Collaborative Research: Next Generation Imaging of Magmatic Processes beneath the Juan de Fuca Ridge using MCS data

拟议的工作旨在扩展先前在轴向火山的研究，特别是2002年在那里的研究巡航，并寻求：1)处理从该巡航中剩余的轴向多通道地震（MCS）剖面；2)处理2002年巡航的两个“重复”剖面，以确定2011年喷发后整体结构的差异，并利用新数据中额外的2公里偏移更好地成像内部和基底岩浆室的反射；3)重新处理Juan de Fuca山脊Endeavor段和Cleft段的沿轴和横轴剖面，用新方法研究地壳增生的差异；4)将这些方法扩展到低沉积和重沉积环境中的老化地壳。更广泛的影响：拟议的工作将提供更详细的海底结构图像沿胡安德富卡山脊，特别是横跨轴火山。这些结果将有助于更好地理解洋中脊位置的地壳过程。该项目的成果将用于为位于里诺的内华达大学的国家地震实验室创建一个穿越卡斯卡迪亚的“山脊到俯冲”板块构造虚拟之旅，每年都会有许多K-8学生参观该实验室。资助博士后1名。

The proposed work aims to expand upon previous studies at Axial volcano, particularly a 2002 research cruise there, and seeks to: 1) process the remaining Axial multichannel seismic (MCS) profiles from that cruise; 2) process two "repeat" profiles from the 2002 cruise to identify any differences in overall structure after the 2011 eruption and better image the internal and basal magma chamber reflections using an additional 2 km of offset in the new data; 3) reprocess select along- and cross-axis profiles from the Endeavor and Cleft segments of the Juan de Fuca ridge to examine differences in crustal accretion using new methods; and 4) extend these methods to aging crust in poorly and heavily sedimented environments.Broader Impacts: The proposed work will provide more detailed images of sub-seafloor structure along the Juan de Fuca Ridge, particularly across Axial volcano. The results will lead to better understanding of the crustal processes at the mid-ocean ridge locations.The results of the project will be used to create a "ridge to subduction" virtual tour of plate tectonics through Cascadia for the National Seismological Laboratory at the University of Nevada, Reno which is visited annually by many K-8 students. A postdoctoral researcher will be supported.