Collaborative Research: Microearthquake Activity Across the Endeavor Segment of the Juan De Fuca Ridge

9403409 Purdy在两个月的时间里，将通过部署一个由15个海底地震仪组成的网络，研究Juan de Fuca山脊的Endeavour部分微地震活动的分布和特征。该阵列将跨越主要通风口附近的轴向山谷和西部侧翼，延伸约15公里。实验的目的是表征离轴微地震活动的分布和性质，并利用这些数据来评估和完善现有的年轻海洋地壳离轴运动时的构造演化模型，并从地震活动的最大深度作为与脊轴距离的函数来估计脆性-韧性过渡的深度。＊＊＊

9403409 Purdy The distribution and characteristics of microearthquake activity across the Endeavour 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 offaxis 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. ***