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

该合同将允许为加州大学伯克利分校购买一台能量色散光谱仪（EDS）和一台新型碳涂层机，并配备高精度厚度监测器。这些采购将增加新的场发射扫描电子显微镜（FEG-SEM）设备，以解决广泛的地质问题。获得的设施也将成为地球和材料科学中电子束微分析方法的新研究生课程的重点。项目团队还将与一名本科生合作，开发用于可视化和解释空间化学数据的开源Python3工具，以帮助社区摆脱专有软件。现场化学分析是项目组在火山学、火成岩岩石学和地幔地球化学研究中不可或缺的一部分。新型EDS探测器的功能提供了快速收集多尺度地球化学信息的能力，这些信息对于过去火山喷发的岩石学分析至关重要，并且有可能提供对未来火山活动的近实时岩石学监测（例如，评估晶体分区以获得运输时间，晶体化学以确定岩浆储存深度）。通过能谱仪进行全面定量的化学制图对于研究岩浆泥状带的熔体运移和岩浆分异过程中硫化物饱和度的发生也至关重要。此外，加州大学伯克利分校的其他研究人员也将使用这些新设备，促进跨学科合作。例如，EDS测绘的化学数据将与岩石磁数据相结合，以确定古代环境中沉积物的氧化还原化学，并评估爆炸性基性岩浆的破裂、烧结和混合之间的时间尺度。该奖项反映了美国国家科学基金会的法定使命，并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，被认为值得支持。

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.