CSEDI: Cooperative Studies of Electrochemistry at the Core-Mantle Boundary

CSEDI：核幔边界电化学合作研究

• 批准号: 0112448
• 负责人: Abby Kavner
• 金额: $ 9.61万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0112448&HistoricalAwards=false
• 关键词: CSEDI; Cooperative; Studies; Electrochemistry; Core

Kavner 0112448 The investigators plan to provide an examination of the Earth's core-mantle boundary as an electrochemical system. They will undertake a series of piston-cylinder experiments designed to investigate the effect of an electric field on the physical and chemical behavior at metal-silicate interfaces. Both DC resistance measurements and AC impedance spectroscopy will be employed to examine the electrical behavior of a metal-silicate interface, and electron microprobe analysis will record changes in chemistry for a series of anodic and cathodic electrical loadings of the interface. These results will be used, in turn, to show how differences in chemistry and physical properties overlying local areas of the core-mantle boundary may translate into geophysical and geochemical observables such as length of day variations, the behavior of the magnetic field dynamo, and creation of physical and chemical structure in the outer core and lower mantle. The goal is to extend our understanding of the core-mantle boundary to encompass electrical and electrochemical behavior at high pressures and temperatures, examining both electrically-induced chemical partitioning and resultant core-mantle dynamic coupling.

Kavner 0112448调查人员计划对地球核心掩体边界进行检查作为电化学系统。 他们将进行一系列活塞缸实验，旨在研究电场对金属硅酸盐界面上物理和化学行为的影响。 DC电阻测量和AC阻抗光谱都将用于检查金属硅酸盐界面的电气行为，并且电子微探针分析将记录一系列界面的阳极和阴极电气负荷的化学变化。 反过来，将使用这些结果来说明如何在核心壳边界的局部区域的化学和物理特性差异转化为地球物理和地球化学可观察物，例如日期变化的长度，磁场发电机的行为以及外部核心和下层壁板的物理和化学结构的创造。 目的是扩展我们对核心掩体边界的理解，以在高压和温度下涵盖电化学和电化学行为，从而检查电气诱导的化学分配以及由此导致的核心棒球动态耦合。