Acquisition of a high resolution, sector field, ICP-MS and laser ablation system

购置高分辨率、扇形场、ICP-MS 和激光烧蚀系统

• 批准号: 0215297
• 负责人: Gregory Ravizza
• 金额: $ 31.3万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0215297&HistoricalAwards=false
• 关键词: Acquisition; resolution; sector; field; ICP

EAR-0215297RavizzaThis award provides support to the University of Hawaii's School of Ocean and Earth Science and Technology (SOEST) for acquisition of a high resolution, sector field, inductively coupled plasma mass spectrometer (HR-SF-ICPMS) and laser ablation system. The mass spectrometer is a versatile instrument for trace analysis in a wide variety of natural materials including seawater, sediments and rocks. The laser ablation unit allows direct trace analysis of many solid materials, eliminating the need for time consuming and expensive chemical dissolution procedures. At SOEST this instrumentation will be used to advance research efforts in chemical oceanography, paleoceanography, geochemistry and volcanology. Analyses of trace metals in seawater will be used to better quantify the rate of supply of dust to the surface ocean and it solubility. This information is required to test current hypotheses that trace metal availability limits biological productivity in large portions of the open ocean. Trace element analyses of biogenic calcium carbonate precipitated by marine organisms will be used to improve our ability to reconstruct the history of ocean temperature changes and fluctuations in atmospheric carbon dioxide levels. Paleoceangraphic data of this sort are used to establish the magnitude and rate of climate variability prior to significant human impact. Data of this type is an essential component of efforts to discern between natural climate variability and human-induced climate perturbations. Trace element and isotope analyses of marine sediments will be performed in order to elucidate the geologic history of chemical weathering. A better understanding of chemical weathering is a necessary part of the geologic community's effort to understand those natural processes that have maintained an atmosphere capable of sustaining macroscopic life for hundreds of millions of years. Sediment geochemistry studies that document concentrations of platinum group elements in the environment will also be conducted. Available data indicated these metals are released from automobile catalytic converters and are enriched in widely distributed areas of the globe. These, and related efforts in environmental geochemistry, are part of the research community's contribution to assessing the importance of emerging human impacts on the global environment. The mass spectrometer and laser ablation system will also contribute to the research program of several volcanologists and petrologists at SOEST. These investigators use trace element data in conjunction with other data sets to understand melting in the deep earth, and the magmatic differentiation processes. These processes are responsible for producing volcanic activity at the surface of the Earth. Research efforts include studies of seafloor volcanism, explosive volcanoes in island arc settings, as well as the unique natural laboratory provided by active volcanism on the big island of Hawaii.***

该奖项为夏威夷大学海洋与地球科学与技术学院（索斯特）提供支持，以获得高分辨率、扇形场、电感耦合等离子体质谱仪（HR-SF-ICPMS）和激光消融系统。质谱仪是一种多功能的仪器，用于对包括海水、沉积物和岩石在内的各种天然物质进行痕量分析。激光烧蚀装置允许对许多固体材料进行直接痕量分析，无需耗时且昂贵的化学溶解程序。 在索斯特，这种仪器将用于推进化学海洋学、古海洋学、地球化学和火山学方面的研究工作。对海水中微量金属的分析将用于更好地量化尘埃向海洋表面的供应率及其溶解度。需要这些信息来检验目前的假设，即微量金属的可用性限制了大部分公海的生物生产力。对海洋生物沉淀的生物成因碳酸钙的微量元素分析将用于提高我们重建海洋温度变化和大气二氧化碳水平波动历史的能力。这类古海洋学数据被用来确定在重大人类影响之前气候变化的幅度和速率。这类数据是区分自然气候变异性和人为气候扰动的努力的一个重要组成部分。将对海洋沉积物进行微量元素和同位素分析，以阐明化学风化的地质历史。更好地了解化学风化是地质学界努力了解那些维持大气层能够维持宏观生命数亿年的自然过程的必要组成部分。 还将进行沉积物地球化学研究，记录环境中铂族元素的浓度。现有数据表明，这些金属是从汽车催化转化器中释放出来的，并在地球仪广泛分布的地区富集。这些工作以及环境地球化学方面的相关工作是研究界对评估人类对全球环境的新影响的重要性所作贡献的一部分。质谱仪和激光烧蚀系统也将有助于索斯特的几个火山学家和岩石学家的研究计划。这些研究人员将微量元素数据与其他数据集结合使用，以了解地球深部的熔融和岩浆分异过程。这些过程是造成地球表面火山活动的原因。研究工作包括研究海底火山活动，岛弧环境中的爆发性火山，以及夏威夷大岛上的活火山活动提供的独特天然实验室。