Processed multichannel seismic data across the Juan de Fuca ridge flanks, acquired in 2002 as part of an investigation of axial crustal structure and alteration of the upper crust at the Juan de Fuca spreading center

This project was an integrated multichannel seismic investigation of the intermediate-spreading Juan de Fuca Ridge. The primary goals were: (1) to determine the location, size and physical properties of crustal magma bodies along the ridge and relate these properties to the recent eruptive history of the ridge, (2) to measure the variation in velocity and thickness of the indicators of magmatic state, and (3) to characterize the alteration history of the upper crust as a function of sedimentation history, crustal age and basement relief. Funding was provided by NSF grants OCE-0002488, OCE-0002551, and OCE-0002600.

本项目为针对中等扩张速率胡安·德富卡海岭（Juan de Fuca Ridge）的综合多道地震调查研究。本次研究的核心目标如下：（1）探明该海岭沿线地壳岩浆体的分布位置、规模与物理属性，并将这些属性与该海岭近期的火山喷发历史相关联；（2）测定表征岩浆活动状态的各类指标的地震波速与厚度变化情况；（3）基于沉积历史、地壳年龄与基底起伏特征，刻画上地壳的蚀变演化历程。本项目由美国国家科学基金会（National Science Foundation，NSF）资助的OCE-0002488、OCE-0002551及OCE-0002600三项拨款支持。