Geochemical and Isotopic Study of Central American Volcanoes

中美洲火山的地球化学和同位素研究

• 批准号: 8803546
• 负责人: Mark Feigenson
• 金额: $ 10.5万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803546&HistoricalAwards=false
• 关键词: Geochemical; Isotopic; Study; Central; American

This project by Feigenson and Carr will continue work on the volcanic rocks of Central America. Although numerous inroads have been made towards understanding arc magmagenesis, and an extensive sample set collected and analyzed, several important aspects of arc petrogenesis remain to be developed. Volcanism in Central America needs to be understood in terms of a workable geophysical model. A recent development in this area can be tested with data from this arc, and perhaps applied to convergent margin petrogenesis in general. Isotopic and trace element data collected to date have documented the important role of a subducted slab component in the source of Central American lavas. Other potential components need to be carefully characterized to understand their importance. Finally, a comprehensive suite of arc lavas analyzed for major and trace elements and radiogenic and stable isotopes will be vital in understanding intra-arc variations, as well as providing an important arc reference suite to be used by other researchers for world-wide comparisons.

费根森和卡尔的这个项目将继续研究中美洲的火山岩。尽管在理解弧磁作用方面取得了许多进展，并收集和分析了大量的样本集，但弧岩成因的几个重要方面仍有待发展。中美洲的火山活动需要用可行的地球物理模型来理解。这一领域的最新发展可以用来自这条弧线的数据来检验，并可能适用于总体上的汇聚边缘成岩作用。迄今收集的同位素和微量元素数据证明了俯冲板岩成分在中美洲熔岩来源中的重要作用。需要仔细描述其他潜在组件的特征，以了解它们的重要性。最后，对一套全面的弧熔岩进行常量和微量元素以及放射性和稳定同位素的分析，将对了解弧内变化以及提供重要的弧参考套件至关重要，供其他研究人员用于世界范围的比较。