Hafnium Isotope Constraints on the Source Characteristics of Normal Mid-ocean Ridge Basalts

铪同位素对正常洋中脊玄武岩来源特征的约束

• 批准号: 0648484
• 负责人: Vincent Salters
• 金额: $ 28.9万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-01 至 2012-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0648484&HistoricalAwards=false
• 关键词: Hafnium; Isotope; Constraints; Source; Characteristics

Intellectual Merit: This research seeks to obtain high-spatial resolution, high-precision isotopic data to address fundamental questions on the generation of mid-ocean ridge basalts. Two competing hypotheses for the generation of ocean crust will be tested on the basis that the two models predict different distributions of low-degree melts along the ridge. Because basalt chemistry is strongly dependent on the degree of melting this project looks at trace elements and key indicator isotopes such as Hafnium, Neodymium, Lead, and Strontium to determine which model is correct. The case study from which samples have already been obtained is the East Pacific Rise between 6oN and 19oN. Results will be compared to data from the Mid-Atlantic Ridge. Chemical analyses will be made using the new ICPMS that was recently installed at Florida State University. Broader Impacts: This project will support a graduate student and undergraduates. It also provides core support for a multi-user laser ICPMS facility which has a focus on training students. High school teachers will also be exposed to this research through an ongoing summer program to expose them and their students to scientific discovery.

知识分子的优点：这项研究旨在获得高空间分辨率，高精度同位素数据，以解决有关中海脊玄武岩产生的基本问题。 将测试两个模型的两个竞争假设，即两种模型预测沿山脊沿线的低度熔体的不同分布。 因为玄武岩化学强烈依赖于熔化的程度，该项目着眼于痕量元素和关键指标同位素，例如hafnium，neodymium，铅和锶，以确定哪种模型是正确的。 已经获得样品的案例研究是东太平洋在6on和19on之间的上升。结果将与大西洋中部山脊的数据进行比较。 化学分析将使用最近在佛罗里达州立大学安装的新ICPM进行。 更广泛的影响：该项目将支持研究生和本科生。 它还为多用户激光ICPMS设施提供核心支持，该设施专注于培训学生。 高中教师还将通过正在进行的夏季计划接触这项研究，以使他们及其学生接触科学发现。