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

这项奖励将支持购买一台新的惰性气体质谱仪，并建设两条新的提取管线？一个是关于地壳流体的，一个是关于岩石和矿物的，在密歇根大学地球和环境科学系。密歇根大学目前的设备很陈旧，现在正在影响测量效率，以及使用更现代的设备达到更高精度的能力。随着PI和PIS？S的研究兴趣也不断扩大，目前的MAP215和提取系统已经投入使用，分析样品的难度远远超过原计划的淡水样品。追求新的研究方向需要新的和更坚固的提取和提纯惰性气体管路，以及新的、能力更强的质谱仪，以便能够分析更多种类的样品。通过购置一台新的质谱计以及建造两个新的萃取系统而取得的智力成就是多重的。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，以进一步研究它们持有和保存太阳惰性气体特征的潜力。这也将有助于更好地理解惰性气体在非饱和带中的行为，从而改进惰性气体温度模型，并更准确地重建大陆地区的古气候。购买这一新设备还将有助于更好地了解冰和冰川中惰性气体的行为，使我们能够限制覆盖的冰湖(例如南极洲)的时间演变，从而限制该地区过去的气候。此外，对地幔岩石中稀有气体同位素的分析将使人们对地幔地球化学有新的认识。总体而言，该奖项带来的精度提高和产出增加将对从地幔地球化学到古气候学、水文地质学和环境等多个领域产生重大积极影响。

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.