Quantifying Rare Earth (REE) and High Field Strength (HFSE) Element Mobility in Fluids at Conditions Appropriate for Forearc to Subarc Cold and Hot Subduction Zones

在适合弧前至弧下冷俯冲带和热俯冲带的条件下量化流体中稀土 (REE) 和高场强 (HFSE) 元素的迁移率

基本信息

项目摘要

Intellectual Merit: Ocean lithosphere and overlying sediments undergo metamorphic dehydration as these materials are subducted (i.e., increasing pressure and temperature). This process has been hypothesized to account for distinctive geochemical signatures in arc magmas as opposed to those from mid-ocean ridges (MORB) and ocean islands (OIB). The underlying process involves the ability of exsolved fluids to selectively fractionate elements during fluid-rock reactions. The fluid is proposed to enrich arc magmas in the large ion lithophile elements (LILE: K, Rb, Cs, Sr, Ba) relative to high field strength elements (HFSE: Nb, Zr, Ta, Hf, Ti), as well as enriching the magmas in light-REE (LREE) relative to the middle- and heavy-REE (MREE, HREE). At present, data needed to quantify such processes are mostly available for pure or dilute aqueous solutions and cover a relatively small area in the P-T space wherein prograde metamorphic dehydration occurs in the forearc and subarc environments. Experimental studies are proposed to expand significantly our knowledge of the behavior of the REE and HFSE in aqueous fluid as a function of fluid chemistry, pressure and temperature at subduction zone conditions. For example, the partitioning of Nb between rutile and fluid, La and Ce between monazite and fluid, and Y between xenotime and fluid will be determined for a range of fluid bulk compositions, including H2O-NaCl and H2O-NaF systems, with quartz used to ensure the fluid contains sufficient Si relative to that expected in nature. This work will thus allow assessment of the effects of dissolved Cl, F and Si on trace element solubilities in realistic aqueous fluids. Two complementary experimental techniques will be used: 1) a hydrothermal diamond anvil cell (HDAC) at 1 - 3 GPa and 300-600°C, wherein Nb, La, Ce and Y concentrations will be measured in situ by using synchrotron X-ray fluorescence (SXRF); and 2) a piston-cylinder apparatus at 1 and 1.8 GPa and 700-900°C, wherein trace element concentrations in fluid will be measured by using the mass-loss technique combined with LA-ICP-MS analysis of recovered crystals to assess the nature of congruent dissolution of the solid phases. Successful development and calibration of the experimental technique was demonstrated (and described in this proposal) by measuring xenotime solubility, hence Y abundance, in a HCl-H2O fluid to 5 GPa. New results will add significantly to the limited mineral-fluid partitioning data base over pressure-temperature regime of interest, and allow geologists to model more accurately the effects