Understanding genesis of HREE deposits through Experimental and Spectroscopic measurements and atomistic Simulations (REEXSS).

通过实验和光谱测量以及原子模拟 (REEXSS) 了解重稀土矿床的成因。

• 批准号: NE/L002299/1
• 负责人: Bryne Ngwenya
• 金额: $ 9.71万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FL002299%2F1
• 关键词: Understanding; genesis; HREE; deposits; through

The rare earth elements (REEs) or lanthanides (La-Lu) are a group of elements widely used in applications ranging from modern, everyday personal devices such as mobile phones to industrial scale e-tech/green facilities such as wind turbines. The heavy rare earth elements (HREEs, Gd-Lu)) are particularly in high demand as they occur in relatively low concentrations and yet are more widely used for TV phosphors, lasers and computer memories. We currently have a reasonably good understanding of the geological occurrences/associations of REEs but our ability to predict where economic HREE deposits occur and to develop low cost extraction technologies is hampered by lack of understanding of how REEs are transported, concentrated and fractionated (separation between light and heavy REE) as well as how host mineral stability ultimately controls extraction efficiency. This project will bring together a core group of experienced geoscientists grounded in experimental studies of fluid-rock interaction (melts, hydrothermal fluids) with chemical spectroscopists, mineral physicists and industry end-users to engage in a study focussed on addressing key questions relating to transport, concentration and fractionation of REEs. This will be achieved by focussing on the following key questions: (i) Why do we get REE enrichment? By conducting challenging but well constrained experiments simulating the reaction(s) of different fluids with REE-containing minerals, rocks and other compounds we will constrain partitioning and speciation of different REEs.(ii) How does enrichment occur? Enrichment processes will be constrained by conducting absorption spectroscopic measurements of REEs in hydrothermal fluids to determine types and stabilities of the different REE species.(iii) Where does enrichment occur? By carrying out structural characterisation of stable host REE mineral phases to determine crystallographic parameters that control REE occurrence and by performing theoretical calculations to predict which are the stable mineral structures consistent with spectroscopic measurements we will determine where enrichment occursThe work will be carried out in two phases: A scoping study (catalyst phase) designed to build a research consortium that, through Science Innovation Workshops will appraise state of the art science backed by preliminary data collection and modelling to refine key questions for the development of a detailed application to the main phase of the funding round. The main research phase, if awarded will deliver novel experimental, micro-analytical and spectroscopic data plus structural modelling which will enhance significantly our ability to understand the distribution of economically exploitable HREE resources.

稀土元素(REE)或镧系元素(La-Lu)是一组广泛应用的元素，从手机等现代日常个人设备到风力涡轮机等工业规模的电子技术/绿色设施。重稀土元素(HREE，Gd-Lu)的需求量特别大，因为它们的浓度相对较低，但更广泛地用于电视荧光粉、激光和计算机存储器。我们目前对稀土的地质赋存状态/组合有相当好的了解，但由于缺乏对稀土如何运输、浓缩和分馏(轻稀土和重稀土分离)以及宿主矿物稳定性最终如何控制提取效率的了解，我们预测经济的重稀土矿床发生在哪里和开发低成本提取技术的能力受到阻碍。该项目将汇集一批以流体-岩石相互作用(熔体、热液流体)实验研究为基础的经验丰富的地球科学家核心小组，与化学光谱学家、矿物物理学家和工业终端用户一起进行一项研究，重点解决与稀土元素的运输、浓缩和分馏有关的关键问题。这将通过集中解决以下关键问题来实现：(I)为什么我们会得到稀土元素的富集化？通过模拟不同流体(S)与含稀土矿物、岩石和其他化合物的反应，我们将限制不同稀土元素的分配和形态。(Ii)如何发生富集化？将通过对热液中稀土的吸收光谱测量来确定不同稀土物种的类型和稳定性，从而限制富集过程。(3)在哪里发生富集？通过对稳定的寄主稀土矿物相进行结构表征以确定控制稀土赋存状态的结晶学参数，并通过执行理论计算来预测哪些稳定的矿物结构与光谱测量一致，我们将确定哪里发生了浓缩工作将分两个阶段进行：范围研究(催化剂阶段)，旨在建立一个研究财团，该研究财团将通过科学创新工作坊评估最先进的科学水平，并通过初步数据收集和建模来完善关键问题，以便制定详细的应用于本轮融资的主要阶段。如果获奖，主要研究阶段将提供新颖的实验、微观分析和光谱数据以及结构建模，这将显著提高我们了解经济上可开采的重稀土资源分布的能力。