Acquisition of a Stable Isotope Ratio Mass Spectrometer for Earth Systems Science Research at the University of Nevada, Las Vegas

内华达大学拉斯维加斯分校购买稳定同位素比质谱仪用于地球系统科学研究

• 批准号: 0521196
• 负责人: Matthew Lachniet
• 金额: $ 24.85万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0521196&HistoricalAwards=false
• 关键词: Acquisition; Stable; Isotope; Ratio; Mass

0521196LachinetThis Major Research Instrumentation (MRI) program grant provides support for acquisition of a stable isotope ratio mass spectrometer, submitted by two early-career researchers in Geoscience Department at the University of Nevada Las Vegas (UNLV). NSF/MRI grant support will serve to: 1) establish the first-ever Stable Isotope Laboratory (SIL) at UNLV to facilitate generation of data for ongoing research projects, 2) foster collaborations in isotope geochemistry between the principal investigators and with other faculty across disciplines, 3) promote direct undergraduate and graduate student participation in research projects, and 4) integrate the research facility into teaching and learning at both the undergraduate and graduate levels. Research by Dr. Matthew Lachniet and graduate students investigates past rainfall histories in Central America and other areas, using the stable oxygen isotope measurements preserved in cave stalagmites, which grow continuously over time and whose age is determined by radiometric dating. These past rainfall histories will help researchers understand past variations in the El Nino/Southern Oscillation, which produces global climatic anomalies, in order to predict future recurrence intervals of El Nino events in Central American and beyond. The research by Dr. Ganqing Jiang and graduate students has investigated the isotopic evidence for "Snowball Earth" events approximately 500 to 700 million years ago, when geologic evidence suggests the possibility that the majority of the Earth was glaciated. Acquisition of a stable isotope ratio mass spectrometer at UNLV will permit in-house analysis of samples, ensuring high sample throughput. Importantly, the SIL will give undergraduate and graduate students the opportunity to learn a state-of-the-art analytical technique at UNLV, which will promote the integration of research and education into their research programs.

0521196Lachinet 这项重大研究仪器 (MRI) 计划拨款为购买稳定同位素比质谱仪提供支持，由内华达大学拉斯维加斯分校 (UNLV) 地球科学系的两名早期职业研究人员提交。 NSF/MRI 拨款支持将用于：1）在内华达大学拉斯维加斯分校建立第一个稳定同位素实验室（SIL），以促进为正在进行的研究项目生成数据，2）促进主要研究人员以及与其他跨学科教师之间在同位素地球化学方面的合作，3）促进本科生和研究生直接参与研究项目，4）将研究设施融入本科生和研究生的教学和学习中 水平。马修·拉奇尼特博士和研究生的研究利用洞穴石笋中保存的稳定氧同位素测量结果，调查了中美洲和其他地区过去的降雨历史，这些石笋随着时间的推移不断生长，其年龄是通过放射性测年确定的。这些过去的降雨历史将帮助研究人员了解造成全球气候异常的厄尔尼诺/南方涛动过去的变化，从而预测中美洲及其他地区未来厄尔尼诺事件的复发间隔。蒋干清博士和研究生的研究调查了大约 500 至 7 亿年前“雪球地球”事件的同位素证据，当时的地质证据表明地球大部分地区可能被冰川化。在内华达大学拉斯维加斯分校购买稳定同位素比质谱仪将允许对样品进行内部分析，确保高样品通量。重要的是，SIL 将为本科生和研究生提供在 UNLV 学习最先进的分析技术的机会，这将促进研究和教育融入他们的研究项目。