Collaborative Research: Probing zircon reactivity in aqueous solutions at solubility equilibrium using isotope tracers

合作研究:使用同位素示踪剂探测处于溶解度平衡的水溶液中锆石的反应性

基本信息

  • 批准号:
    2221906
  • 负责人:
  • 金额:
    $ 41.29万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2022
  • 资助国家:
    美国
  • 起止时间:
    2022-09-01 至 2025-08-31
  • 项目状态:
    未结题

项目摘要

The mineral zircon provides an invaluable source of information on Earth's history that extends further back in time than any other minerals (4.1 billion years) due to zircon's extraordinary stability. However, the rock record provides evidence of occasional zircon instability in the Earth's crust and mantle caused by radiation damage and possibly interaction with fluids, resulting in zircon recrystallization. While it has been hypothesized that hot fluids can cause zircon to recrystallize, this hypothesis has not been tested in the laboratory. Because recrystallized zones in zircon can be dated, knowledge of how those zones formed can aid in the interpretation of measured ages, allowing for a more accurate reconstruction of the history of Earth and other planets from which we retrieve zircon-bearing rocks. Knowledge of the mechanisms and conditions of zircon stability should also help evaluate the feasibility of using zircon to safely store highly toxic and radioactive contaminants in geological repositories. STEM workforce training in experimental and analytical techniques will be provided to diverse participants ranging in experience from high school to post-doctoral researchers in laboratories and meeting workshops.This study aims to simulate in the laboratory the process of zircon recrystallization by conducting innovative isotope tracer experiments on zircon-fluid mixtures at high pressures and temperatures. The experimental materials will be characterized using state-of-the-art microanalysis techniques. The following hypotheses will be tested: 1) zircon recrystallizes in aqueous fluid via a dissolution – reprecipitation mechanism that can be detected through measurable Si and O isotope exchange; 2) at the same conditions, small zircon grains will recrystallize, while large grains will not; 3) development of a reaction rim will hinder further reaction, slowing the rate of growth of the reaction rim; 4) large grains of metamict zircon will be replaced by crystalline zircon at a measurable rate, and 5) the replacement of metamict zircon by crystalline zircon proceeds at a constant Si concentration, but the recrystallization rates can be measured with temporal changes in Si and O isotopes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
矿物锆石提供了关于地球历史的宝贵信息来源,由于锆石的非凡稳定性,它比任何其他矿物(41亿年)都要追溯得更远。然而,岩石记录提供的证据表明,在地壳和地幔中,由于辐射损伤和可能与流体的相互作用,锆石偶尔会不稳定,从而导致锆石重结晶。虽然有人假设热流体可以导致锆石重结晶,但这一假设尚未在实验室中得到验证。由于锆石中的重结晶区可以测年,因此了解这些区域如何形成有助于解释测量的年龄,从而可以更准确地重建地球和其他行星的历史,我们从中检索含锆石的岩石。了解锆石稳定性的机制和条件也有助于评估在地质处置库中使用锆石安全储存剧毒和放射性污染物的可行性。STEM的实验和分析技术的劳动力培训将提供给不同的参与者,从高中到博士后的实验室和会议研讨会的研究人员的经验。这项研究旨在通过在高温高压下对锆石流体混合物进行创新的同位素示踪实验,在实验室中模拟锆石重结晶的过程。实验材料将使用最先进的微量分析技术进行表征。本文将对以下假设进行检验:1)锆石在水溶液中通过溶解-再沉淀机制进行再结晶,这种机制可以通过可测量的Si和O同位素交换来检测; 2)在相同条件下,小的锆石颗粒会再结晶,而大的颗粒不会; 3)反应边的发展将阻碍进一步的反应,减缓反应边的生长速率; 4)变晶锆石的大颗粒将以可测量的速率被结晶锆石取代,和5)变晶锆石被结晶锆石的取代在恒定的Si浓度下进行,但再结晶率可以通过Si和O同位素的时间变化来测量。该奖项反映了NSF的法定使命,并且通过使用基金会的学术价值和更广泛的影响审查标准。

