Determining the water dissociation constant from the relationship between water solubility in ringwoodite and oxygen fugacity

根据尖晶橄榄石的水溶性与氧逸度之间的关系确定水解离常数

基本信息

项目摘要

The recently discovered ringwoodite inclusion in a diamond was found to contain more than 1.4% water, which suggests that the mantle transition zone is hydrous, at least locally. An open question is whether the transition zone is water-rich globally or locally. Oxygen fugacity in the mantle transition zone is considered to be very low: just below the iron-wustite (IW) buffer. Thermodynamic investigation suggests that the fraction of water in fluids decreases with decreasing oxygen fugacity due to the dissociation of water into hydrogen and oxygen. This decrease in the water fraction in fluids should decrease the maximum water content in ringwoodite, and therefore the water-rich and highly reduced conditions could be incompatible. If the majority of the transition zone were under reduced conditions, the transition zone could not be water-rich, making the water-rich condition a local feature. In order to prove this hypothesis, we will determine the maximum water content in ringwoodite as a function of oxygen fugacity under transition-zone conditions.We will measure the maximum water content in ringwoodite in the following three systems: 1) Mg2SiO4 ringwoodite + H2O-H2 fluid, 2) Mg2SiO4 ringwoodite + diamond + H2O-CH4 fluid, and 3) ringwoodite with natural olivine composition + diamond + H2O-CH4. Hydration experiments will be conducted at a pressure of 19.5 GPa and a temperature of 1400 K using a large-volume multi-anvil press. A modified double-capsule technique will be adopted to equilibrate the sample, oxygen buffer, and fluid: the sample and water will be loaded in the inner capsule, and a buffer and water will be loaded between the inner and outer capsules. Eleven oxygen buffers of Pt-PtO2, Fe3O4-Fe2O3, Ni-NiO, Re-ReO2, FeO-Fe3O4, Mg2SiO4-MgSiO3-MgCO3-C, Mo-MoO2, Fe-Fe(x)O, Cr-Cr2O3, Si-SiO2, and Zr-ZrO2 will be used for the first system. Six buffers of Mg2SiO4-MgSiO3-MgCO3-C, Mo-MoO2, Fe-Fe(x)O, Cr-Cr2O3, Si-SiO2, and Zr-ZrO2 will be used for the second system. Five buffers of Fe-FexO, Mo-MoO2, Re-ReO2, Ni-NiO2, and FexO-Fe3O4 will be used for the third system. The water content in the transition zone will be investigated based on the relationship between water content and oxygen fugacity.
最近在一颗钻石中发现的林伍德石内含物中含有超过1.4%的水,这表明地幔过渡带至少在局部是含水的。一个悬而未决的问题是,过渡区是全球还是局部水资源丰富。地幔过渡带的氧逸度被认为是非常低的:就在铁-浮氏体(IW)缓冲层之下。热力学研究表明,流体中水的分数随着氧逸度的降低而降低,这是由于水分解成氢和氧。流体中水部分的这种降低应降低林伍德石中的最大水含量,因此富水和高度还原的条件可能是不相容的。如果过渡区的大部分处于还原条件下,则过渡区不可能是富水的,从而使富水条件成为局部特征。为了证明这一假设,我们将确定过渡带条件下林伍德石中的最大含水量作为氧逸度的函数。我们将在以下三个系统中测量林伍德石中的最大含水量:1)Mg_2SiO_4林伍德石+H_2 O-H_2流体,2)Mg_2SiO_4林伍德石+金刚石+H_2 O-CH_4流体,(3)天然橄榄石成分+金刚石+H_2 O-CH_4的林伍德石。水合实验将在19.5 GPa的压力和1400 K的温度下使用大体积多砧压机进行。将采用改良的双胶囊技术来平衡样品、氧气缓冲液和液体:样品和水将装载在内胶囊中,缓冲液和水将装载在内胶囊和外胶囊之间。第一个系统将使用Pt-PtO 2、Fe 3 O 4-Fe 2 O3、Ni-NiO、Re-ReO 2、FeO-Fe 3 O 4、Mg 2SiO 4-MgSiO 3-MgCO 3-C、Mo-MoO 2、Fe-Fe(x)O、Cr-Cr2 O3、Si-SiO2和Zr-ZrO 2十一种氧缓冲剂。第二个系统将使用Mg 2SiO 4-MgSiO 3-MgCO 3-C、Mo-MoO 2、Fe-Fe(x)O、Cr-Cr2 O3、Si-SiO2和Zr-ZrO 2六种缓冲剂。第三个系统将使用Fe-FexO、Mo-MoO 2、Re-ReO 2、Ni-NiO 2和FexO-Fe 3 O 4五种缓冲液。根据水含量与氧逸度之间的关系,研究过渡区的水含量。

