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

该拨款通过主要研究仪器（MRI）计划获得，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）的部分费用支持，该光谱仪带有激光烧蚀微探针，用于高灵敏度，高精度和高空间分辨率的地球化学，地球年代学和宇宙化学研究。多捕收剂HR-ICP-MS被认为是一种潜在的革命性仪器，用于研究具有高电离势的元素的同位素组成，在MC-HR-ICP-MS出现之前，这些元素的同位素组成受到了严肃的研究。PI将获得的Micromass Iso-PlasmaTrace ICP-MS将加强和/或使地球科学的基础研究成为可能。基于基性和超基性样品铂族元素（PGE）高精度分析的核幔交换证据利用Lu-Hf同位素系统确定早期地幔的化学非均质性程度，以及利用铀不平衡系列同位素系统对岩浆通过地幔的时间尺度进行地质年代学研究，这只是考虑到新一代仪器所述的能力，可以解决的研究的几个例子。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. ***