Equipment: Acquisition of an EDS detector and Carbon Coater for Quantitative FEG-SEM Analysis

该合同将允许为位于伯克利的加州大学购买一台能量色散光谱仪（EDS）和一台新的碳涂层机，以及一台高精度厚度监测仪。这些采购将增加一个新的场发射扫描电子显微镜（FEG-SEM）设施，以解决广泛的地质问题。所购置的设备也将成为地球和材料科学电子束微量分析方法新研究生课程的重点。该项目团队还将与一名本科生合作，开发用于空间化学数据可视化和解释的开源Python 3工具，以帮助社区摆脱专有软件。原位化学分析是项目团队在火山学、火成岩学和地幔地球化学研究中不可或缺的一部分。新EDS探测器的能力提供了收集快速、多尺度地球化学信息的能力，这些信息对于过去火山爆发的岩石学分析至关重要，并有可能提供未来火山活动的近实时岩石学监测（例如，评估晶体分带以获得迁移时间，晶体化学以确定岩浆储存深度）。通过EDS进行的全定量化学填图对于研究岩浆泥带中的熔体输运和岩浆分异过程中硫化物饱和的开始也至关重要。此外，新设备也将被加州大学伯克利分校的其他研究人员使用，促进跨学科合作。例如，EDS测绘的化学数据将与岩石磁性数据相结合，以确定古环境中沉积物的氧化还原化学，并评估爆炸性镁铁质岩浆的破碎、烧结和混合之间的时间尺度。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

This award will permit the acquisition of an Energy Dispersive Spectrometer (EDS) and a new carbon coater, with a high-precision thickness monitor for the University of California at Berkeley. These purchases will augment a new Field Emission Scanning Electron Microscope (FEG-SEM) facility to address a wide range of geological problems. The acquired facilities will also represent the focus of a new graduate-level course on electron beam microanalytical methods in the Earth and Material Sciences. The project team will also work with an undergraduate student to develop open-source Python3 tools for visualization and interpretation of spatial chemical data to help the community move away from proprietary software.In situ chemical analysis forms an integral part of the project teams research in volcanology, igneous petrology, and mantle geochemistry. The capabilities of the new EDS detector provide the ability to collect rapid, multi-scale geochemical information that will be vital for petrological analysis of past volcanic eruptions and has potential to provide near real-time petrological monitoring of future volcanic activity (e.g., assessing crystal zoning to obtain transport times, crystal chemistry to determine magma storage depths). Fully quantitative chemical mapping via EDS is also critical to research on melt transport in magmatic mush zones and the onset of sulfide saturation during magmatic differentiation. Furthermore, the new equipment will also be utilised by other researchers at UC Berkeley, promoting interdisciplinary collaborations. For example, chemical data from EDS mapping will be combined with rocks magnetic data to determine sediment redox chemistry in ancient environments, and to assess the timescales between breakage, sintering and mixing of explosive mafic magmas.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.