CSEDI: Compositional heterogeneity and seismic anisotropy near the 410 km discontinuity
CSEDI:410公里间断面附近的成分异质性和地震各向异性
基本信息
- 批准号:1664471
- 负责人:
- 金额:$ 36.99万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2017
- 资助国家:美国
- 起止时间:2017-07-01 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The mantle is the largest compositional layer within Earth and it is continually mixed by thermal convection associated with the movement, creation, and destruction of tectonic plates. It is clear from volcanic rocks that this mixing has not resulted in a homogeneous mantle composition, however, there are few observational constraints that allow mapping of the compositional variations within Earth's mantle. This project seeks to measure the range of compositional variations in the mantle and map their spatial distribution across the globe. The focus will be variations in the fraction of the mineral olivine because it is the most abundant mantle mineral and variations in its local abundance change the properties of a seismically reflective boundary at about 400 km depth. The interface represents a change in the crystal structure of olivine, which transforms to wadsleyite as pressure and temperature increase with depth. Laboratory mineral physics experiments to determine the seismic properties of olivine and wadsleyite will be combined with analyses of seismic data from dense regional arrays to infer compositional variations. In addition to estimating the fraction of olivine, the project will also estimate the abundance of hydrogen defects in olivine, which represent a potential geochemical reservoir of water in the deep Earth. The combined studies will provide novel insights into global mantle mixing and spatial variations in the ability of the mantle to generate volcanic activity. Grant funding will primarily be used to support research training and education of student scientists using modern mineral physics and seismic methods.This project will take advantage of the petrological simplicity of the 410 km discontinuity, which is the boundary between the upper mantle and the transition zone, to investigate spatial variations in the bulk and volatile composition of the mantle. The olivine-wadsleyite transition is the only phase transition that can cause the globally observed 410. Wadsleyite has about five times greater water storage capacity than olivine and the existence of structural water can profoundly affect sound velocities of minerals. Therefore the magnitude of the 410 provides a good estimation of the olivine content and water concentration near 410 km depth in the Earth's interior. High olivine content in the source rock results in less capability of producing magma, thus olivine content is a good indicator of mantle petrology. In addition, olivine is also strongly anisotropic relative to wadsleyite, so depending on the olivine content and strain-induced lattice-preferred orientation of olivine polymorphs, the 410 can be a sharp anisotropic boundary as well. The investigators will also use broadband P to SV/SH scattering signals collected by a global compilation of dense regional seismic arrays to better assess the isotropic/ anisotropic seismic structures near the 410. The results will be compared with new laboratory single-crystal high pressure-temperature sound velocity measurements. The ultimate goal of the proposed study is to estimate the lateral compositional variations in terms of olivine content and water concentration near 410 km depth, and the anisotropic velocity jumps across the 410 discontinuity. The majority of project funding will support an interdisciplinary team of students supervised by two early career PIs. This project will create unique opportunities for graduate and undergraduate students, especially underrepresented minority students, to participate in scientific research both on campus and at the state-of-the-art synchrotron facilities.
