Acquisition of a Sulfur Isotope-Ratio Mass Spectrometer

小行星9726264 该补助金为印第安纳州大学提供部分支持，用于购买带有外围样品引入和气体处理装置的稳定同位素比质谱仪（SIRMS）。 SIRMS将致力于硫同位素分析，取代19年的。印第安纳州大学目前使用的旧的核素质谱仪。这一新设施将由来自印第安纳布卢明顿、伊利诺伊大学香槟分校和密苏里州-哥伦比亚大学的研究人员共享。 最先进的系统可靠性监测系统可以分析比目前可能的核素分析量小得多的气体样品（1微摩尔），从而大大扩大了这一区域集团的分析可能性。 该设施将为经济地质学、古海洋学、地球化学和硫同位素系统学等广泛研究提供数据。 具体研究将包括对中大陆裂谷系统内热液矿体成因的硫同位素调查，对作为缺氧海洋沉积物成岩过程替代物的有机化合物进行物种特异性硫同位素分析，表征切萨皮克湾沉积物孔隙水系统中硫的地球化学途径，对缺氧黑海沉积物中黄铁矿形成的古环境研究，硫盐体系中硫同位素分馏的实验研究。 ***

9726264 Ripley This grant provides partial support to Indiana University for the costs of acquiring a stable isotope ratio mass spectrometer (SIRMS) with peripheral sample introduction and gas handling devices. The SIRMS will be dedicated to sulfur isotopic analyses, replacing the 19-yr. old Nuclide mass spectrometer currently operated at Indiana University. This new facility will be shared by researchers from Indiana-Bloomington, the University of Illinois at Champaign-Urbana and the University of Missouri- Columbia. State-of-the-art SIRMS allow analyses of much smaller gas samples ( 1 micromole) than currently possible on the Nuclide, thus greatly expanding the analytical possibilities for this regional group. This facility will provide data for a wide range of studies in economic geology, paleoceanography, biogeochemistry and sulfur isotope systematics. Specific studies will include sulfur isotopic investigations of the genesis of hydrothermal ore bodies within the Midcontinent Rift system, species specific sulfur isotopic analyses of organic compounds as proxies of diagenetic processes in anoxic marine sediments, characterization of the biogeochemical pathways of sulfur in Chesapeake Bay sediment pore-water systems, paleoenvironmental studies of pyrite formation in anoxic Black Sea sediments, and experimental studies of sulfur isotope fractionation in sulfosalt systems. ***