Transient Creep in Peridotite with Application to

大地震使地幔中的应力发生突然变化。它的震后变形是用GPS在地球表面观测到的。本项目是对大地震作用下深部地球材料行为的实验和理论研究。研究结果可用于计算机模拟，以更好地了解地震周期及其在地震灾害时空分布中的作用。当地幔受到大地震引起的应力突然变化时，它的物质行为将通过实验室岩石变形实验来检验。理论模型在数值模拟中从实验室推断到地球。该研究将有助于加深对地震后弛豫和冰川后反弹的认识。更广泛地说，它将加强对地震周期的理解，这是地球物理学中最重要的问题之一。这项研究在材料科学方面也有潜在的应用。

A large earthquake imposes a sudden change of stress in the earth's mantle. Its post-earthquake deformation is observed by GPS at the earth's surface. This project is an experimental and theoretical investigation of the material behavior of the deep earth in response to large earthquakes. The results can be implemented in computer simulations for better understanding of the earthquake cycle and its role in the spatial and temporal distribution of the earthquake hazard.The material behavior of the earth's mantle when it is subjected to a sudden change of stress by a large earthquake will be examined through laboratory rock deformation experiments. The theoretical model extrapolates from the laboratory to the earth in numerical simulations. This research will enhance understanding of post-seismic relaxation and postglacial rebound. More generally it will enhance understanding of the earthquake cycle, one of the most important problems in geophysics. The research also has potential applications in materials science.