Acquisition of microsampling equipment and peripherals to create the NAU Earth Materials Microanalytical (EMMA) Facility

采购微量采样设备和外围设备以创建 NAU 地球材料微量分析 (EMMA) 设施

• 批准号: 0450977
• 负责人: Mary Reid
• 金额: --
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-10-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0450977&HistoricalAwards=false
• 关键词: Acquisition; microsampling; equipment; peripherals; create

0450977ReidThis grant supports acquisition of equipment for research on microscale heterogeneity in trace element, radiogenic, and stable isotopic compositions of natural materials. The Department of Geology at Northern Arizona University will acquire a Nd-YAG UV laser and desolvation nebulizer sample introduction systems to be interfaced to an existing multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS), a microdrill, and a continuous flow system to be mated to an existing stable isotope ratio mass spectrometer (SIRMS). These peripherals will allow for micron-scale sampling of microgram sized samples that can be directly introduced into the mass spectrometers. The UV laser ablation system and desolvation nebulizer will support research on the residence time and chemical evolution of crustal magma chambers that requires radiogenic isotope geochronologic (e.g., U-series disequilibria) and trace element analysis of microscale, concentric growth rims of accessory phases (e.g., zircon and allanite). The microdrill and continuous flow system will support research on pathways and geochemical evolution of crustal fluids driven by tectonic forces at active margins. Additional research that would be supported include: themobarometric investigations of the Proterozoic crustal assembly of the North American Continent; stratigraphic correlation and evaluation of the distal extent of Quaternary tephras in the Western U.S.; and "forensic" studies of the transport and fate of radioactive fallout.***

0450977reid本拨款支持购置设备，用于研究微量元素、放射性成因和天然材料稳定同位素组成的微尺度非均质性。北亚利桑那大学地质系将获得Nd-YAG紫外激光和脱溶雾化器样品导入系统，该系统将与现有的多收集器电感耦合等离子体质谱计（MC-ICP-MS）、微钻和连续流系统相连接，该系统将与现有的稳定同位素比体质谱计（SIRMS）相匹配。这些外围设备将允许微米级采样微克大小的样品，可以直接引入到质谱仪。紫外激光消融系统和脱溶雾化器将支持地壳岩浆房停留时间和化学演化的研究，这些研究需要放射性成因同位素年代学（如u系列不平衡）和微量元素分析，辅助相的微尺度、同心生长边缘（如锆石和allanite）。微钻和连续流系统将为研究活动边缘构造力驱动下地壳流体的路径和地球化学演化提供支持。将得到支持的其他研究包括：北美大陆元古代地壳组合的温度测量研究；美国西部第四纪泥层的地层对比与远端范围评价；以及对放射性沉降物的运输和命运的“法医”研究