Acquisition of Instrumentation for Geochemistry at Caltech

9903699 EilerThis grant provides partial support for the costs of acquiring a gas-source，isotope-ratio mass spectrometer and Excimer laser ablation system for in situ sampling of geological materials，both were used in the Geological and Planetary Sciences at the加州理工学院的地球化学实验室. PI John Eiler最近开始任命加州理工学院的教授，这笔赠款支持的仪器将成为他监督的实验室的核心。 除了Eiler，支持的仪器将用于包括加州理工学院其他几个教师在内的合作（包括Adkins博士、Blake博士、法利博士、Rossman博士、Stolper博士和Yung博士）和Martin Shoell博士（Chevron公司）。所支持的仪器将为PI正在进行的稳定同位素地球化学研究提供新的分析能力，并为开发新的研究项目提供机会;此外，它们将成为加州理工学院一个更大的地球化学实验室的关键部件，该实验室已经集成了惰性气体和ICP质谱仪。 PI将使用支持的工具进行以下研究领域：1）地幔地球化学，包括地幔矿物和地幔源熔体的氧、氢同位素和微量元素地球化学; 2）低温挥发分同位素分配实验研究，为研究地球高层大气稳定同位素地球化学奠定基础;火星和木星卫星的大气层; 3）陨石和陆地沉积物中有机物的化合物特定氢同位素分析。 通过与其他加州理工学院科学家合作并使用支持的仪器进行的其他研究包括：1）大气N2 O的氮同位素地球化学研究，2）U-Th-He热年代学，3）城市空气中CO2的碳同位素地球化学，以及4）深海珊瑚的氧和碳同位素地球化学。

9903699EilerThis grant provides partial support for the costs of acquiring a gas-source, isotope-ratio mass spectrometer and Excimer laser ablation system for in situ sampling of geological materials, both of which will be used in the geochemistry laboratory in the Division of Geological and Planetary Sciences at the California Institute of Technology. The PI, John Eiler, recently began an appointment to the professorial faculty at Caltech and the instruments supported by this grant will form the core to the laboratories he supervises. In addition to Eiler, the supported instruments will be used in collaborations including several other faculty at Caltech (including Drs. Adkins, Blake, Farley, Rossman, Stolper, and Yung) and with Dr. Martin Shoell (Chevron).The supported instruments will provide new analytical capabilities for the PI's ongoing research in stable isotope geochemistry and opportunities for development of new research programs; in addition, they will be key components to a larger geochemistry laboratory integrating noble-gas and ICP mass spectrometers already at Caltech. The following areas of research will be pursued by the PI using the supported instruments: 1) Mantle geochemistry, including the oxygen- and hydrogen-isotope and trace-element geochemistry of mantle minerals and mantle derived melts, 2) Experimental studies of isotope partitioning among low-temperature volatiles, to serve as a basis for studying the stable isotope geochemistry of the Earth's upper atmosphere, and the atmospheres of Mars and the Jovian satellites, and 3) compound-specific hydrogen isotope analysis of organic matter in meteorites and terrestrial sediments. Additional research to be conducted through collaboration with other Caltech scientists and using the supported instruments includes: 1) study of the nitrogen-isotope geochemistry of atmospheric N2O, 2) U-Th-He thermochronometry, 3) the carbon isotope geochemistry of CO2 in urban air masses, and 4) oxygen and carbon isotope geochemistry of deep-sea corals.***