Combining ultratrace speciation and isotopic analyses of minerals and fluids; metal migration and sequestration in ore deposit and environmental research

结合矿物和流体的超痕量形态分析和同位素分析；

• 批准号: RGPIN-2022-03369
• 负责人: Leybourne, Matthew
• 金额: $ 3.72万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754991
• 关键词: Combining; ultratrace; speciation; isotopic; analyses

The unifying vision of my research is to develop new geochemical process models and use advances in analytical techniques to: (i) push detection limits to much lower levels, through in situ chemical chromatography and ultra-trace preconcentration, and (ii) enhance our ability to measure novel isotopic systems at ultra-trace concentrations, with a particular focus on combined speciation and isotope determination. This long-term vision will advance our understanding of critical metal mobility and attenuation in the geosphere (primary ore deposit and secondary dispersion processes) and across the interface between the geosphere and the biosphere. The novelty and expected significance of this research is in the combination of greatly improved detection limits and integration with a multi-isotope approach. The research will focus in particular on isotope systems not widely used in geological and environmental research, and in application to fundamental and applied problems across geological and astroparticle physics research. I plan to support and train 1 PDF for 2 years, 3 PhD students, 4 MSc students and 5 BSc students in geochemistry and low-level background determinations in astroparticle physics in this proposal. Real advances in our understanding of metal sources in mineral deposit systems and migration in the secondary environment will be achieved by, for the first time, a systematic combination of speciation (in terms of the minerals metals bind to in Earth materials and how metals are complexed in solution) and isotopic measurements of individual species. Many of the processes of elemental migration from natural accumulations of metals (ore deposits) are poorly understood; lower detection limits, particularly of isotopes and redox sensitive species will enable my research group to better deconvolute different elemental sources and therefore to understand better the processes involved. There is also a need to improve in situ analytical techniques, in particular in terms of isotopic determinations, which are hampered by the inability to perform chromatographic separations, as is traditionally done for isotopic determinations, to isolate the analyte of interest from interfering isotopes. The infrastructure at QFIR, including new equipment purchased with my recently awarded CFI grant, is critical to my research vision and agenda. Because of my position in both Geological Sciences and the Arthur B. McDonald Canadian Astroparticle Physics Research Institute (MI), my research long-term vision and shorter-term goals must address the needs of both communities. Thus, the combination of the research group in the Queen's Facility for Isotope Research, which I co-direct, with the tools and expertise within MI, represents a unique opportunity for geology and astroparticle physics to inform advances across these disciplines. My background and my research group are ideally suited for this cross-disciplinary work.

我的研究的统一愿景是开发新的地球化学过程模型，并利用分析技术的进步：（i）通过原位化学色谱和超级跟踪预浓缩将检测限制提高到更低的水平，以及（ii）增强我们在超级传播浓度上的新型同位素系统的能力，并具有特定的组合特定量，并确定了组合型的组合型和ISOPOPES的焦点。这种长期的视力将提高我们对地球座（原发性矿石沉积和次要分散过程）以及地质圈和生物圈之间的界面的关键金属迁移率和衰减的理解。这项研究的新颖性和预期意义在于，大大改善的检测极限和与多同位素方法相结合。该研究将尤其着重于未广泛用于地质和环境研究的同位素系统，以及用于地质和肌动颗粒物理学研究的基本和应用问题。我计划支持和培训1 PDF 2年，3名博士学位学生，4名MSC学生和5名在地球化学和低级背景测定的Astroparticle物理学的学生。我们对矿物沉积系统中金属源的理解的真正进步和次级环境中的迁移将首次实现物种物种的系统组合（就矿物质金属与地球材料的结合以及金属在溶液中的复合方式而言）和单个物种的同位素测量。 从金属的自然积累（矿石矿床）中迁移的许多元素迁移过程都鲜为人知。较低的检测极限，特别是同位素和氧化还原敏感的物种将使我的研究小组能够更好地反应不同的元素来源，从而更好地理解所涉及的过程。还需要改进原位分析技术，尤其是在同位素测定方面，这是由于无法进行色谱分离所阻碍的，就像传统上用于同位素确定一样，可以将兴趣的分析物分离出兴趣分析物与干扰同位素的干扰。 QFIR的基础设施，包括我最近授予的CFI赠款购买的新设备，对我的研究愿景和议程至关重要。由于我在地质科学和亚瑟·B·麦当劳加拿大Astroparpicle物理研究所（MI）中的地位，我的研究长期视觉和较短的目标必须满足两个社区的需求。因此，我在女王的同位素研究设施中的研究小组的组合，我与MI中的工具和专业知识共同指导，这是地质和Astroparticle物理学的独特机会，可以为这些学科的进步提供信息。我的背景和研究小组非常适合这项跨学科工作。