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.

该项目旨在重建近250万年第四纪中亚和东亚的风位置、环流模式和沙尘源区。 研究人员将采用一种新技术，对风源沉积物以及各种潜在的上游源区中发现的灰尘的化学成分进行“指纹识别”。 化学表征将使用激光烧蚀质谱法进行，测量将包括 U/Pb 测年、痕量金属测量和 Hf（铪）同位素变异性，以确定灰尘的来源区域。 该方法 - 对单个锆石颗粒使用激光烧蚀质谱 - 可能会提供有关矿物的前所未有的化学信息，并且快速的样品分析将为评估颗粒化学和来源区域的变化提供强有力的统计基础。更广泛的影响包括：1）应用一种新颖的方法来表征灰尘颗粒的化学特征； 2）支持两所大学的研究生和本科生参与研究； 3) 支持新研究人员踏上学术生涯； 4）中国西藏研究所与美国两所大学之间的强有力的国际合作。