Tensor Electromagnetic Profiling Across the San Andreas Fault

9316160 Booker 该项目涉及收集加利福尼亚州中部圣安德烈亚斯断层上的连续张量电磁剖面 (EMAP)。 该实验有可能解决与地震过程直接相关的目标，包括断层带内的高电导率和可能的高孔隙压力区域、断层带和围岩之间的电阻性膜和因此不透水的膜，以及脆性转变以下增强的地壳电导率。 然而，对地震发生深度的断层带内的电结构进行详细调查可能需要与深钻孔结合部署的受控电磁源。 详细了解背景电气结构是设计此类实验的关键要求，提供此信息与从 EMAP 数据中直接洞察的潜力同样重要。 ***

9316160 Booker This is a project involving the collection of a continuous tensor electromagnetic profile (EMAP) across the San Andreas Fault in central California. The experiment has the potential to resolve targets of direct relevance to the earthquake process including high conductivity and presumably high pore pressure regions within the fault zone, resistive and hence impermeable membranes between the fault zone and the country rock and enhanced crustal conductivity below the brittle-ductile transition. However, detailed investigation of electrical structure within the fault zone at seismogenic depths is likely to require a controlled electromagnetic source deployed in conjunction with a deep drill hole. Detailed knowledge of the background electrical structure is a key requirement for design of such an experiment and providing this information is as important as the potential for direct insight from the EMAP data. ***