Seismicity and Structure of Axial Segment; Juan De Fuca Ridge

地震活动与轴段结构；

• 批准号: 9711700
• 负责人: Robert Sohn
• 金额: $ 50.94万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-15 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9711700&HistoricalAwards=false
• 关键词: Seismicity; Structure; Axial; Segment; Juan

9711700 Webb This is a seismic study of Axial volcano and the central JdF ridge using 16 OBSs and 4 OBHs deployed over an 8-month period. Data from earthquakes recorded during this time will be used to investigate the crust building process on the central JdF (1) by using the temporal and spatial patterns in seismicity and fault-plane mechanisms to infer along and across-axis variations in the stress field and to investigate the thermals tructure fromt he depth of the brittle-ductile transition, and (2) by using the travel times from a subset of the events to perform a tomographic inversion for the 3D velocity structure of Axial volcano.

9711700 Webb这是对轴向火山和JdF中央脊的地震研究，使用了16台地震仪和4台地震仪，历时8个月。在此期间记录的地震数据将用于研究JdF(1)中部的地壳构造过程，方法是利用地震活动的时空模式和断面机制来推断应力场的沿轴和跨轴变化，并从脆性-韧性转变的深度研究热结构。(2)利用事件子集的传播时间对轴向火山的三维速度结构进行层析反演。