项目成果

期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Independent hydrogen incorporation in wadsleyite from oxygen fugacity and non-dissociation of H2O in the reducing mantle transition zone
  • DOI:
    10.1016/j.epsl.2021.116755
  • 发表时间:
    2021-03
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    D. Druzhbin;H. Fei;T. Katsura
  • 通讯作者:
    D. Druzhbin;H. Fei;T. Katsura
Water Solubility in Fe‐Bearing Wadsleyite at Mantle Transition Zone Temperatures
  • DOI:
    10.1029/2021gl092836
  • 发表时间:
    2021-04
  • 期刊:
  • 影响因子:
    5.2
  • 作者:
    H. Fei;T. Katsura
  • 通讯作者:
    H. Fei;T. Katsura
Pressure Dependence of Proton Incorporation and Water Solubility in Olivine
High water solubility of ringwoodite at mantle transition zone temperature
  • DOI:
    10.1016/j.epsl.2019.115987
  • 发表时间:
    2020-02-01
  • 期刊:
  • 影响因子:
    5.3
  • 作者:
    Fei, Hongzhan;Katsura, Tomoo
  • 通讯作者:
    Katsura, Tomoo
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Professor Dr. Tomoo Katsura其他文献

Professor Dr. Tomoo Katsura的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Professor Dr. Tomoo Katsura', 18)}}的其他基金

Evaluation of the aspect ratio of ferropericlase under lower-mantle conditions
下地幔条件下方镁石长径比的评估
  • 批准号:
    449701262
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Determination of water partition coefficients between upper mantle minerals and melts as a function of pressure, temperature, and CO2 content using a rapid quench cell in multi-anvil experiments
在多砧实验中使用快速淬火室确定上地幔矿物和熔体之间的水分配系数作为压力、温度和 CO2 含量的函数
  • 批准号:
    402695659
  • 财政年份:
    2018
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Measurement of Si grain-boundary diffusion coefficients of forsterite as a function of water content: Estimation of the degree of creep enhancement with water within different regions of the upper mantle
镁橄榄石硅晶界扩散系数随含水量变化的测量:估计上地幔不同区域内水的蠕变增强程度
  • 批准号:
    247132310
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Determination of the three phase region of the post-spinel transition in (Mg,Fe)2SiO4: explanation of the extreme sharpness of the 660-km discontinuity and implication for chemical structure and dynamics of the deep mantle
(Mg,Fe)2SiO4 后尖晶石相变三相区的确定:解释 660 公里不连续性的极端锐度及其对深部地幔化学结构和动力学的影响
  • 批准号:
    257122795
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Measurement of Si self-diffusion coefficients of wadsleyite as a function of water content
硅锰矿硅自扩散系数随含水量变化的测量
  • 批准号:
    251472533
  • 财政年份:
    2014
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Dislocation recovery experiment of hydrous olivine as a function of water content and crystallographic orientation
水合橄榄石的位错恢复实验作为含水量和晶体取向的函数
  • 批准号:
    229061489
  • 财政年份:
    2012
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Accurate determination of the melting relations of primitive peridotite under lower-mantle conditions up to 35 GPa using advanced multi-anvil techniques
利用先进的多砧技术准确测定高达 35 GPa 的下地幔条件下原始橄榄岩的熔化关系
  • 批准号:
    461495683
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Grants
H2O solubilities in Al-free and Al-bearing high-pressure silica polymorphs as a function of pressure and temperature: H2O storage in the lower mantle
无铝和含铝高压二氧化硅多晶型物中的水溶解度与压力和温度的函数关系:下地幔中的水储存
  • 批准号:
    518398967
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Grants

