Electron-probe microanalyzer (EPMA) for geomaterials research

用于岩土材料研究的电子探针显微分析仪 (EPMA)

• 批准号: 458594072
• 金额: --
• 依托单位: Rheinisch-Westfälische Technische Hochschule Aachen
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/458594072?language=en
• 关键词: Electron; probe; microanalyzer; EPMA; geomaterials

Electron-probe microanalysis (EPMA) is a widely established method for spatially resolved analysis of the chemical composition of solid phases (minerals, melt inclusions) in the Earth Sciences. Combining major and trace element analysis of minerals using EPMA and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has resulted in fundamentally new insight into the processes of crustal fluid flow and formation of world-class hydrothermal metal ore deposits, as demonstrated by our track record in geofluids and geomaterials research. We therefore apply for funding for a next-generation EPMA instrument equipped with greatly improved WDS spectrometers that opens up new possibilities for high-precision analysis of the major element composition of complex minerals and low-concentration analysis of halogens (F, Cl) in hydrous silicates and phosphates, which are key tracers of hydrothermal processes. The new EPMA will replace a more than 20 years old instrument, which is increasingly affected by technical problems, extended downtimes and continuously rising costs for maintenance and repair. The new EPMA will be used by a consortium of 4 research groups at RWTH Aachen University, which are the Applied Mineralogy and Economic Geology, Crystallography, Geology and Mineral Resources Engineering groups. The new EPMA instrument will make it possible to perform frontier research in geomaterials and geofluids, including the sources and partitioning of halogens in crustal fluids, the formation of world-class hydrothermal and magmatic-hydrothermal metal ore deposits, the production and migration of fluids and metals during metamorphism and partial melting of crustal rocks, the diagenetic evolution of major sedimentary basins, the chemical effect of deformation and mobilization of salt deposits, the distribution of critical metals in new types of ore deposits, and the link between chemistry and physical properties of REE and Zr phases.

电子探针微分析（EPMA）是地球科学中广泛建立的一种空间分辨分析固相（矿物、熔体包裹体）化学成分的方法。结合EPMA和激光烧蚀电感耦合等离子体质谱（LA-ICP-MS）对矿物的主要和微量元素分析，从根本上对地壳流体流动过程和世界级热液金属矿床的形成产生了新的见解，正如我们在地球流体和地质材料研究方面的记录所证明的那样。因此，我们申请资助下一代EPMA仪器，该仪器配备了大大改进的WDS光谱仪，为复杂矿物的主要元素组成的高精度分析和水热过程关键示踪剂含水硅酸盐和磷酸盐中的低浓度卤素（F, Cl）的分析开辟了新的可能性。新的EPMA将取代已有20多年历史的仪器，该仪器受到技术问题的影响越来越大，停机时间延长，维护和维修成本不断上升。新的EPMA将由亚琛工业大学的4个研究小组组成的联盟使用，它们是应用矿物学和经济地质学、晶体学、地质学和矿产资源工程小组。新的EPMA仪器将使地质物质和地质流体的前沿研究成为可能，包括地壳流体中卤素的来源和分配，世界级热液和岩浆热液金属矿床的形成，变质作用和地壳岩石部分熔融过程中流体和金属的产生和迁移，主要沉积盆地的成岩演化，盐矿变形和动员的化学效应。关键金属在新类型矿床中的分布，以及稀土、锆相化学与物理性质之间的联系。