Deconvoluting the fundamental processes of metal migration from ore deposits; source to sink

对金属从矿床迁移的基本过程进行解卷积；

• 批准号: RGPIN-2016-05910
• 负责人: Leybourne, Matthew
• 金额: $ 1.75万
• 依托单位: Laurentian University of Sudbury
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=615982
• 关键词: Deconvoluting; fundamental; processes; metal; migration

My research focuses on deciphering the mechanisms and processes by which metals and metalloids migrate from buried mineralization to the surface through thick cover. This work is important because most near surface mineral deposits have been discovered; exploration needs to extend to greater depth. Furthermore, these metal migration processes also have significant in understanding human and ecosystem health. Currently, my research team includes 3 PDF, 2 PhD, 7 MSc and 2 BSc students (some co-supervised). This team will increase with the 2 PhD, 3 MSc and 5 BSc students included in this proposal. My team’s work has revealed that metals can migrate through thick cover via different mechanisms based on the climate, seismicity and groundwater composition. Although we have been able to add much to the understanding of metal migration through thick cover, a number of theoretical and practical questions remain unanswered, including 1) the importance of ionic and electrochemical transport, including the role of microbes; 2) how metals and metalloids are sequestered in surface; and 3) how thick cover influences exploration techniques and mitigation of water and soil contamination. The key to answering these questions and understanding element migration processes requires a multidisciplinary approach (geochemistry, geology, microbiology, and soil science) that operates from the nano- and micron-scale (laser ablation, SEM, TEM) to the scale of an ore deposit. To address these questions I propose research using two field sites; the Martiniere deposit (Ontario) is a mixed Au and base metal deposit with thick till cover and the Sisson W-Mo deposit is dominated by metalloids (i.e., W, Mo, Tl). Field techniques (in situ pH, Eh, redox sensitive species) and samples (i.e., soil, till, groundwater) will be augmented by laboratory experiments (column, redox, and adsorption) to determine and quantify vertical migration of metals through till. We will investigate in detail where metals are being sequestered and what happens under variable conditions of water-rock-soil interaction in different geological media. Another key aspect of this research will be to use traditional and non-traditional isotopic techniques (e.g., Pb, Se, Cu, Fe) to quantify redox processes and better fingerprint metal sources. This project will involve developing sampling protocols to preserve the speciation of these metalloids as they migrate away from the ore deposit source and undergo changes in redox and water chemistry. This research will lead to new understanding of metal versus metalloid speciation and migration, refinement of models for migration of metals through thick cover, and novel approaches to understanding geochemical baselines. The proposal will result in the training of HQP at the PhD, MSc and BSc level in state-of-the-art analytical methods, geochemical modeling and field protocols.

我的研究重点是金属从矿物质迁移到厚度的机制，因为这项工作很重要。 D。 我的团队的工作表明，我们可以通过气候位置的不同机制迁移厚度，我们能够理解金属通过厚盖离子的理解，包括1）包括离子和电化学运输的重要性微生物的作用； 2）在表面上隔离； 从纳米和微米级（激光消融，sem，tem）中，回答这些迁移迁移的关键是ialtidiDiDiad学科方法ialtididiDiDyciles方法。混合的澳大利金属沉积物厚度直至覆盖，Sisson W-MO沉积物由金属植物（即W，W，MO，TL）主导。 ，地下水）将通过LaborAtim Ents（柱，氧化还原和吸附）来确定和量化金属贯穿的垂直迁移，我们将详细调查。 。经历了氧化还原和水化学的变化。 这项研究将导致新的金属物种形成和迁移覆盖，以及了解地球化学基准的新方法。地球化学建模和现场协议。