Transient Creep in Peridotite with Application to

橄榄岩中的瞬态蠕变及其应用

• 批准号: 1620474
• 负责人: Reid Cooper
• 金额: $ 24.42万
• 依托单位: Brown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1620474&HistoricalAwards=false
• 关键词: Transient; Creep; Peridotite; Application

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.

大地震使地幔的应力发生突然变化. 它的震后变形是由GPS在地表观测的。该项目是一个实验和理论研究的材料行为的深层地球对大地震的反应。 结果可以在计算机模拟中实现，以便更好地了解地震周期及其在地震危险时空分布中的作用。地幔在大地震应力突然变化时的材料行为将通过实验室岩石变形实验来检查。理论模型在数值模拟中从实验室外推到地球。 这项研究将有助于加深对地震后松弛和冰后期回弹的理解。 更一般地说，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。该研究在材料科学中也有潜在的应用。