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

合作研究：使用 MCS 数据对胡安德富卡海岭下方的岩浆过程进行下一代成像

• 批准号: 1357076
• 负责人: Alistair Harding
• 金额: $ 20.84万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-04-15 至 2016-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1357076&HistoricalAwards=false
• 关键词: Collaborative; Research; Next; Generation; Imaging

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.

拟议的工作旨在扩大以前在Axial火山的研究，特别是2002年在那里的研究巡航，并寻求：1）处理该巡航剩余的Axial多通道地震（MCS）剖面; 2）过程两个“重复”2002年巡航的剖面图，以确定2011年喷发后整体结构的任何差异，并更好地对内部和基底岩浆房反射进行成像在新数据中使用额外的2公里偏移量; 3）重新处理胡安·德富卡海脊奋进段和裂缝段的部分沿着和横轴剖面，以使用新方法检查地壳加积的差异; 4）将这些方法推广到沉积差和沉积重的环境中的老化地壳。拟议的工作将提供沿胡安·德富卡海脊、特别是穿越轴火山的沿着海底下结构的更详细图像。该项目的成果将用于为里诺的内华达州大学国家地震实验室创建一个通过卡斯卡迪亚的“从山脊到俯冲”的板块构造虚拟旅游，每年有许多K-8学生访问该实验室。博士后研究人员将得到支持。