Dating and Isotopic Characterisation for Decarbonisation, Energy, Environment (DICharDEE)

脱碳、能源、环境的年代测定和同位素表征 (DICharDEE)

• 批准号: NE/V01742X/1
• 负责人: Matthew Horstwood
• 金额: $ 92.12万
• 依托单位: British Geological Survey
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FV01742X%2F1
• 关键词: Dating; Isotopic; Characterisation; Decarbonisation; Energy

After a volume of rock forms its chemistry can be altered by geologic events, that move fluids through fractures in the rock. These fluids leach elements from the rocks, can transport them over significant distances, and potentially form enrichments of the elements we need for green technology. In pursuit of Net Zero carbon emissions, we need to use the properties of the volumes of rock beneath the ground. For example, to efficiently extract green geothermal heat energy, fluids need to efficiently flow through rock fractures. Yet we don't want to store clean energy (e.g. hydrogen) or waste energy products (e.g. CO2 and radioactive waste) deep within the ground if fluids can escape. We also need to better understand the processes and events that concentrate the metals within rocks, that we need for modern society. To use our subsurface resources appropriately and decarbonise our energy and resource intensive activities, we need to investigate fluid movement through rocks. For example, we need to understand how carbon dioxide and hydrogen move through volumes of rock and over what timescales? Which geological events form key metal resources and how can this knowledge be used to reduce the impact of their exploration? We also need to understand what will occur once humans have interacted with the rock by injecting, extracting and storing resources there. The spatial scale of many of these rock-fluid reactions requires that we can investigate extremely small chemical variations (isotopes) of specific elements in minerals at spatial scales 10s to 1000s times smaller than a millimetre and do this within the context of the surrounding mineral chemistries and structures. This is much smaller than we can achieve by the typical methods scientists use where rocks are broken-up and the elements of interest are purified from mineral grains in a laboratory. Instead, we need to use lasers to target and sample these extremely small amounts of sample, directly into an instrument (mass spectrometer). However, clashes or 'interferences' then occur between the isotopes we want to analyse and those we do not, because they behave similarly in the mass spectrometer. This limits our potential to answer important questions about the rocks, fluids and alterations. This bid requests funds to purchase new instrument technology - a collision and reaction cell, multi-collector plasma mass spectrometer (CRC-MC-ICP-MS) with MS/MS capability - that will be coupled to a large-array of existing laser technology already at the host institute. This instrument uses gasses to react with and purify specific elements, removing the interferences in seconds that would normally takes days in a laboratory, and can decipher mineral reactions at the necessary micro-scale. In this way we can contribute to the UK becoming a world-leader in using the subsurface to achieve Net Zero, whilst still providing the raw materials our economy requires.

在大量岩石形成后，其化学成分可能会被地质事件改变，即流体通过岩石中的裂隙移动。这些流体从岩石中浸出元素，可以将它们运输到很远的距离，并可能形成我们绿色技术所需的元素的浓缩。在追求净零碳排放的过程中，我们需要利用地下岩石体积的特性。例如，为了有效地提取绿色地热能量，流体需要有效地流经岩石裂隙。然而，如果流体可以外泄，我们不想将清洁能源(如氢气)或废能产品(如二氧化碳和放射性废物)深埋在地下。我们还需要更好地了解在岩石中浓缩金属的过程和事件，这是我们现代社会所需要的。为了合理利用我们的地下资源，并使我们的能源和资源密集型活动脱碳，我们需要研究流体在岩石中的运动。例如，我们需要了解二氧化碳和氢是如何在大量岩石中移动的，以及在什么时间尺度上移动？哪些地质事件构成了关键的金属资源？如何利用这些知识来减少其勘探的影响？我们还需要了解，一旦人类通过注入、提取和储存资源与岩石相互作用，将会发生什么。许多岩石-流体反应的空间尺度要求我们可以在小于一毫米的空间尺度上研究矿物中特定元素的极小化学变化(同位素)，并在周围矿物化学和结构的背景下进行这项工作。这比科学家们使用的典型方法要小得多，科学家们使用的方法是在实验室里从矿物颗粒中分解岩石并提纯感兴趣的元素。相反，我们需要使用激光来瞄准并采样这些极少量的样本，直接进入仪器(质谱仪)。然而，我们想要分析的同位素和我们不想分析的同位素之间会发生冲突或“干扰”，因为它们在质谱仪中的行为相似。这限制了我们回答有关岩石、流体和蚀变的重要问题的可能性。这项投标要求资金购买新的仪器技术--碰撞和反应池、具有MS/MS能力的多收集器等离子质谱仪(CRC-MC-ICP-MS)--这些技术将与东道主研究所现有的大量激光技术相结合。这种仪器使用气体与特定元素反应并提纯，在几秒钟内消除干扰，而这通常需要在实验室中花费数天时间，并可以在必要的微尺度上破译矿物反应。通过这种方式，我们可以为英国在利用地下实现净零排放方面成为世界领先者做出贡献，同时仍然提供我们经济所需的原材料。