of fluid-present metamorphism and magmatism in the subduction zone environment. Broader Impacts: This project involves collaboration between three UNLV faculty members who combine their expertise to mentor one female PhD student, Ms. Elizabeth Tanis, and at least two UNLV undergraduate students per year. The PhD student is already working on this project and has presented data at two AGU meetings as well as one submitted manuscript that is accepted pending revision. All students will be trained in cutting-edge synchrotron-based experimental techniques, piston-cylinder mass loss experiments, analytical chemistry and interpretation of geochemical data sets, and, importantly, will develop research relationships with a diverse group of scientists through collaboration with faculty at UNLV, Memorial University of Newfoundland and beamline scientists at the Advanced Photon Source. The PIs participate regularly in community outreach, presenting lectures and hands-on geology demonstrations to K-12 students. Simon and Burnley regularly visit K-12 classes, and Simon is the Geoscience member of a UNLV-Clark County School District "summer institute" that brings 60 K-5 teachers to UNLV each summer for intensive science-curriculum education as well as the Geoscience content mentor for the Clark Magnate High School science Olympiad team in 2011-2012. Results will be incorporated directly into courses taught by the PIs, and results will presented at appropriate science meetings and published in peer-reviewed journals.
智力优点:海洋岩石圈和上覆沉积物随着这些物质的俯冲(即压力和温度升高)而发生变质脱水,这一过程已被用来解释弧岩浆中与洋中脊(MORB)不同的地球化学特征。 )和海洋岛屿(OIB)的基本过程涉及在流体-岩石反应期间溶解的流体选择性分馏元素的能力。岩浆中的大离子亲石元素(LILE:K、Rb、Cs、Sr、Ba)相对于高场强元素(HFSE:Nb、Zr、Ta、Hf、Ti),以及富集岩浆中的轻稀土元素(LREE) 相对于中重稀土元素 (MREE、HREE) 目前,量化此类过程所需的数据大多适用于纯水溶液或稀水溶液,并且覆盖 P-T 中相对较小的区域。因此,在弧前和弧下环境中会发生渐进变质脱水,以显着扩展我们对含水流体中 REE 和 HFSE 行为的了解,例如俯冲带条件下的流体化学、压力和温度。 ,Nb 在金红石和流体之间的分配,La 和 Ce 在独居石和流体之间的分配,以及 Y 在磷钇矿和流体之间的分配将针对一系列流体本体成分(包括 H2O-NaCl)进行确定和 H2O-NaF 系统,使用石英确保流体含有相对于自然界中预期的 Si,因此这项工作将允许评估溶解的足够的 Cl、F 和 Si 对现实水性流体中微量元素溶解度的影响。将使用的实验技术:1) 1 - 3 GPa 和 300-600°C 下的热液金刚石砧室 (HDAC),其中 Nb、La、Ce 和 Y 浓度将在原位测量通过使用同步加速器X射线荧光(SXRF);2)在1和1.8 GPa和700-900°C下的活塞缸装置,从而使用质量损失技术结合LA来测量流体中的微量元素浓度。 -通过测量磷钇矿溶解度,对回收的晶体进行ICP-MS分析,以评估固相同成分溶解的性质,从而证明了实验技术的成功开发和校准(并在本提案中进行了描述)。因此,HCl-H2O 流体中的 Y 丰度可达 5 GPa。新结果将显着增加感兴趣的压力-温度范围内的有限矿物流体分配数据库,并使地质学家能够更准确地模拟流体存在的变质作用的影响。更广泛的影响:该项目涉及三名 UNLV 教员之间的合作,他们每年结合自己的专业知识指导一名女博士生 Elizabeth Tanis 女士和至少两名 UNLV 本科生。博士生已经在研究这个项目,并在两次 AGU 会议上提交了数据,并提交了一份待修订的手稿。所有学生都将接受基于同步加速器的尖端实验技术、活塞缸质量损失实验、分析化学和地球化学数据集的解释,更重要的是,将通过与内华达大学拉斯维加斯分校、纽芬兰纪念大学的教师和先进光子源的光束线科学家的合作,与不同的科学家群体建立研究关系。 PI 定期参与社区外展活动。 ,发表讲座和Simon 和 Burnley 定期为 K-12 学生进行地质学演示,Simon 是 UNLV-Clark 县学区“暑期学院”的地球科学成员,每年夏天该学院都会为 UNLV 带来 60 名 K-5 教师强化科学课程教育以及 2011-2012 年克拉克麦格纳特高中科学奥林匹克团队的地球科学内容导师 结果将直接纳入由该校教授的课程中。 PI 和结果将在适当的科学会议上提出,并在同行评审的期刊上发表。