地幔是地球上最大的组成层,它通过与构造板块的运动、创造和破坏相关的热对流不断混合。从火山岩中可以清楚地看出,这种混合并没有导致均匀的地幔组成,然而,很少有观测限制可以绘制地球地幔内成分变化的地图。该项目旨在测量地幔成分变化的范围,并绘制其在全球的空间分布。重点将是矿物橄榄石的变化,因为橄榄石是最丰富的地幔矿物,其局部丰度的变化改变了约400公里深度的地震反射边界的性质。界面代表了橄榄石晶体结构的变化,随着深度的增加,压力和温度的升高,橄榄石转变为沃德斯莱石。确定橄榄石和瓦德斯莱岩地震特性的实验室矿物物理实验将与密集区域阵列的地震数据分析相结合,以推断成分变化。除了估算橄榄石的含量外,该项目还将估算橄榄石中氢缺陷的丰度,这代表了地球深部潜在的地球化学水储集层。这些综合研究将为全球地幔混合和地幔产生火山活动能力的空间变化提供新的见解。赠款资金将主要用于支持使用现代矿物物理学和地震方法的学生科学家的研究、培训和教育。该项目将利用410公里不连续带(上地幔与过渡带之间的边界)的岩石学简单性,研究地幔体积和挥发性成分的空间变化。橄榄石-瓦德斯莱石转变是唯一能引起全球观测到的410的相变。Wadsleyite的储水能力是橄榄石的五倍,结构水的存在可以深刻地影响矿物的声速。因此,410的震级可以很好地估计地球内部410公里深度附近的橄榄石含量和水浓度。烃源岩中橄榄石含量越高,岩浆生成能力越弱,因此橄榄石含量是幔岩学的良好指标。此外,橄榄石相对于wadsleyite也具有很强的各向异性,因此根据橄榄石含量和应变诱导的橄榄石多晶的晶格优先取向,410也可以是一个明显的各向异性边界。研究人员还将使用全球密集区域地震阵列收集的宽带P到SV/SH散射信号,以更好地评估410附近的各向同性/各向异性地震结构。结果将与新的实验室单晶高压-高温声速测量结果进行比较。该研究的最终目标是估算410 km深度附近橄榄石含量和水浓度的横向成分变化,以及410不连续层的各向异性速度跳变。大部分项目资金将支持由两名早期职业导师指导的跨学科学生团队。该项目将为研究生和本科生,特别是少数族裔学生创造独特的机会,让他们在校园和最先进的同步加速器设施中参与科学研究。
项目成果
期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The Water-Fe-Pressure dependent single-crystal elastic properties of wadsleyite: Implications for the seismic anisotropy in the upper Mantle Transition Zone
瓦兹利石的水-铁-压力依赖性单晶弹性特性:对上地幔过渡带地震各向异性的影响
- DOI:10.1016/j.epsl.2021.116955
- 发表时间:2021
- 期刊:
- 影响因子:5.3
- 作者:Zhou, Wen-Yi;Ren, Zhiyuan;Zhang, Jin S.;Chen, Bin;Hao, Ming;Ohuchi, Tomohiro;Miyagi, Lowell;Zhang, Dongzhou;Alp, Esen E.;Lavina, Barbara
- 通讯作者:Lavina, Barbara
The Elastic Anisotropy Change Near the 410‐km Discontinuity: Predictions From Single‐Crystal Elasticity Measurements of Olivine and Wadsleyite
- DOI:10.1002/2017jb015339
- 发表时间:2018-04
- 期刊:
- 影响因子:0
- 作者:Jin S. Zhang;J. Bass;B. Schmandt
- 通讯作者:Jin S. Zhang;J. Bass;B. Schmandt
A Single 520 km Discontinuity Beneath the Contiguous United States With Pyrolitic Seismic Properties
美国本土下方 520 公里的单一不连续面具有热解地震特性
- DOI:10.1029/2022gl101300
- 发表时间:2022
- 期刊:
- 影响因子:5.2
- 作者:Zhang, Han;Schmandt, Brandon;Zhou, Wen‐Yi;Zhang, Jin S.;Maguire, Ross
- 通讯作者:Maguire, Ross
Localized Anisotropy in the Mantle Transition Zone Due to Flow Through Slab Gaps
- DOI:10.1029/2021gl092712
- 发表时间:2021-02
- 期刊:
- 影响因子:5.2
- 作者:Han Zhang;B. Schmandt;Jin S. Zhang
- 通讯作者:Han Zhang;B. Schmandt;Jin S. Zhang
High pressure-temperature single-crystal elasticity of ringwoodite: Implications for detecting the 520 discontinuity and metastable ringwoodite at depths greater than 660 km
- DOI:10.1016/j.epsl.2021.117359
- 发表时间:2022-02
- 期刊:
- 影响因子:5.3
- 作者:Wencai Zhou;Jin S. Zhang;Quancheng Huang;X. Lai;Bin Chen;P. Dera;B. Schmandt
- 通讯作者:Wencai Zhou;Jin S. Zhang;Quancheng Huang;X. Lai;Bin Chen;P. Dera;B. Schmandt
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Jin Zhang其他文献
Studies of Cubosomes as a Sustained Drug Delivery System
立方体作为持续药物输送系统的研究
- DOI:
- 发表时间:
2005 - 期刊:
- 影响因子:0
- 作者:
Xue Zhao;Jin Zhang;L. Zheng;Dong Li - 通讯作者:
Dong Li
Note on the evaluation of one type scalar one loop three-point amplitude inspired by $H\rightarrow gg$ decay in the standard model
关于受标准模型中 $H
