Collaborative Research: P2C2--Tracking Long-Term Glacial-Interglacial Wind Pattern Variability in Central Asia Using Geochemical Analysis of Aerosol Derived Detritus

合作研究：P2C2——利用气溶胶衍生碎屑的地球化学分析来追踪中亚的长期冰期-间冰期风型变化

• 批准号: 1203427
• 负责人: Alexander Pullen
• 金额: $ 18.96万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-06-01 至 2016-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1203427&HistoricalAwards=false
• 关键词: Collaborative; Research; P2C2; Tracking; Long

This is a project to reconstruct the position of the winds, the patterns of the circulation and the source regions for the dust in central and eastern Asia during the Quaternary, the last 2.5 million years. The researchers will employ a novel technique of "fingerprinting" the chemical composition of the dust found in wind-derived sediments as well as in a variety of potential upstream source regions. The chemical characterization will be made using laser ablation mass spectrometry and the measurements will include U/Pb dating, trace metal measurements, and Hf (hafnium) isotope variability to determine source regions for the dust. The approach - using laser ablation mass spectrometry on individual zircon grains - is likely to provide unprecedented chemical information about the minerals and the rapid rate of sample analysis will produce strong a strong statistical basis for evaluating changes in grain chemistry and source region.The broader impacts include: 1) application of a novel, new approach for characterizing the chemistry of the dust grains; 2) support for graduate students and undergraduates at two universities to participate in the research; 3) support for a new researcher embarking on an academic career; and 4) a strong element of international collaboration between the Institute of Tibetan Research in China and two universities in the United States.

这是一个项目，以重建风的位置，环流的模式和来源地区的尘埃在亚洲中部和东部在第四纪，过去250万年。 研究人员将采用一种新的技术，对在风源沉积物以及各种潜在上游源区中发现的灰尘的化学成分进行“指纹”。 将使用激光烧蚀质谱法进行化学表征，测量将包括U/Pb测年、痕量金属测量和Hf（铪）同位素变异性，以确定尘埃的源区。 这种方法--对单个锆石颗粒进行激光烧蚀质谱分析--很可能提供有关矿物的前所未有的化学信息，而且样品分析的快速速度将为评估颗粒化学和源区的变化提供强有力的统计基础。更广泛的影响包括：1）应用一种新颖的新方法来表征尘埃颗粒的化学性质; 2）支持两所大学的研究生和本科生参与研究; 3）支持一名新的研究人员开始学术生涯; 4）中国西藏研究所与美国两所大学之间的国际合作。