Acquisition of an X-ray Fluorescence Spectrometer for Research in Petrology and Paleoclimatology

0842167 Glazner该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。该赠款支持购买配备波长色散光谱仪（WDS）的X射线荧光光谱仪（XRF）。 PI Alan Glazner和Stephen Myers将收购并监督理学台式XRF模型的管理和操作，该模型配有200 W风冷X射线管。 该仪器将在很大程度上取代内部使用的老化直流等离子体（DCP）光谱仪，用于分析酸消化固体地质材料和天然沃茨中的主要、次要和某些微量元素。 XRF非常适合于全岩元素分析的主要和次要元素，因为样品被熔化到玻璃盘中进行分析，避免了与材料的酸消化相关的问题，并且样品分析对时间不敏感。 WDS-XRF将支持PI对地幔岩和流纹岩熔岩成因的研究，重点是内华达州山脉地区地壳物质的岩石成因。 额外的研究人员和三角研究人员对层状火成岩侵入体的起源，火山岩的岩石成因，包括火山碎屑沉积物，玄武岩和玄武岩熔岩，以及石器考古文物的起源研究的研究也将得到所要求的XRF的支持。 该仪器将补充现有的XRF核心扫描仪，主要致力于古环境研究。 本科生将通过参与需要批量元素分析的研究应用，在XRF样品制备技术，仪器操作数据分析方面进行培训。

0842167GlaznerThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This grant supports acquisition of a x-ray fluorescence spectrometer (XRF) equipped with a wavelength dispersive spectrometer (WDS). PIs Alan Glazner and Stephen Myers will acquire and oversee management and operation of a Rigaku benchtop XRF model with a 200 W air cooled x-ray tube. The instrument will largely supplant in-house use of an aging direct current plasma (DCP) spectrometer for analysis of major, minor and some trace elements in acid digested solid geological materials and natural waters. XRF is ideally suited for whole rock elemental analysis for major and minor elements as samples are fused into glass disks for analysis, problems associated with acid digestion of materials are avoided and sample analysis is not time sensitive. The WDS-XRF will support PI research on the genesis of silicic plutonic rocks and rhyolitic lavas with a focus on the petrogenesis of crustal materials in the Sierra Nevada region. Additional UNC and Research Triangle faculty research on the origin of layered igneous intrusions, petrogenesis of volcanics, including pyroclastic deposits, silicic and basaltic lavas, and studies of the provenance of lithic archaeological artifacts will also be supported by the requested XRF. The instrument will complement an existing XRF core scanner at UNC that is largely dedicated to paleoenvironmental research. Undergraduate students will be trained in XRF sample preparation techniques, instrument operation data analysis through engagement in research applications that require bulk elemental analysis.