Acquisition of a Multiple-Collector Inductively-Coupled Plasma Mass Spectrometer

0824967 Lapen该提案寻求资金以购买多收集器电感耦合等离子体质谱仪（MC-ICP-MS）。虽然该大学具有TIMS能力，但所要求的仪器将用于现场高精度低电离效率元素同位素比测量。靶元素为Hf、Fe、U、Th、Ta和W）。PI正在考虑Thermo Neptune或NuPlasma HR，这两种器械目前在性能和价格方面具有可比性。PI目前拥有CETAC LSX-213激光烧蚀系统和专用的500级洁净实验室。许多基础地球科学和宇宙化学问题依赖于精确的、高分辨率的元素同位素比测量。新的MC-ICP-MS要解决的主要研究问题包括：1）了解地幔演化。将结合玄武岩和地幔岩的Sm-Nd、Lu-Hf和Re-Os分析，研究非火山裂陷边缘和超低洋中脊的岩石圈增生过程。锇，锶，钕，铪同位素分析将阐明洋中脊地幔熔融过程中发生的。2)行星地质学？月球玄武岩和SNC陨石将通过Lu-Hf和Sm-Nd分析来了解早期月球和火星的分异过程。根据高压和超高压岩石的Lu-Hf和Sm-Nd年代学研究壳幔相互作用、弧岩浆作用和造山带动力学。将通过追踪与炼油厂作业有关的同位素和元素指纹来评估石化加工影响（大气输入）。新的仪器将被安置在一个300平方英尺的无尘室已经分配的大学。该大学将在3年内每年提供5万美元，以支持全职技术人员。该大学还资助和工作人员的机器和电子商店。首席PI沿着技术人员负责日常维护、仪器操作和学生/用户培训。将成立一个由首席PI和一名外部科学家组成的日程安排委员会。仪器时间将由委员会优先考虑。目前在UH有充足的制备实验室/设施。该仪器将代表大休斯顿地区唯一的同类仪器。学生将通过使用仪器进行论文研究，从课程水平纳入。将通过国家基金会赞助的项目鼓励少数群体，为代表性不足的人口提供机会。 ***

0824967LapenThis proposal seeks funding to purchase a multi-collector, inductively coupled plasma mass spectrometer (MC-ICP-MS). While the University has TIMS capabilities, the requested instrument will be used for in situ and high-precision low ionization efficiency elemental isotope ratio measurements. Target elements are Hf, Fe, U, Th, Ta, and W). PIs are considering either a Thermo Neptune or NuPlasma HR which currently are comparable in performance and price. The PIs currently have a CETAC LSX-213 laser ablation system and dedicated Class 500 clean laboratory. Many fundamental geoscience and cosmochemical questions rely on precise, high-resolution elemental isotope ratio measurements. The main research questions to be addressed with the new MC-ICP-MS involve 1) Understanding mantle evolution. Lithospheric accretion at non-volcanic rifted margins and at ultraslow mid-ocean ridges processes will be studied by combined basalt and mantle rock Sm-Nd, Lu-Hf and Re-Os analyses. Os, Sr, Nd, and Hf isotope analyses will elucidate processes occurring during mid-ocean ridge mantle melting. 2) Planetary geology ? lunar basalts and SNC meteorites will be used to understand early Moon and Mars differentiation processes through Lu-Hf and Sm-Nd analyses, 3) Crustal evolution during orogeny ? crust-mantle interactions, arc magmatism, and mountain belt dynamics will be studied in terms of Lu-Hf and Sm-Nd geochronology of high- and ultrahigh-pressure rocks, 4) Environmental geology ? petrochemical processing impacts (atmospheric inputs) will be assessed by tracking isotopic and elemental fingerprints related to refinery operations. The new instrument will be housed in a 300 ft2 clean room already allocated by the University. The University will contribute $50K per year for 3 years to support a full-time technician. The University also funds and staffs machine and electronics shops. The lead PIs along with the technician will be responsible for day-to-day maintenance, instrument operation and student/user training. A scheduling committee will be created with the lead PIs and an outside scientist. Instrument time will be prioritized by committee. Ample preparation laboratories/facilities currently exist at UH. The instrument will represent the only on of its kind in the greater Houston area. Students will be incorporated from coursework level through using the instrumentation for dissertation research. Minorities will be encouraged through NSF-sponsored projects providing opportunities for underrepresented populations. ***