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.

本项目旨在支持一项研究北纬24至29度大西洋中脊（MAR）构造的实地项目。主要工具是SeaMARC II，这些数据将由重力和磁力数据补充。沿裂谷的轴向不连续面和形态构造变化将连续覆盖至少100公里的距离。主要目的是了解沿缓慢扩张中心的火山和构造活动的变化，抵消MAR的小轴向不连续的性质，以及导致MAR分割的地幔过程。该研究代表了SeaMARC II在大西洋的首次使用。这是一项重要的研究，因为它将允许使用SeaMARC II工具对缓慢和快速扩张脊的形态和构造进行比较。