项目成果

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Adam Simon其他文献

Kinetic and Mechanistic Investigations to Enable a Key Suzuki Coupling for Sotorasib Manufacture─What a Difference a Base Makes
动力学和机械研究使铃木关键联轴器能够用于 Sotorasib 制造 — 底座有何不同
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    James I. Murray;Liang Zhang;Adam Simon;M. S. Silva Elipe;Carolyn S. Wei;Seb Caille;A. T. Parsons
  • 通讯作者:
    A. T. Parsons
Cassiterite dissolution and Sn diffusion in silicate melts of variable water content
不同含水量硅酸盐熔体中的锡石溶解和锡扩散
  • DOI:
    10.1016/j.chemgeo.2016.07.021
  • 发表时间:
    2016-11
  • 期刊:
  • 影响因子:
    3.9
  • 作者:
    Yang Yuping;Zhang Youxue;Adam Simon;Ni Peng
  • 通讯作者:
    Ni Peng

Adam Simon的其他文献

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{{ truncateString('Adam Simon', 18)}}的其他基金

Collaborative Research: Testing endmember hypotheses for the source of mineralizing fluid(s) in iron oxide - copper - gold (IOCG) deposits
合作研究:测试氧化铁-铜-金 (IOCG) 矿床中矿化流体来源的端元假设
  • 批准号:
    2233425
  • 财政年份:
    2023
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
Reconstructing the Magmatic and Hydrothermal Evolution of the Au-rich, Cu-Poor Dorado Porphyry Deposit, Chile: Implications for Cu/Au Ratios in Porphyry Deposits Worldwide
重建智利富金、贫铜多拉多斑岩矿床的岩浆和热液演化:对全球斑岩矿床中铜/金比率的影响
  • 批准号:
    2214119
  • 财政年份:
    2022
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
Collaborative Research: Testing the hypothesis that iron oxide - copper - gold (IOCG) deposits and iron oxide - apatite (IOA) deposits evolve as parts of the same mineral system
合作研究:检验氧化铁-铜-金(IOCG)矿床和氧化铁-磷灰石(IOA)矿床作为同一矿物系统的一部分演化的假设
  • 批准号:
    1924142
  • 财政年份:
    2019
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
2018 Geochemistry of Minerals GRC/GRS: Waterville Valley, NH, August 4-5, 2018
2018 年矿物地球化学 GRC/GRS:新罕布什尔州沃特维尔谷,2018 年 8 月 4-5 日
  • 批准号:
    1836944
  • 财政年份:
    2018
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
2016 Geochemistry of Mineral Deposits GRC
2016年矿床地球化学GRC
  • 批准号:
    1641040
  • 财政年份:
    2016
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
Sulfur Isotope Fractionation and Sulfur Partitioning between Apatite and Silicate Melts
磷灰石和硅酸盐熔体之间的硫同位素分馏和硫分配
  • 批准号:
    1524394
  • 财政年份:
    2015
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Continuing Grant
Collaborative Research: The Behavior of Sulfur During Magma Mixing and Implications for Magma Degassing and Ore Formation
合作研究:岩浆混合过程中硫的行为及其对岩浆脱气和成矿的影响
  • 批准号:
    1250239
  • 财政年份:
    2013
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
Collaborative Proposal: Integrated Investigations of Isotope Fractionation in Magmatic Systems
合作提案:岩浆系统中同位素分馏的综合研究
  • 批准号:
    1264537
  • 财政年份:
    2012
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant
Quantifying Rare Earth (REE) and High Field Strength (HFSE) Element Mobility in Fluids at Conditions Appropriate for Forearc to Subarc Cold and Hot Subduction Zones
在适合弧前至弧下冷俯冲带和热俯冲带的条件下量化流体中稀土 (REE) 和高场强 (HFSE) 元素的迁移率
  • 批准号:
    1220548
  • 财政年份:
    2012
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Continuing Grant
Pan American Current Research on Fluid Inclusions Conference
泛美当前流体包裹体研究会议
  • 批准号:
    1019587
  • 财政年份:
    2010
  • 资助金额:
    $ 37.94万
  • 项目类别:
    Standard Grant

相似国自然基金

Rare Metals(稀有金属(英文版))
  • 批准号:
    51224002
  • 批准年份:
    2012
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精神分裂症遗传易感性及发病机理研究
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新型多齿多联氮杂环氮氧化物多氨基多羧基类稀土发光配合物及其在免疫分析中的应用
  • 批准号:
    20761002
  • 批准年份:
    2007
  • 资助金额:
    16.0 万元
  • 项目类别:
    地区科学基金项目

相似海外基金

Real time visualization of separation boundaries for trace rare earth element analysis
痕量稀土元素分析分离边界的实时可视化
  • 批准号:
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Local crystal structure and phase stability of rare earth-metal borides with boron dimensional network structure
硼维网络结构稀土金属硼化物的局部晶体结构和相稳定性
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    19K05643
  • 财政年份:
    2019
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On-chip photon-electron coherent coupling using rare-earth oxide film optical waveguides
使用稀土氧化物薄膜光波导的片上光子电子相干耦合
  • 批准号:
    19H02636
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    2019
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Innovative quantum sensing based on rare earth doped GaN
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    17KK0137
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  • 项目类别:
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