Looking Further Back in Time at Flank Degradation Processes and Volcanic Edifice Evolution on the Northwestern Hawaiian Ridge

该项目将分析和解释在夏威夷西北群岛Papahânaumokuâkea海洋国家纪念碑的两次非常成功的研究考察中获得的多波束测深数据。位于夏威夷主岛以西的这一地区的火山的大部分历史仍然缺乏记录。 这项研究的重点是了解夏威夷群岛上常见的巨型山体滑坡的形成。 主要目标是记录火山如何随着时间的推移而形成和坍塌，并记录山体滑坡的频率和规模，以评估它们在夏威夷和其他岛屿国家的危害。 大型滑坡能够产生海啸，因此对社会构成重大风险。 研究结果将有助于国家纪念碑的管理和永久化，特别是生活在火山上的生物群落。一名研究生将接受数据分析和解释方面的培训，在2014年Falkor号研究船的两次航行中从夏威夷海脊获取了大量地球物理数据。 这两次为期36天的考察主要由施密特海洋研究所与国家科学基金会和诺阿共同赞助，目的是在夏威夷群岛西北部的Papahânaumokuâkea海洋国家纪念碑内进行多波束和势场测绘。 拟议的工作将使用测深数据来检查近50个巨大的海底滑坡及其沉积物，这些滑坡及其沉积物以前使用20多年前收集的低分辨率数据绘制在该地区。 其主要目标是进行详细的解释旧的GSL提供一个更大的统计基础，更大的各种源建筑物的形态和结构设置，并在主要岛屿和世界各地的巨型海底滑坡的时间比较。

The project will analyze and interpret multibeam bathymetry data obtained during two highly successful research expeditions to the Papahânaumokuâkea Marine National Monument in the Northwestern Hawaiian Islands. Much of the history of the volcanoes located in this area west of the main Hawaiian Islands remains poorly documented. This study focuses on understanding the formation of the giant landslides that are common on the Hawaiian Islands. The primary goals are to document how volcanoes build and then collapse over time and to document the frequency and size of landslides to assess the hazard that they present in Hawaii and other island nations. Large landslides have the ability to generate tsunamis and thus pose a significant risk to society. The results will aid the management and perpetuation of the national monument, most notably the biological communities living on the volcanoes. A graduate student will be trained in data analysis and interpretation.An extensive set of geophysical data was acquired from the Hawaiian Ridge during two cruises on the Research Vessel Falkor in 2014. The purpose of the two 36-day expeditions, primarily sponsored by the Schmidt Ocean Institute in conjunction with NSF and NOAA, was to carry out multibeam and potential field mapping within the the Papahânaumokuâkea Marine National Monument in the Northwestern Hawaiian Islands. The proposed work will use the bathymetry data to examine the nearly 50 giant submarine landslides and their deposits previously mapped in the region using lower-resolution data collected over 20 years ago. The main objective is to carry out detailed interpretations of the older GSLs to provide a larger statistical base, a greater variety of source edifice morphologies and structural settings, and a longer temporal comparison with the giant submarine landslides in the main islands and worldwide.