Ridge-Transform Response to Changing Plate Kinematics: An Investigation using Fracture Zone Geoid Waveforms

对变化板运动学的岭变换响应：使用断裂带大地水准面波形的研究

• 批准号: 8812490
• 负责人: Peter Shaw
• 金额: $ 8万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-01 至 1990-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8812490&HistoricalAwards=false
• 关键词: Ridge; Transform; Response; Changing; Plate

This is a project to extend the PI's work on analyzing Seasat and Geosat geoid signals of fractures zones to small offset fracture zones from the North and South Atlantic. The altimeter data will first be decomposed using and Empirical Orthogonal Function (EOF) analysis, and from this simplified data set systematic variations of form and amplitude of the profiles will be interpreted in terms of various models that may be related to crustal thinning. Crustal thinning is expected to be the main cause of different geoid signals across small offset fracture zones. %%% Fracture zones are a fundamental feature of the seafloor. They represent part of a plate boundary and may be control magma segmentation processes along ocean ridge crests. Not much is understood about ridge-fracture zone intersections and the physical processes that operate there. The analyses to be performed during this project should provide useful information regarding fundamental geological processes on the seafloor.

这是一个项目，旨在将PI在分析裂隙带的Seasat和Geosat大地水准面信号方面的工作扩展到来自北大西洋和南大西洋的小型错开裂隙带。高度计数据将首先利用经验正交函数(EOF)分析进行分解，从这个简化的数据集，将根据可能与地壳变薄有关的各种模型来解释剖面形状和幅度的系统变化。地壳减薄预计将是小偏置断裂带不同大地水准面信号的主要原因。断裂带是海底的一个基本特征。它们代表了板块边界的一部分，并可能控制着沿洋脊峰顶的岩浆分割过程。关于山脊-断裂带的交叉点以及在那里运行的物理过程，人们了解的很少。在该项目期间进行的分析应提供有关海底基本地质过程的有用信息。