Integrated Geological and Geophysical Investigation of Blind Thrust Faults in the Region of the January 17, 1994 Northridge Earthquake

1994 年 1 月 17 日北岭地震地区盲冲断层综合地质和地球物理调查

• 批准号: 9416344
• 负责人: John Suppe
• 金额: $ 6.1万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-08-15 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416344&HistoricalAwards=false
• 关键词: Integrated; Geological; Geophysical; Investigation; Blind

9416344 Suppe This project uses geological and geophysical data combined with advanced techniques of structural modelling to obtain an integrated, self consistent solution for the three-dimensional blind-thrust geometry, slip vectors, and loading of the faults of the Northridge and San Fernando earthquakes and for other nearby blind thrust faults that may have been stressed by the closely related Northridge and San Fernando events. Refined fault geometries will be constrained by will tested theoretical relationships between fault shape and associated fold shape. The study will also determine whether there are other nearby fault segments that could slip in damaging earthquakes by using three-dimensional boundary element calculations to evaluate the stress changes on these faults due to the San Fernando and Northridge events. The results of this study will provide subsurface maps and cross sections of the San Fernando Valley and surrounding regions and will provide needed constraints on the presence and seismic potential of other blind faults in the region.

9416344 Suppe该项目使用地质和地球物理数据，结合先进的构造建模技术，为北岭地震和圣费尔南多地震的三维盲冲断层几何形状、滑动矢量和载荷以及可能受到密切相关的北岭和圣费尔南多事件的应力的附近其他盲冲断层获得一个完整的、自洽的解决方案。精细的断层几何形状将受到将检验的断层形状和相关褶皱形状之间的理论关系的约束。这项研究还将通过使用三维边界元计算来评估由于圣费尔南多和北岭事件而导致的这些断层上的应力变化，从而确定附近是否存在其他可能在破坏性地震中滑动的断层段。这项研究的结果将提供圣费尔南多山谷及其周围地区的地下地图和横截面，并将为该地区其他隐蔽断层的存在和地震潜力提供必要的限制。