A 2-D SeaMARC II/Gravity Study of Near-Axis "Gravity Rolls" on the Southern East Pacific Rise

这是一个确定东太平洋南部隆起上跨颗粒重力滚的起源时间、与地幔上升流的联系以及发展模式的项目。主要调查人员将在16至19日南太平洋隆起的西侧对0至600万年前的地壳进行SeaMARC II和重力测量。SeaMARC的广泛覆盖还将用于解决与大型偏移重叠传播中心的演变有关的问题。%SeaMARC II是一种海底测绘工具，广泛用于提供广泛的水深测量和侧向扫描图像。这些数据将提供有关海底形态和构造历史的重要信息，并将有助于更好地确定重力数据的地形改正。交叉颗粒重力滚是最初在卫星数据中检测到的异常特征。这些有趣和反常的特征还没有从水面舰艇上得到彻底的研究。多年来，首席调查员一直在海洋构造和重力数据解释领域发挥领导作用。他们是唯一适合这项研究的人。

This is a project to determine the time of origin, linkage to mantle upwelling, and mode of development of cross-grain gravity rolls on the southern East Pacific Rise. The principal Investigators will carry out SeaMARC II and gravity surveys of 0 to 6 million year old crust on west flank of the East Pacific Rise between 16 and 19 South. The extensive SeaMARC coverage will also be used to address problems relating to the evolution of large offset overlapping spreading centers. %%% SeaMARC II is a sea floor mapping tool that is used extensively to provide extensive bathymetric and side scan imagery. The data will provide important information on the morphology and tectonic history of the sea floor and will also assist in making better determinations of topographic corrections to the gravity data. The cross grain gravity rolls are anomalous features originally detected in satellite data. These interesting and anomalous features have not been thoroughly studied from a surface ship. The Principal Investigators have provided leadership in the area of marine tectonics and gravity data interpretation for many years. They are uniquely well qualified for this study.