Acquisition of an Isotope Ratio Gas Source Mass Spectrometer

该资助用于购买俄勒冈大学地质科学系配备高温热解样品导入系统的多收集器、双入口、稳定同位素比气源质谱仪（SIRMS）。sims将补充现有的CO2激光加热氟化线（LHF）。LHF sims将支持广泛的稳定同位素研究，这些研究需要或将受益于非常小气体体积的高精度分析。例如，火山气溶胶沉淀的17O同位素组成中记录的氧的非质量依赖同位素分馏（一种有希望的火山喷发柱与地球保护臭氧层相互作用的代理），更传统的岩石学/火山学研究，即斑晶中的d18O分带，以帮助限制岩浆停留时间，分析火山玻璃中记录的岩浆脱气的氢同位素信号，古土壤、牙釉质化石和骨磷灰石的稳定同位素研究作为古温度和生物古饮食的代用物。LHF-SIRMS将成为俄勒冈大学地质科学系的第一个稳定同位素质谱仪，并将在整个校园内广泛使用。该设施将作为太平洋西北地区稳定同位素分析的区域中心，与俄勒冈州立大学和华盛顿大学的设施相辅相成。该设施还将支持最先进的稳定同位素研究和方法的本科生和研究生水平的研究培训。俄勒冈大学地球科学系在招收和培养大量女学生方面有着令人钦佩的记录。新的SIRMS设施将进一步推动部门的目标，使代表性不足的群体接触到地球科学研究和研究方法

0548526BindemanThis grant supports acquisition of a multi-collector, dual inlet, stable isotope ratio gas source mass spectrometer (SIRMS) equipped with a high temperature pyrolysis sample introduction system in the Department of Geological Sciences at the University of Oregon. The SIRMS will complement an existing CO2 laser heated fluorination line (LHF). The LHF SIRMS will support a wide range of stable isotopic research that requires or will benefit from high precision analyses of very small gas volumes. Examples include studies of non-mass dependent isotopic fractionation of oxygen as be recorded in the 17O isotopic composition of volcanic aerosol precipitates (a promising proxy of volcanic eruption column interactions with the Earths protective ozone layer), more traditional petrologic/volcanologic studies of d18O zoning in phenocrysts to help constrain magmatic residence times, analysis of hydrogen isotopic signals of magmatic degassing as recorded in volcanic glasses, and stable isotopic investigations of paleosols, fossil dental enamel and bone apatite as proxies of paleotemperatures and organism paleodiets. The LHF-SIRMS will be the first stable isotope mass spectrometer of its kind available to faculty in the Department of Geological Sciences and more broadly across campus at the University of Oregon. The facility will serve as a regional center for stable isotopic analysis in the Pacific Northwest, complementing facilities at Oregon State and the University of Washington. This facility will also support undergraduate and graduate level research training in state-of-the-art stable isotopic research and methods. The University of Oregon Department of Geosciences has an admirable record of recruiting and training a large fraction of female students. The new SIRMS facility will further Departmental goals to expose underrepresented groups to geosciences research and research methods.***