Structure of Two Polynesian Volcanic Chains. Marquesas and Societies

这是一个涉及两艘船和单艘船多通道地震调查的项目，对太平洋的社会和马克萨斯热点链进行调查。这是一个与法国合作的项目。工作将包括广角和扩展扩展双船剖面和单船MCS。研究的目的是了解链东南端零年龄火山活动的性质，链西北端火山活动发生的因素，以及热点与Marquesas断裂带的关系。一个特别的目标是了解热点岩石圈在两种不同环境下的相互作用——正常岩石圈和弱岩石圈。中板块火山活动及其与海洋岩石圈的相互作用是认识海洋盆地结构和演化的一个重要过程。像这样的活源地震研究将提供关于火山荷载下和周围岩石圈结构的重要详细信息，这是目前所缺乏的。麦克纳特博士和她的同事们是研究中板块火山活动、岩石圈结构以及多通道地震的领军人物。

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.