Acquisiton of a Multiple Collector Inductively-Coupled Plasma Mass Spectrometer of Geochemical, Geochronological and Cosmochemical Applications

9724409卡尔森这笔赠款通过重大研究仪器计划提供574,172美元，作为购买多收集器、高分辨率电感耦合等离子体质谱仪(MC-HR-ICP-MS)和激光烧蚀微探头的部分费用，用于地球化学、地质年代学和宇宙化学中的高灵敏度、高精度和高空间分辨率研究。多收集器HR-ICP-MS被认为是研究具有高电离电位的元素的同位素组成的潜在革命性仪器，在MC-HR-ICP-MS出现之前，已经暗示了认真的研究。国际和平研究所将获得的微质量同位素示踪电感耦合等离子体质谱将加强和/或使地球科学的基础研究成为可能。根据对镁铁质和超镁铁质样品中铂族元素(PGE)的高精度分析提供的核幔交换证据，使用Lu-Hf同位素系统学确定早期地幔化学不均匀程度，以及基于铀不平衡系列同位素系统学对岩浆通过地幔运移时间尺度的地质年代学研究，这些只是鉴于这一新一代仪器所具有的能力而可以处理的研究的几个例子。该仪器还将通过CIW-DTM的博士后/客座科学家计划，为世界上一些顶尖的地球科学学者提供最先进的地球化学仪器培训。***

9724409 Carlson This grant, made through the Major Research Instrumentation (MRI) Program, provides $574,172 as partial support of the costs of acquiring a multi-collector, high resolution inductively coupled plasma mass spectrometer (MC-HR-ICP-MS) with a laser ablation microprobe for high sensitivity, high precision and high spatial resolution studies in geochemistry, geochronology and cosmochemistry. The multi- collector HR-ICP-MS is considered a potentially revolutionary instrument for studies of the isotopic composition of elements with high ionization potentials which, prior to the advent of the MC-HR-ICP-MS, have alluded serious study. The Micromass Iso-PlasmaTrace ICP-MS that the PI's will acquire will enhance and/or make possible fundamental studies in the Earth sciences. Evidence for core-mantle exchange based on high precision analyses of platinum group elements (PGE) in mafic and ultramafic samples, determination of the degree of chemical heterogeneity in the early mantle using Lu-Hf isotope systematics and geochronologic investigations of time scales of magma transport through the mantle based on uranium disequilibria series isotope systematics are just a few of the examples of the research that can be addressed given the stated capabilities of this new generation instrument. This instrument will also provide training on state-of-the-art geochemical instrumentation for some of the top earth science scholars in the world through CIW-DTM's postdoctoral/guest scientist program. ***