Microearthquake Activity Across the Endeavour Segment of the Juan De Fuca Ridge

胡安德富卡海岭奋进段的微地震活动

• 批准号: 9403668
• 负责人: William Wilcock
• 金额: $ 21.59万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9403668&HistoricalAwards=false
• 关键词: Microearthquake; Activity; Across; Endeavour; Segment

9403668 Wilcock The distribution and characteristics of microearthquake activity across the Endeavor segment of the Juan de Fuca ridge will be studied by deploying a network of 15 ocean bottom seismometers for a two month period. The array will span the axial valley in the vicinity of the main vent field and the western flanks out to about 15 km. The objectives of the experiment are to characterize the distribution and nature of off- axis microearthquake activity and to use these data to evaluate and refine existing models of the tectonic evolution of yound oceanic crust as it moves off axis, and to estimate the depth of the brittle-ductile transition from the maximum depth of seismicity as a function of distance from the ridge axis. ***

小行星9403668 将通过部署一个由15个海底地震仪组成的网络，为期两个月，研究胡安·德富卡海脊奋进段的微地震活动的分布和特征。 阵列将跨越主喷口区附近的轴向山谷和西翼，延伸约15公里。 实验的目的是确定离轴微地震活动的分布和性质，并利用这些数据来评价和改进现有的海洋地壳离轴运动时的构造演变模型，并根据地震活动的最大深度，估计脆-韧性过渡的深度，作为离海脊轴距离的函数。 ***