Pn travel times; and interpreting the results in light of regional tectonics. Past work has mapped Pn in the Middle East, Central Asia, and the western United States. This work will extend that mapping into Europe and into Indochina. The data bases consist of ISC travel time data and travel times that are determined in this project. Ultimately, the quantitative knowledge of uppermost mantle velocity, crustal thickness, and other geophysical parameters will be used to link the tectonics and geology seen at the surface of the earth to the mantle beneath in order to gain insight into the processes that shape the earth's surface.