CSEDI Collaborative Research: Redox State of the Earth's Interior

小行星9710003 PI将使用高压实验（多砧装置和激光加热金刚石单元）和第一原理量子力学计算的组合来解决两个主要的地质问题：1）氧化还原状态如何影响地幔和核心主要成分的相对稳定性？氧化还原状态如何影响重要元素在地幔和核相之间的分配？ 他们的目标是开发关于地球氧化还原状态的新的研究途径，从实用到基础：例如，从开发在实验中表征和控制氧化还原状态的方法，到在远高于临界点的P-T条件下理解组分逸度的含义。 多机构合作将是这项研究的一个重要方面，因为要采用的最先进的实验和理论方法的多样性（没有一个或两个小组有足够的专业知识），因为这将允许不同实验室之间，不同实验方法之间以及理论和实验之间的结果进行重要的交叉检查。 ***

9710003 Stixrude The PIs will address two major geological questions using a combination of high-pressure experiments (both multi-anvil devices and laser-heated diamond cells) and first-principles quantum-mechanical calculations: 1) How does the redox state affect the relative stability of the major constituents of the mantle and core? and 2) How does the redox state effect the partitioning of geophysically and geochemically important elements among major mantle and core phases? Their objective is to develop new avenues of research regarding the Earth's redox state, ranging from the practical to the fundamental: for example, from developing means of characterizing and controlling redox state in experiments at ultrahigh pressures (P) and temperatures (T), to understanding the meaning of a component's fugacity at P-T conditions far above the critical point. Multi- institutional collaboration will be an important aspect of this research both because of the diversity of state-of-the-art experimental and theoretical methods to be employed (no one or two groups have sufficient expertise), and because this will allow significant cross-checks of the results between different laboratories, between different experimental methods, and between theory and experiment. ***