Steep-Dip Seismic Reflection Imaging of the Shallow San Andreas Fault

浅层圣安德烈亚斯断层的陡倾地震反射成像

• 批准号: 9909228
• 负责人: John Hole
• 金额: $ 5万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909228&HistoricalAwards=false
• 关键词: Steep; Dip; Seismic; Reflection; Imaging

The PI proposes to perform supplemental data analyses on a 5-km line of combined seismic reflection and refraction data collected by the USGS near Parkfield, California. The 1998 Parkfield survey used acquisition parameters appropriate for imaging reflections from steeply dipping structures, such as the near-vertical San Andreas Fault, and data plots from the experiment demonstrate the existence of the expected type of fault-plane reflections. The PI will employ prestack migration to create the first-ever seismic reflection image that includes a major near-vertical strike-slip fault as a reflector. The image to be produced by this proposal will directly constrain location and potentially internal properties of the fault zone in the upper 1 kilometer of the crust.

PI建议对加州帕克菲尔德附近USGS收集的5公里地震反射和折射数据进行补充数据分析。 1998年Parkfield勘测使用了适合于从陡峭倾斜结构（如近乎垂直的圣安德烈亚斯断层）反射成像的采集参数，实验数据图显示存在预期类型的断层面反射。 PI将采用叠前偏移来创建有史以来第一个地震反射图像，其中包括一个主要的近垂直走滑断层作为反射层。 这一提议产生的图像将直接限制地壳上部1公里断层带的位置和潜在的内部性质。