Mantle Control of a Dynamically Evolving Spreading Center

动态演化扩张中心的地幔控制

• 批准号: 8817310
• 负责人: Kenneth Macdonald
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-01 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817310&HistoricalAwards=false
• 关键词: Mantle; Control; Dynamically; Evolving; Spreading

The objective of this project is to test several ideas concerning the dynamic processes responsible for cresting spatial and temporal variation in ridge geometry on the slow- intermediate spreading rate ridge system in the South Atlantic from 31 to 36 South. Program involves two ship board legs to conduct geophysical studies including gravity, magnetics, and seismic refraction, along with Seabeam and dredging. Shipboard program is to be followed by lab based geochemical analysis and 3 dimensional numerical modeling of results. %%% This is an exciting project from a first rate team of investigators who are attempting a very thorough study of fundamental processes at ridge crests. The multi-disciplinary approach is a positive step forward, as is the idea of studying deep seated process such as mantle upwelling in conjunction with their surface expression in gravity, and geochemistry.

该项目的目的是检验关于南大西洋31至36度南太平洋中低扩展速率脊线系统脊线几何空间和时间变化的动态过程的几个观点。该计划包括两个船板腿，以进行地球物理研究，包括重力、磁力和地震折射，以及海梁和疏浚。船上计划之后将进行基于实验室的地球化学分析和结果的三维数值模拟。%这是一个来自一流研究团队的令人兴奋的项目，他们正在尝试对山脊的基本过程进行非常彻底的研究。多学科方法是向前迈出的积极一步，研究深部过程，如地幔上涌及其在重力和地球化学中的表面表达的想法也是如此。