Facility Support: The WiscSIMS National Ion Microprobe

设施支持：WiscSIMS 国家离子微探针

• 批准号: 1355590
• 负责人: John Valley
• 金额: $ 98.1万
• 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: 2014
• 资助国家: 美国
• 起止时间: 2014-04-01 至 2018-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1355590&HistoricalAwards=false
• 关键词: Facility; Support; WiscSIMS; National; Ion

This award will renew funding of WiscSIMS as a National Facility for Stable Isotope Geochemistry. The lab has been funded by NSF as a National Facility since 2008. WiscSIMS has optimized an IMS-1280 large-radius, multi-collector ion microprobe for analysis of stable isotopes (including Li, C, N, O, Mg, Si, S, Ca, and Fe). WiscSIMS has developed unique capabilities for precise and accurate analysis of isotope ratios from small to ultra small spots. The ability to analyze small spots (1-10 micron) in situ from microscope mounts allows data to be put in context with imaging and other forms of analysis. Over 50% of instrument beam-time has been devoted to earth science and NSF-supported projects. Thus far, over 206 scientists have worked with WiscSIMS from 60 different universities and research institutes. A wide range of research is conducted at WiscSIMS. The three most common areas are Igneous and Metamorphic Petrology & Geochemistry; Cosmochemistry & Astrobiology; and Low Temperature Geochemistry & Paleoclimatology. The applications of these new in situ capabilities are potentially transformative in many areas of geochemistry. During the next three-year funding cycle, research to be conducted at WiscSIMS will help resolve long-standing paleoclimate questions, especially in proxy records of rapid climate change where conventional techniques cannot resolve short time periods. The broader impacts of this project include new applications of stable isotope geochemistry to problems of societal concern; public education; and SIMS/geochemistry training at undergraduate to post-doc level, including under-represented groups. Forty-five students, including 20 women, used WiscSIMS in thesis research during the past 3 years. WiscSIMS hosted the Hi-Res Paleoclimate Workshop in 2013 and proposes to host Hi-Res2015.

这一奖项将延长WiscSIMS作为稳定同位素地球化学国家设施的资金来源。自2008年以来，该实验室一直由NSF作为国家设施提供资金。WiscSIMS优化了IMS-1280型大半径、多收集器离子微探针，用于稳定同位素(包括Li、C、N、O、Mg、Si、S、Ca和Fe)的分析。WiscSIMS已经开发出独特的能力，可以精确和准确地分析从小到超小点的同位素比率。从显微镜底座上原位分析小斑点(1-10微米)的能力使数据能够与成像和其他形式的分析联系在一起。超过50%的仪器波束时间用于地球科学和美国国家科学基金会资助的项目。到目前为止，来自60所不同大学和研究机构的206多名科学家与WiscSIMS合作。WiscSIMS进行了广泛的研究。最常见的三个领域是火成岩和变质岩石学与地球化学；宇宙化学与天体生物学；低温地球化学与古气候学。这些新的原位能力的应用在许多地球化学领域具有潜在的变革性。在下一个三年供资周期内，WiscSIMS将进行的研究将有助于解决长期存在的古气候问题，特别是在常规技术无法解决短时间段的快速气候变化的替代记录中。该项目的更广泛影响包括稳定同位素地球化学在社会关切问题上的新应用；公共教育；以及从本科生到博士后水平的SIMS/地球化学培训，包括代表性不足的群体。在过去的三年里，包括20名女性在内的45名学生在论文研究中使用了WiscSIMS。WiscSIMS在2013年主办了高分辨率古气候研讨会，并提议主办2015年高分辨率研讨会。

项目成果

Oxygen and U-Th isotopes and the timescales of hydrothermal exchange and melting in granitoid wall rocks at Mount Mazama, Crater Lake, Oregon

俄勒冈州火山口湖马扎马山花岗岩围岩中的氧和 U-Th 同位素以及热液交换和熔化的时间尺度

• DOI: 10.1016/j.gca.2017.04.043
• 发表时间: 2017
• 期刊: Geochimica et Cosmochimica Acta
• 影响因子: 5
• 作者: Ankney, Meagan E.;Bacon, Charles R.;Valley, John W.;Beard, Brian L.;Johnson, Clark M.
• 通讯作者: Johnson, Clark M.

A 200-year archaeozoological record of Pacific cod ( Gadus macrocephalus ) life history as revealed through ion microprobe oxygen isotope ratios in otoliths

通过离子微探针耳石中的氧同位素比率揭示了太平洋鳕鱼 (Gadus macrocephalus) 200 年生活史的考古动物学记录

• DOI: 10.1016/j.jasrep.2017.06.037
• 发表时间: 2017
• 期刊: Journal of Archaeological Science: Reports
• 作者: Helser, Thomas;Kastelle, Craig;Crowell, Aron;Ushikubo, Takayuki;Orland, Ian J.;Kozdon, Reinhard;Valley, John W.
• 通讯作者: Valley, John W.