A SEAMARC II Investigation of the Mid-Atlantic Ridge Between 24'N - 29'N

SEAMARC II 对 24N - 29N 之间大西洋中脊的调查

• 批准号: 8709615
• 负责人: G. Michael Purdy
• 金额: $ 19.92万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-15 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8709615&HistoricalAwards=false
• 关键词: SEAMARC; II; Investigation; Mid; Atlantic

This project is to support a field program to study the tectonics of the Mid-Atlantic Ridge (MAR) from 24 to 29 degrees North latitude. The principal tool is SeaMARC II, and these data will be complemented by gravity and magnetics data. Continuous coverage of the axial discontinuities and the morphotectonic variations along the rift valley over a distance of at least 100 km will be obtained. The main objective is to understand the variations in volcanic and tectonic activity along a slow spreading center, the nature of small axial discontinuities that offset the MAR, and the mantle processes that lead to segmentation of the MAR. The proposed research represents the first use of SeaMARC II in the Atlantic. This is an important study because it will allow a comparison between the morphology and tectonics of slow and fast spreading ridges using the SeaMARC II tool.

该项目旨在支持一项现场计划，以研究北纬24至29度的大西洋山脊（MAR）的构造。 主要工具是SeamArc II，这些数据将由重力和磁数据补充。 将在至少100 km的距离内连续覆盖轴向不连续性和沿裂谷的形态变化。主要目的是了解沿缓慢扩散中心的火山和构造活动的变化，偏离MAR的小轴向不连续性的性质以及导致MAR分割的地幔过程。拟议的研究代表了大西洋中Seamarc II的首次使用。 这是一项重要的研究，因为它将允许使用Seamarc II工具的慢速和快速扩散脊的形态和构造之间进行比较。