Instant geochemistry from mountain tops to the mid ocean ridges: X-ray Fluorescence (XRF) Spectroscopy on the move

从山顶到大洋中脊的即时地球化学：移动中的 X 射线荧光 (XRF) 光谱

• 批准号: NE/T008873/1
• 负责人: Suzanne MacLachlan
• 金额: $ 13.8万
• 依托单位: NATIONAL OCEANOGRAPHY CENTRE
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FT008873%2F1
• 关键词: Instant; geochemistry; mountain; tops; mid

Non-destructive, high-resolution, sediment and rock core scanners incorporating XRF spectrometry and other sensors are a key technique in petroleum, mining and environmental industrial applications and are now widely used in the earth and environmental sciences. They have radically improved our capability to understand naturally occurring and man-made processes in the terrestrial and marine environments. What is currently missing is an adaptive system that can provide instant geochemical compositions, including rare-earth elements (REEs), of hand specimens and sediment cores within field and laboratory situations. Furthermore, immediate analyses in the field may allow strategic changes to sample collection and site selection based upon geochemical results in the field. Such equipment provides precise and accurate field measurements that can represent primary data or be used to inform later laboratory protocols. NERC science currently does not have access to the market leading Olympus XRF Vanta M, the only sensor with REE capability that can be integrated with the Geotek Multi-Sensor Core Logger (MCSL). This instrument will allow BOSCORF to facilitate simultaneous XRF and geophysical properties analysis of sediments and other environmental samples and will further enhance BOSCORF's internationally recognised reputation of excellence. The addition of a Vanta system will substantially fill an analytical gap to significantly extend workflow. The seagoing-component of the XRF will introduce new opportunities to the science party and will allow a more efficient use of ship time (one day at sea costing ~£35k; £100 per laboratory analysis). Currently, the majorities of samples taken at sea are laboratory analysed post expedition. Thus, repeat expeditions are necessary to further investigate the field site, which is an expensive and time-consuming process for the scientists as well as for the funding agency. Near-real to real time assessment of rock and sediment compositions with a portable XRF will provide a dynamic decision support while being in the field, i.e. sampling strategies can be orientated towards the most promising targets, resulting in a cost and time efficient field campaign with maximum output for budget and science.The MSCL systems at BOSCORF enable a suite of geophysical measurements to be obtained rapidly, accurately and automatically on sediment or rock cores. Only Olympus portable XRFs can be integrated with the Geotek MSCL-XYZ system that BOSCORF currently has. No other portable XRF can be installed for automated sediment/rock core logging and combined with physical property sensors. MSCL-XYZ is a unique automated multi-core logging system for undertaking various surface core measurements. By adding the Vanta to this system multiple core sections (up to seven 1.5 m core sections), can be loaded onto the workstation, which are then logged in a single operation. This provides low user interaction system to collect high quality data rapidly.XRF System advances include:1. The Olympus Vanta M will include a high kV source (up to 50 kV) offering the ability to obtain information on the REEs that are not possible from many other portable XRFs on the market.2. The Olympus Vanta series benefits from market-leading signal processing technology called "Axon". Axon technology is a software development that optimises the detector to provide higher X-ray counts per second and faster results. This will allow users to operate on a typical 15 second analysis time.

结合XRF光谱仪和其他传感器的非破坏性、高分辨率沉积物和岩芯扫描仪是石油、采矿和环境工业应用中的关键技术，现在广泛用于地球和环境科学。它们从根本上提高了我们理解陆地和海洋环境中自然发生和人为过程的能力。目前缺少的是一个适应性系统，可以提供即时的地球化学成分，包括稀土元素，现场和实验室条件下的手标本和沉积物芯。此外，现场的即时分析可能允许根据现场的地球化学结果对样本收集和地点选择进行战略性改变。这种设备提供精确和准确的现场测量，可以代表原始数据或用于通知以后的实验室协议。NERC science目前无法获得市场领先的Olympus XRF Vanta M，这是唯一一款可与Geotek多传感器岩心记录仪（MCSL）集成的具有REE功能的传感器。该仪器将使BOSCORF能够促进对沉积物和其他环境样品进行同步XRF和地球物理特性分析，并将进一步提高BOSCORF在国际上公认的卓越声誉。Vanta系统的加入将大大填补分析空白，从而大大扩展工作流程。XRF的航海部分将为科学团队带来新的机会，并将允许更有效地利用船舶时间（海上一天的成本约为3.5万英镑;每个实验室分析100英镑）。目前，在海上采集的大多数样本都是在考察后进行实验室分析。因此，需要重复考察，以进一步调查现场，这对科学家和资助机构来说都是一个昂贵和耗时的过程。使用便携式XRF对岩石和沉积物成分进行近真实的到真实的时间评估，将在现场提供动态决策支持，即采样策略可以面向最有希望的目标，从而实现成本和时间效率高的现场活动，并为预算和科学提供最大的产出。BOSCORF的MSCL系统可以快速获得一套地球物理测量结果，准确和自动地对沉积物或岩石岩心进行分析。只有Olympus便携式XRF可以与BOSCORF目前拥有的Geotek MSCL-XYZ系统集成。没有其他便携式XRF可以安装用于自动沉积物/岩心测井并与物理属性传感器结合使用。MSCL-XYZ是一种独特的自动化多岩心测井系统，用于进行各种地面岩心测量。通过将Vanta添加到该系统中，可以将多个堆芯段（最多7个1.5 m堆芯段）装载到工作站上，然后在一次操作中记录。这提供了低的用户交互系统，以快速收集高质量的数据。Olympus Vanta M将包括一个高kV电源（高达50 kV），能够获得市场上许多其他便携式XRF无法获得的稀土元素信息。2.奥林巴斯Vanta系列得益于市场领先的信号处理技术“Axon”。Axon技术是一种软件开发，可优化探测器，以提供更高的每秒X射线计数和更快的结果。这将允许用户在典型的15秒分析时间内操作。