MRI: Acquisition of a Multi-collector Inductively-coupled Plasma Mass Spectrometer for Research and Education in the Earth and Environmental Sciences

MRI：购买多接收器电感耦合等离子体质谱仪，用于地球和环境科学的研究和教育

• 批准号: 1337693
• 负责人: Richard Edwards
• 金额: $ 89.49万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1337693&HistoricalAwards=false
• 关键词: MRI; Acquisition; Multi; collector; Inductively

The principal investigators will purchase a new instrument (a mass spectrometer) that they will use for two main purposes. They will perform chemical analyses on cave deposits collected from caves in North America, South America, and Eurasia. The analyses will provide information about the climate history at each of the cave sites. The climate records will provide us with an idea of the extent of natural climate change, how much, how rapid, how extensive geographically. They will also help us to understand the causes of natural climate change. The principal investigators will also use the new mass spectrometer to develop capabilities for more sensitive and precise measurements of trace amounts of uranium present naturally in seawater. These measurements will provide insight into how rapidly the ocean circulates and information about the chemical cycles of carbon and uranium in the ocean. To the extent that this project furthers our knowledge of the character of past climate change and our understanding of the causes of climate change, it is of broad societal value. This project will also stimulate the already extensive collaboration among hundreds of scientists nationally and internationally with the University of Minnesota group and contribute to the training of the next generation of Earth scientists.

主要研究人员将购买一台新仪器（质谱仪），他们将用于两个主要目的。 他们将对从北美、南美和欧亚大陆的洞穴中收集的洞穴沉积物进行化学分析。这些分析将提供有关每个洞穴遗址气候历史的信息。 气候记录将为我们提供自然气候变化程度的概念，多少，多快，地理范围有多广。 它们还将帮助我们了解自然气候变化的原因。 主要研究人员还将使用新的质谱仪开发更灵敏和精确测量海水中天然存在的痕量铀的能力。 这些测量将提供有关海洋循环速度的见解以及有关海洋中碳和铀化学循环的信息。 该项目增进了我们对过去气候变化特征的了解，加深了我们对气候变化原因的理解，因此具有广泛的社会价值。该项目还将促进国内和国际上数百名科学家与明尼苏达大学小组的广泛合作，并有助于培训下一代地球科学家。