Seismic Signatures of Segmentation Processes Along the Mid- Atlantic Ridge

大西洋中脊沿线分割过程的地震特征

• 批准号: 9019683
• 负责人: G. Michael Purdy
• 金额: $ 68.81万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-02-15 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9019683&HistoricalAwards=false
• 关键词: Seismic; Signatures; Segmentation; Processes; Along

This project will deploy an array of 14 three-component ocean- bottom seismometers to record earthquakes for a period of about eight weeks at two sites along the northern Mid-Atlantic Ridge. The objectives are to: (1) locate the hypocenters of earthquakes within the median valley; (2) conduct source mechanism studies of located earthquakes; (3) invert P and S wave travel time and attenuation differences; and (4) define the relationships among earthquakes locations and source characteristics, and structural heterogeneity to segment length, median valley width, axial topographic relief and mantle Bouguer anomaly.

该项目将在北部中大西洋山脊沿岸的两个地点部署14个三组分海底地震仪的阵列，以记录大约八个星期的地震。目标是：（1）在中间山谷内找到地震次数； （2）进行现场地震的来源机理研究； （3）反转P和S波旅行时间和衰减差异； （4）定义地震位置和源特征之间的关系，以及与节段长度，中间山谷宽度，轴向地形浮雕和地幔布格尔异常的结构异质性。