ightarrow gg$ 衰减启发的一型标量一环三点振幅评估的注释
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
Jin Zhang - 通讯作者:
Jin Zhang
Detection of abnormal behavior in narrow scene with perspective distortion
检测具有透视变形的狭窄场景中的异常行为
- DOI:
10.1007/s00138-018-0970-7 - 发表时间:
2018-08 - 期刊:
- 影响因子:3.3
- 作者:
Jin Zhang;Cheng Wu - 通讯作者:
Cheng Wu
Adaptive event-triggering H∞ load frequency control for network-based power systems
基于网络的电力系统的自适应事件触发 H 负载频率控制
- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:7.7
- 作者:
Chen Peng;Jin Zhang;Huaicheng Yan - 通讯作者:
Huaicheng Yan
Functional analysis of a de novo mutation c.1692 del A of the PHEX gene in a Chinese family with X-linked hypophosphataemic rickets
X连锁低磷血症性佝偻病中国家系PHEX基因c.1692 del A新突变的功能分析
- DOI:
- 发表时间:
2019 - 期刊:
- 影响因子:4.6
- 作者:
Jianbo Huang;Xiaogang Bao;Wenjun Xia;Lingjun Zhu;Jin Zhang;Jing Ma;Nan Jiang;Jichun Yang;Qing Chen;Tianrui Jing;Jia Liu;Duan Ma;Guohua Xu - 通讯作者:
Guohua Xu
Jin Zhang的其他文献
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{{ truncateString('Jin Zhang', 18)}}的其他基金
Collaborative Research: Probing and Controlling Exciton-Plasmon Interaction for Solar Hydrogen Generation
合作研究:探测和控制太阳能制氢的激子-等离子体激元相互作用
- 批准号:
2230729 - 财政年份:2023
- 资助金额:
$ 36.99万 - 项目类别:
Continuing Grant
Lower mantle seismic anisotropy and heterogeneities - insight from the thermoelastic properties of CaSiO3 perovskite
下地幔地震各向异性和异质性——从 CaSiO3 钙钛矿热弹性性质的洞察
- 批准号:
2240506 - 财政年份:2023
- 资助金额:
$ 36.99万 - 项目类别:
Continuing Grant
CAREER: Upper mantle anisotropy: the effect of pressure, temperature and hydration
职业:上地幔各向异性:压力、温度和水合作用的影响
- 批准号:
2243184 - 财政年份:2022
- 资助金额:
$ 36.99万 - 项目类别:
Continuing Grant
Chemical Control of Spin and Carrier Dynamics in 2D Hybrid Metal Halide Double Perovskites
二维杂化金属卤化物双钙钛矿中自旋和载流子动力学的化学控制
- 批准号:
2203633 - 财政年份:2022
- 资助金额:
$ 36.99万 - 项目类别:
Standard Grant
CAREER: Upper mantle anisotropy: the effect of pressure, temperature and hydration
职业:上地幔各向异性:压力、温度和水合作用的影响
- 批准号:
1847707 - 财政年份:2019
- 资助金额:
$ 36.99万 - 项目类别:
Continuing Grant
Understanding and Enhancing Electronic Coupling Between Metal Halide Perovskite Quantum Dots Through Surface Molecular Engineering
通过表面分子工程了解和增强金属卤化物钙钛矿量子点之间的电子耦合
- 批准号:
1904547 - 财政年份:2019
- 资助金额:
$ 36.99万 - 项目类别:
Standard Grant
I-Corps: Hollow Metal Nanoparticles: Improving the Sensitivity of Lateral Flow Assays
I-Corps:空心金属纳米颗粒:提高侧向层析检测的灵敏度
- 批准号:
1906711 - 财政年份:2018
- 资助金额:
$ 36.99万 - 项目类别:
Standard Grant
Elasticity of clinopyroxene (Ca, Na) (Mg, Al, Fe) Si2O6 under Earth's upper mantle conditions
地球上地幔条件下单斜辉石(Ca,Na)(Mg,Al,Fe)Si2O6的弹性
- 批准号:
1646527 - 财政年份:2017
- 资助金额:
$ 36.99万 - 项目类别:
Standard Grant
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合作研究:与地球动力学过程和成分不均匀性相关的中地幔反射体的地震成像
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- 批准号:
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Collaborative Research Centres
CSEDI: Structure and Dynamics of Large-Scale Lower Mantle Compositional Heterogeneity
CSEDI:大规模下地幔成分异质性的结构和动力学
- 批准号:
1161038 - 财政年份:2012
- 资助金额:
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Collaborative Research: Effects of Structural and Compositional Heterogeneity on Upper Mantle Deformation and Rheology
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1050041 - 财政年份:2011
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EAR-PF: Dynamics and melting of the upper mantle: Relating the length scales of compositional heterogeneity in the crust and mantle
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