A Comparative Multichannel Seismic Investigation into the Structure of Two Polynesian Volcanic Chains: Marquesas and Societies

这是一个涉及两船和单船多道地震勘测的项目，对协会和马克萨斯在太平洋的热点链进行调查。这是一个与法国合作的项目。工作将包括广角和扩展展开的双船型线和单船MCS。这项研究旨在了解链东南端零年龄火山作用的性质、导致链西北端火山作用开始的因素以及热点与马克萨斯断裂带的关系。一个特别的目标是了解两种不同环境下的热点岩石圈相互作用--正常岩石圈和弱岩石圈。板块中火山作用及其与大洋岩石圈的相互作用是了解大洋盆地结构和演化的重要过程。这类活跃的震源地震研究将提供有关目前缺乏的火山负荷之下和周围岩石圈结构的重要详细信息。麦克纳特博士和她的同事是板块中火山活动、岩石圈结构以及多通道地震研究的带头人之一。

This is a project involving a two-ship and single ship multichannel seismic survey of the Society and Marquesas hot spot chains in the Pacific ocean. It is a collaborative project with the French. Work will include wide angle and expanding spread two-ship profiles and single ship MCS. The study is aimed at understanding the nature of zero age volcanism at the southeast end of the chains, the factors contributing to the onset of volcanism at the northwest end of the chains, and the relationship of the hot spots to the Marquesas Fracture Zone. A particular objective is to understand hot spotlithospheric interaction in two different setting--normal lithosphere and weak lithosphere. Mid-plate volcanism and its interaction with oceanic lithosphere is a process of fundamental importance in understanding the structure and evolution of ocean basins. Active source seismic studies such as this one will provide important detailed information regarding the structure of the lithosphere beneath and surrounding volcanic loads that is currently lacking. Dr. McNutt and her co-workers are among the leaders in the study of mid-plate volcanism and lithospheric structure, as well as multichannel seismics.