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

Kavner 0112448研究人员计划将地球的核幔边界作为一个电化学系统进行检查。 他们将进行一系列的活塞缸实验，旨在研究电场对金属硅酸盐界面的物理和化学行为的影响。 直流电阻测量和交流阻抗谱将被用来检查一个金属硅酸盐界面的电行为，和电子探针分析将记录一系列的阳极和阴极的界面的电负载的化学变化。 这些结果将被用来，反过来，显示化学和物理性质的差异覆盖的核幔边界的局部地区可能会转化为地球物理和地球化学观测，如一天的变化，磁场发电机的行为，并创建物理和化学结构的外核和下地幔。 我们的目标是扩大我们的理解的核幔边界，包括在高压和高温下的电气和电化学行为，检查电诱导的化学分区和由此产生的核幔动态耦合。

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.