CSEDI Collaborative Research: Experimental Constraints on the Chemistry and Evolution of Earth's Core
CSEDI合作研究:地核化学和演化的实验约束
基本信息
- 批准号:0600140
- 负责人:
- 金额:$ 9.21万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2005
- 资助国家:美国
- 起止时间:2005-07-01 至 2007-10-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The chemistry of iron-rich hexagonal close packed (hcp) alloy, and its role in the elemental and isotopic composition, convection, and evolution of the Earth's core, will be studied. The composition of coexisting iron-rich hcp-alloys and melt will be determined at pressures to 25 GPa. The hcp structure of the metal will be stabilized by alloying Fe with a small amount of Os or Ru; this phase is widely thought to be directly relevant to the Earth's core but has been inaccessible in previous experimental studies of chemical partitioning. Data on trace element partitioning between Fe-rich hcp alloy and melt at high pressures will provide insight into the distribution of siderophile elements that act as important radioisotope geochronometers, and will place needed experimental constraints on models of Earth evolution that involve isotopic signatures to be carried from the outer core to the surface. The partitioning of major elements such as Ni, S, and O between Fe-rich hcp alloy and melt will be used to constrain the compositions of the solid inner and liquid outer core, and will improve our understanding of the driving mechanism for compositional convection in the core. The proposed research will be the first application in which Fe is alloyed specifically to stabilize the hcp phase at more amenable pressures and temperatures, and it may stimulate further experimental investigations into the physical and chemical character of hcp-Fe. Additionally, this work will demonstrate a combination of high-pressure experimental and trace element analytical techniques, and should stimulate its broader application in the geosciences. Results from the proposed study will be disseminated primarily through publication in the scientific literature, by participation at scientific conferences, and when warranted, through wider-reaching news outlets.
将研究富铁六方密排(HCP)合金的化学,以及它在元素和同位素组成、对流和地核演化中的作用。共存的富铁HCP合金和熔体的组成将在25 Gpa的压力下确定。通过将铁与少量的Os或Ru合金化,金属的HCP结构将得到稳定;这一相被广泛认为与地核直接相关,但在以前的化学分配实验研究中一直无法获得。关于高压下富铁六氯磷合金和熔体之间痕量元素分配的数据将有助于深入了解作为重要放射性同位素地质计时器的亲铁元素的分布,并将对涉及从外核到地表携带同位素特征的地球演化模型施加必要的实验限制。利用Ni、S、O等常量元素在富铁HCP合金和熔体之间的分配来约束固体内核和液态内核的成分,将加深我们对内核成分对流驱动机制的理解。这项拟议的研究将是首次将Fe合金化以在更灵活的压力和温度下稳定HCP相,并可能促进对HCP-Fe的物理和化学性质的进一步实验研究。此外,这项工作将展示高压实验和微量元素分析技术的组合,并应促进其在地球科学中的更广泛应用。拟议研究的结果将主要通过在科学文献上发表、参加科学会议以及在必要时通过更广泛的新闻机构传播。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Andrew Campbell其他文献
HOW EMOTIONAL TAGGING CAN PUSH LEADERS TO MAKE BAD DECISIONS by
情绪标签如何促使领导者做出错误的决定
- DOI:
- 发表时间:
2009 - 期刊:
- 影响因子:0
- 作者:
S. Finkelstein;J. Whitehead;Andrew Campbell - 通讯作者:
Andrew Campbell
Cancerous seeding of the tracheotomy site in patients with upper aerodigestive tract squamous cell carcinoma
- DOI:
10.1016/s0194-5998(96)80999-5 - 发表时间:
1996-08-01 - 期刊:
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- 作者:
Andrew Campbell;Lyon L. Gleich;William Barrett;Jack L. Gluckman - 通讯作者:
Jack L. Gluckman
The timing of extubation in secundum-type asd repairs in children
- DOI:
10.1007/bf03016930 - 发表时间:
2006-06-01 - 期刊:
- 影响因子:3.300
- 作者:
Nigel Barker;J Mark Ansermino;Andrew Campbell;Richard Lee - 通讯作者:
Richard Lee
Recommendations for the Design and Implementation of Virtual Reality for Acquired Brain Injury Rehabilitation: Systematic Review (Preprint)
后天性脑损伤康复虚拟现实的设计和实施建议:系统评价(预印本)
- DOI:
- 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
Sophie Brassel;E. Power;Andrew Campbell;Melissa Brunner;L. Togher - 通讯作者:
L. Togher
Co-insurance and moral hazard: Some reflections on deposit protection in the UK and USA
- DOI:
10.1057/palgrave.jbr.2340154 - 发表时间:
2003-09-01 - 期刊:
- 影响因子:1.500
- 作者:
Peter Cartwright;Andrew Campbell - 通讯作者:
Andrew Campbell
Andrew Campbell的其他文献
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{{ truncateString('Andrew Campbell', 18)}}的其他基金
SEES: Community Driven Management of Synchrotron Facilities for Earth and Environmental Science
SEES:地球与环境科学同步加速器设施的社区驱动管理
- 批准号:
2223273 - 财政年份:2023
- 资助金额:
$ 9.21万 - 项目类别:
Cooperative Agreement
Melting Studies of Core-forming Alloys
成芯合金的熔化研究
- 批准号:
1651017 - 财政年份:2017
- 资助金额:
$ 9.21万 - 项目类别:
Continuing Grant
Graduate Research Fellowship Program (GRFP)
研究生研究奖学金计划(GRFP)
- 批准号:
1644760 - 财政年份:2016
- 资助金额:
$ 9.21万 - 项目类别:
Fellowship Award
X-ray Scattering Experiments on Melting and Equations of State of Candidate Compositions of Earth's Core
地核候选成分熔化的X射线散射实验和状态方程
- 批准号:
1427123 - 财政年份:2014
- 资助金额:
$ 9.21万 - 项目类别:
Standard Grant
CAREER: High Pressure Melting and Phase Transitions in Model Compositions of Earth's Core
职业:地核模型成分中的高压熔化和相变
- 批准号:
1243847 - 财政年份:2012
- 资助金额:
$ 9.21万 - 项目类别:
Continuing Grant
NSF East Asia and Pacific Summer Institute for FY 2012 in China
NSF 东亚及太平洋地区 2012 财年中国暑期研修班
- 批准号:
1210034 - 财政年份:2012
- 资助金额:
$ 9.21万 - 项目类别:
Fellowship Award
EAGER: Brain-Mobile Interfaces: Exploratory Research into the Development of Networked NeuroPhones
EAGER:大脑移动接口:网络神经电话开发的探索性研究
- 批准号:
1058753 - 财政年份:2010
- 资助金额:
$ 9.21万 - 项目类别:
Standard Grant
CAREER: High Pressure Melting and Phase Transitions in Model Compositions of Earth's Core
职业:地核模型成分中的高压熔化和相变
- 批准号:
0847217 - 财政年份:2009
- 资助金额:
$ 9.21万 - 项目类别:
Continuing Grant
High Pressure-Temperature Equations of State, Oxygen Fugacity, and Earth's Core
高压-温度状态方程、氧逸度和地核
- 批准号:
0635722 - 财政年份:2006
- 资助金额:
$ 9.21万 - 项目类别:
Standard Grant
NeTS-ProWiN - Collaborative Research: Dynamic Spectrum MAC with Multiparty Support in Adhoc Networks
NeTS-ProWiN - 协作研究:自组织网络中具有多方支持的动态频谱 MAC
- 批准号:
0631289 - 财政年份:2005
- 资助金额:
$ 9.21万 - 项目类别:
Standard Grant
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