1994 Northridge: Search for a south-dipping blind thrust based on subsurface geology

1994年北岭：根据地下地质寻找南倾盲目冲断层

• 批准号: 9416121
• 负责人: Robert Yeats
• 金额: $ 5.5万
• 依托单位: Oregon State 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 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9416121&HistoricalAwards=false
• 关键词: 1994; Northridge; Search; south; dipping

9416121 Yeats This project will map the three-dimensional geology of the northern San Fernando Valley using surface data and subsurface data from oil and water wells. Preliminary work in the Ventura basin to the east of the San Fernando Valley has shown that the Santa Susana fault steepens down only where north-dipping reverse faults overlie south-dipping blind thrusts. Other preliminary work indicates that there is a north-vergent anticline with its crest at Oat Mountain near the maximum uplift recorded by the January 17, 1994 Northridge earthquake; the north flank of the anticline is thought to be related to the blind thrust. Mapping surface and subsurface data in the northern San Fernando Valley will provide a detailed evaluation of the presence and seismic potential of other blind thrusts in the region.

9416121 Yeats 该项目将利用来自油井和水井的地表数据和地下数据绘制圣费尔南多谷北部的三维地质图。 圣费尔南多谷以东文图拉盆地的初步工作表明，圣苏珊娜断层只有在北倾逆断层覆盖南倾盲冲断层时才会变陡。 其他初步工作表明，存在一个向北倾斜的背斜，其顶部位于燕麦山，接近 1994 年 1 月 17 日北岭地震记录的最大隆起；背斜北侧被认为与盲目逆冲有关。 绘制圣费尔南多谷北部的地表和地下数据将对该地区其他盲冲断层的存在和地震潜力进行详细评估。