相似国自然基金

一次扫描多对比度及free-water DTI技术在功能区脑肿瘤中的研究
  • 批准号:
    JCZRLH202500011
  • 批准年份:
    2025
  • 资助金额:
    0.0 万元
  • 项目类别:
    省市级项目
光响应水凝胶微球在“On water”反应界面调节机制的研究
  • 批准号:
  • 批准年份:
    2022
  • 资助金额:
    30 万元
  • 项目类别:
    青年科学基金项目
Na1+xMxTi2-x(PO4)3/MXene复合微卷构筑及其在Water-in-Salt复合电解液中储钠机制研究
  • 批准号:
  • 批准年份:
    2020
  • 资助金额:
    58 万元
  • 项目类别:
    面上项目
不同拓扑结构的水溶性共轭聚合物分子刷的合成及生物应用研究
  • 批准号:
    51173080
  • 批准年份:
    2011
  • 资助金额:
    60.0 万元
  • 项目类别:
    面上项目
水溶性含铱配合物的刚柔嵌段共轭聚合物的合成及其生物传感应用
  • 批准号:
    21104033
  • 批准年份:
    2011
  • 资助金额:
    25.0 万元
  • 项目类别:
    青年科学基金项目

相似海外基金

Processivity and Catalytic Mechanism of Aldosterone Synthase
醛固酮合酶的持续合成能力和催化机制
  • 批准号:
    10600520
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Photo-Fragmentation Methods for Single-Molecule Protein Sequencing by Nanopore Mass Spectrometry
纳米孔质谱单分子蛋白质测序的光断裂方法
  • 批准号:
    10644378
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Native Mass Spectrometry Guided Structural Biology Center
天然质谱引导结构生物学中心
  • 批准号:
    10629935
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Enhancing Drug Discovery Research by Free Energy Modeling
通过自由能建模加强药物发现研究
  • 批准号:
    10730788
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
MRI biomarkers of glial-specific metabolites and microstructure in aging
衰老过程中神经胶质特异性代谢物和微观结构的 MRI 生物标志物
  • 批准号:
    10742593
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Metallo-fluorocarbon nanoemulsion for PET detection of cancer inflammation
金属氟碳纳米乳用于PET检测癌症炎症
  • 批准号:
    10737153
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Combining electron and nuclear magnetic resonance to track Alzheimer's amyloid-beta oligomer-to-fibril conversion
结合电子和核磁共振来追踪阿尔茨海默病β淀粉样蛋白寡聚物到原纤维的转化
  • 批准号:
    10662904
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Determinants of amino acid transporter oligomerization in membranes
膜中氨基酸转运蛋白寡聚的决定因素
  • 批准号:
    10725968
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
Improving Fragment Based Drug Discovery and the Development of Tools for Chemical Biology through Nanoscale Encapsulation and NMR Spectroscopy
通过纳米级封装和核磁共振波谱改善基于片段的药物发现和化学生物学工具的开发
  • 批准号:
    10419416
  • 财政年份:
    2022
  • 资助金额:
    --
  • 项目类别:
Mechanisms of oxygen off-loading from red blood cells in murine models of human disease
人类疾病小鼠模型中红细胞的氧卸载机制
  • 批准号:
    10343967
  • 财政年份:
    2022
  • 资助金额:
    --
  • 项目类别:
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了