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

9710475海姆利，PI将结合高压实验(多顶锤装置和激光加热的钻石电池)和第一原理量子力学计算来解决两个主要的地质学问题：1)氧化还原状态如何影响地幔和地核主要成分的相对稳定性？2)氧化还原状态如何影响地球物理和地球化学重要元素在主地幔和核相之间的分配？他们的目标是开发有关地球氧化还原状态的新研究途径，从实用到基本：例如，从开发在超高压(P)和温度(T)下的实验中表征和控制氧化还原状态的方法，到理解在P-T条件下远远高于临界点的组分逸度的含义。多机构合作将是这项研究的一个重要方面，这既是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拥有足够的专业知识)，也是因为这将允许在不同的实验室之间、在不同的实验方法之间以及在理论和实验之间对结果进行重大的交叉检查。***

9710475 Hemley 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. ***