项目成果

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John Ayers其他文献

T25 - Availability of Cannabinoid Products in Online Vape Shops
T25 - 在线蒸汽烟商店中大麻素产品的可用性
  • DOI:
    10.1016/j.drugalcdep.2024.111793
  • 发表时间:
    2025-02-01
  • 期刊:
  • 影响因子:
    3.600
  • 作者:
    Nora Satybaldiyeva;Raquel Harati;Tomas Mejorado;Nick Morales;Shannon Ellis;John Ayers;Eric Leas
  • 通讯作者:
    Eric Leas
Chinese Ceramics In The Topkapi Saray Museum, Istanbul: A Complete Catalogue
伊斯坦布尔托普卡帕萨拉博物馆的中国陶瓷:完整目录
  • DOI:
  • 发表时间:
    1986
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Topkapı Sarayı Müzesi;R. Krahl;Nurdan Erbahar;John Ayers
  • 通讯作者:
    John Ayers
A multimodal analysis of degradation processes in 10W PV panels under thermal and mechanical stress
对10W光伏板在热应力和机械应力下退化过程的多模态分析
  • DOI:
    10.1016/j.solmat.2025.113617
  • 发表时间:
    2025-08-01
  • 期刊:
  • 影响因子:
    6.300
  • 作者:
    Iram Sifat;Kallol Biswas;John Ayers;Sung-Yeul Park;Alexander G. Agrios
  • 通讯作者:
    Alexander G. Agrios

John Ayers的其他文献

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{{ truncateString('John Ayers', 18)}}的其他基金

Laboratory Measurements of Trace Element Partition Coefficients Between Zircon, Aqueous Fluid and Silicate Melt at High and Ultrahigh Pressures
高压和超高压下锆石、水溶液和硅酸盐熔体之间微量元素分配系数的实验室测量
  • 批准号:
    0838391
  • 财政年份:
    2009
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Standard Grant
Zr-Mineral Aqueous Solubilities and Zircon/(Fluid-Melt) Partitioning
锆矿物的水溶解度和锆石/(流体熔体)分配
  • 批准号:
    0510092
  • 财政年份:
    2005
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Continuing Grant
Monazite as a Sensitive Indicator of the Timing and Type of Fluid Activity During Metamorphism
独居石作为变质作用过程中流体活动时间和类型的敏感指标
  • 批准号:
    0126020
  • 财政年份:
    2002
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Continuing Grant
Patterned Heteroepitaxial Processing: A New Approach to Mismatched Heteroepitaxy for the Fabrication of High-Performance Semiconductor Devices
图案化异质外延加工:一种用于制造高性能半导体器件的失配异质外延的新方法
  • 批准号:
    9905874
  • 财政年份:
    1999
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Standard Grant
Reliability Study of Oxidized Deposited Polysilicon (ODP) Gate Oxide for Silicon Carbide Power Transistors
碳化硅功率晶体管氧化沉积多晶硅 (ODP) 栅极氧化物的可靠性研究
  • 批准号:
    9906543
  • 财政年份:
    1999
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Standard Grant
Laboratory and Field Investigations of Monazite Paragenesis, Growth Kinetics, Textural Development, and U-Th-Pb Chronometry in Igneous and High-Grade Metamorphic Rocks
火成岩和高品位变质岩中独居石共生、生长动力学、结构发育和 U-Th-Pb 测时的实验室和现场研究
  • 批准号:
    9873626
  • 财政年份:
    1999
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Standard Grant
Experimental Investigation of the Stability and Aqueous Solubility of Ti and Zr-rich Minerals: Implications for HFSE Mobilities in Subduction Zones
富钛和富锆矿物稳定性和水溶性的实验研究:对俯冲带 HFSE 迁移率的影响
  • 批准号:
    9317105
  • 财政年份:
    1994
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Standard Grant
Research Initiation Award: "New Approaches to the Fabrication of Blue Semiconductor Laser Diodes by Vapor Phase Epitaxy"
研究启动奖:“气相外延制造蓝色半导体激光二极管的新方法”
  • 批准号:
    9309079
  • 财政年份:
    1993
  • 资助金额:
    $ 41.29万
  • 项目类别:
    Standard Grant

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