Acquisition of a new noble gas mass spectrometer and extraction system for the University of Michigan

为密歇根大学采购新型惰性气体质谱仪和萃取系统

• 批准号: 1049822
• 负责人: M. Clara Castro
• 金额: $ 57.7万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-15 至 2018-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049822&HistoricalAwards=false
• 关键词: Acquisition; new; noble; gas; mass

This award will support the acquisition of a new noble gas mass spectrometer and construction of two new extraction lines ? one for crustal fluids and one for rocks and minerals in the Department of Earth and Environmental Sciences at the University of Michigan. Current equipment at the University of Michigan is old and is now taking a toll in terms of measurement efficiency as well as its ability to reach greater levels of accuracy made possible with more modern equipment. As the PI and co-PIs?s research interests have also expanded, the current MAP215 and extraction system have been pressed into service analyzing samples that are far more challenging than the originally planned freshwater samples. Pursuing new directions of research requires new and more robust extraction and purification noble gas lines as well as a new, more capable mass spectrometer which will enable the analysis of a wider variety of samples. The intellectual achievements made possible through the acquisition of a new mass spectrometer as well as the construction of two new extraction systems are multiple. For example, it will allow us to conduct routine studies of noble gases in old fluids in cratonic regions to further investigate their potential in holding and preserving solar noble gas signatures. It will also lead to an improved understanding of noble gas behavior in the unsaturated zone and thus, improved noble gas temperature models and more accurate paleoclimate reconstructions in continental areas. Acquisition of this new equipment will also lead to a better understanding of noble gases behavior in ice and glaciers allowing us to place constraints in the temporal evolution of covered ice lakes (e.g., in Antarctica) and thus, on the past climate in the region. Furthermore, analyses of noble gas isotopes in mantle rocks will allow new insights into mantle geochemistry. Overall, the improved precision and enhanced output resulting from this award will have a major positive impact on multiple fields, from Mantle Geochemistry to Paleoclimatology, Hydrogeology and the Environment.

该合同将用于购买一台新的惰性气体质谱仪和建设两条新的萃取线。一个是研究地壳流体的，另一个是研究密歇根大学地球与环境科学系的岩石和矿物的。密歇根大学目前的设备很老旧，在测量效率和达到更高精度水平的能力方面正在付出代价，而更现代化的设备是可能实现的。作为PI和co-PI ？随着研究兴趣的扩大，目前的MAP215和提取系统已经投入使用，分析样品比原计划的淡水样品更具挑战性。追求新的研究方向需要新的和更强大的提取和净化稀有气体线，以及新的，更强大的质谱仪，这将使分析更广泛的样品。通过购置一台新的质谱仪和建造两套新的萃取系统，所取得的智力成就是多方面的。例如，它将使我们能够对克拉通地区旧流体中的惰性气体进行常规研究，以进一步研究它们在保持和保存太阳惰性气体特征方面的潜力。这也将有助于提高对不饱和带稀有气体行为的认识，从而改进大陆地区稀有气体温度模型和更准确的古气候重建。获得这种新设备还将使我们更好地了解冰和冰川中的惰性气体行为，从而使我们能够对被覆盖的冰湖（例如，在南极洲）的时间演变施加限制，从而对该地区过去的气候施加限制。此外，对地幔岩石中稀有气体同位素的分析将使我们对地幔地球化学有新的认识。总的来说，该奖项所带来的精度和产量的提高将对多个领域产生重大的积极影响，从地幔地球化学到古气候学、水文地质学和环境学。