Acquisition of a Multi-Collector ICP-MS for Marine and Terrestrial Geochemical Research

这个项目的目标是获得多收集器电感耦合等离子体质谱仪(MC-ICPMS)和后续方法开发，以使夏威夷大学(UH)能够进行跨学科的地球化学研究。地球、海洋和行星科学中的许多分析应用要么需要这样的仪器，要么得到了这样的仪器的加强。例如，由于等离子体源的高电离效率，MC-ICPMS非常适合于用固体源热电离质谱计(TIMS)无法测量的元素的同位素分析。此外，传统上由TIMS进行的同位素分析可以更快地进行，而且在许多情况下，MC-ICPMS可以减少样本量。UH MC-ICPMS的初步计划是开发5种类型的分析能力，每种能力都具有多种应用。这些措施包括：用于高分辨率火山和沉积过程年代学的氡系核素的同位素分析；用于量化局部和全球规模的火山脱气事件的新型过渡金属和类金属分馏火山气体和凝析油研究；通过镁同位素分析对洋壳-海水交换的质量平衡限制；用于岩石学研究的火成岩材料的Hf、ND和Pb同位素分析；以及通过激光烧蚀MC-ICPMS对这些分析物和其他分析物进行原位微观尺度同位素分析。这台新仪器将成为SOEST(海洋与地球科学与技术学院)同位素实验室的一部分，该实验室目前拥有两个TIM和一个辐射计数设施。该实验室被公认为是U系列、铅、钕和锶同位素应用于火山、地幔地球化学、环境和海洋研究主题的领先实验室。建立MC-ICP-MS能力将增强和多样化UH(一家EPSCoR和联邦承认的少数民族教育机构)的研究能力，并促进研究生和本科生的教育机会。SOEST的跨学科特性和MC-ICPMS的广泛能力将允许新的研究领域和现有研究计划之间的交叉。此外，MC-ICPMS将成为许多具有地方和太平洋流域意义的调查的一部分，因为它们侧重于环境资产和夏威夷岛屿环境特有的问题(火山活动、气候记录、珊瑚礁、水质)。这样的研究提高了UH在社区中的地位，并增加了其在环境管理和研究方面的声誉。

0549618RubinThe goals of this project are the acquisition of a multi-collector inductively coupled plasma mass spectrometer (MC-ICPMS) and subsequent methods development to enable cross-disciplinary geochemical research at the University of Hawaii (UH). Numerous analytical applications in Earth, Ocean and Planetary Science either require or are enhanced by such an instrument. For instance MC-ICPMS is well suited to isotopic analyses of elements that cannot be measured by solid-source thermal ionization mass spectrometers (TIMS) because of the high ionization efficiency of the plasma source. In addition, isotopic analyses conventionally done by TIMS can be performed more rapidly and, in many cases, with reduced sample sizes by MC-ICPMS. Initial plans for the UH MC-ICP-MS are to develop 5 types of analytical capabilities, each with multiple applications. These include isotopic analyses of actinide series nuclides to produce high resolution chronologies of volcanic and sedimentary processes, novel transition metal and metalloid fractionation studies of volcanic gasses and condensates to quantify local and global scale volcanic degassing events, mass balance constraints on oceanic crust-seawater exchange via Mg isotopic analysis, Hf, Nd and Pb isotopic analysis of igneous materials for petrologic studies, and in-situ microscopic-scale isotopic analysis of these and other analytes by laser-ablation MC-ICP-MS. The new instrument will become part of the SOEST (School of Ocean and Earth Science and Technology) Isotope Laboratory, which currently houses two TIMS and a radiometric counting facility. The lab is recognized as a leader in U-series, Pb, Nd, and Sr isotope applications to volcanological, mantle geochemical, environmental and marine research topics.Establishing MC-ICP-MS capability will enhance and diversify research capabilities at UH (an EPSCOR and federally recognized minority educational institution) and promote educational opportunities for graduate and undergraduate students. The interdisciplinary character of SOEST and broad capabilities of MC-ICP-MS will allow new areas of research and cross-fertilization between existing research programs. In addition, MC-ICP-MS will become part of numerous investigations that are of local and Pacific-Basin-wide significance because they focus on environmental assets and issues unique to the Hawaiian island setting (volcanism, climate records, coral reefs, water quality). Such research enhances the standing of UH within the community and adds to its reputation for stewardship of and research on the environment.