Acquisition of a multi-collector, inductively coupled plasma mass spectrometer (MC-ICP-MS)

购买多接收器电感耦合等离子体质谱仪 (MC-ICP-MS)

• 批准号: 1028462
• 负责人: Clark Johnson
• 金额: $ 42.94万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-12-15 至 2013-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1028462&HistoricalAwards=false
• 关键词: Acquisition; multi; collector; inductively; coupled

An Inductively Coupled Plasma Mass Spectrometer (MC-ICP-MS) will be installed in the Radiogenic Isotope Laboratory at the University of Wisconsin - Madison. The new MC-ICP-MS will replace an existing instrument that was installed in 1999, and will be coupled to a recently installed femtosecond laser ablation system. The new instrumentation will be used for research in three areas of isotope geochemistry: metal stable isotopes, U-series geochronology, and long-lived isotope geochronology and radiogenic tracers. Work in stable metal isotopes will include studies involving Mg, Si, and Fe, with a major effort expended on experimental determination of isotope fractionation factors. In addition, a significant effort will involve in situ isotopic analysis of Archean and Proterozoic banded iron formations, black shales, and carbonates. Research in U-series geochronology will be directed towards understanding the evolution of 100 kyr volcanic systems, where 238U-230Th ages are compared with 40Ar/39Ar ages, as well as extensive geochemical data, including Sr, Nd, Pb, and Hf isotopes. A new initiative on caldera complexes will provide comparisons with earlier work on central vent/composite volcanoes. Work on long-lived geochronological systems and isotope tracers, including U-Th-Pb, Lu-Hf, and Rb-Sr, will include in situ U-Pb/Lu-Hf zircon studies by femtosecond laser ablation, coupled with O and Li isotope studies of the same materials; projects will include Hadean zircons, as well as Cretaceous zircons that are part of a broader timescale initiative. In addition, in situ Sr and Pb isotope analyses of feldspars by femtosecond laser ablation will be pursued, both for provenance studies, as well as volcanic evolution studies; for the former, Sr and Pb analysis will be coupled to single-grain 40Ar/39Ar analysis. The new instrumentation will be used by students and post-docs at UW-Madison, and will also host visiting scientists from the Midwest and other areas.

威斯康星大学麦迪逊分校的放射性同位素实验室将安装一台电感耦合等离子体质谱仪 (MC-ICP-MS)。 新的 MC-ICP-MS 将取代 1999 年安装的现有仪器，并将与最近安装的飞秒激光烧蚀系统耦合。 新仪器将用于同位素地球化学三个领域的研究：金属稳定同位素、U系列地质年代学、长寿命同位素地质年代学和放射性示踪剂。 稳定金属同位素方面的工作将包括涉及镁、硅和铁的研究，其中主要精力花在同位素分馏因子的实验测定上。 此外，一项重大工作将涉及太古代和元古代带状铁地层、黑色页岩和碳酸盐的原位同位素分析。 U 系列地质年代学研究将旨在了解 100 kyr 火山系统的演化，其中 238U-230Th 年龄与 40Ar/39Ar 年龄进行比较，以及广泛的地球化学数据，包括 Sr、Nd、Pb 和 Hf 同位素。 关于火山口复合体的一项新举措将与早期关于中央喷口/复合火山的工作进行比较。 关于长寿命地质年代学系统和同位素示踪剂（包括 U-Th-Pb、Lu-Hf 和 Rb-Sr）的工作将包括通过飞秒激光烧蚀以及 O 和 Li 进行原位 U-Pb/Lu-Hf 锆石研究相同材料的同位素研究；项目将包括冥古宙锆石以及白垩纪锆石，它们是更广泛时间尺度计划的一部分。 此外，还将通过飞秒激光烧蚀对长石进行原位锶和铅同位素分析，既用于来源研究，也用于火山演化研究；对于前者，Sr 和 Pb 分析将与单晶 40Ar/39Ar 分析相结合。 新仪器将供威斯康辛大学麦迪逊分校的学生和博士后使用，还将接待来自中西部和其他地区的访问科学家。