Xenoliths of Mauna Kea, Hawaii: Interpreting an Igneous Cumulate Environment Through Whole-Rock and Mineral Major- and Trace-Elements

夏威夷莫纳克亚火山捕虏体：通过全岩和矿物主量元素和微量元素解释火成岩堆积环境

• 批准号: 9104927
• 负责人: Ronald Fodor
• 金额: $ 5.26万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-15 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9104927&HistoricalAwards=false
• 关键词: Xenoliths; Mauna; Kea; Hawaii; Interpreting

This proposal addresses the detailed examination of cumulate- textured and layered igneous rocks from a geologic environment not yet thoroughly evaluated in terms of cumulate processes. This project plans a comprehensive study of hundreds of Mauna Kea xenoliths from many cinder cones. The PIs will apply petrography, electron microprobe, ion microprobe, XRF, INA, and O-isotopes to develop models for crustal/cumulate processes, compositions of liquids that produced the cumulate rocks, relationships among the different rock types, and the attending crystal/crystal and crystal/melt fractionations for a closed igneous environment. The results should contribute to a better understanding of cumulate processes, and constrain future crystallization models for Hawaiian basaltic magmas.

该提案解决了对来自尚未根据堆积过程进行彻底评估的地质环境中的堆积结构和层状火成岩的详细检查。 该项目计划对来自许多煤渣锥的数百个莫纳克亚捕虏体进行全面研究。 PI 将应用岩相学、电子微探针、离子微探针、XRF、INA 和 O 同位素来开发地壳/堆积过程、产生堆积岩石的液体成分、不同岩石类型之间的关系以及参与的晶体/晶体的模型。用于封闭火成岩环境的晶体和晶体/熔体分馏。 研究结果应有助于更好地理解堆积过程，并限制夏威夷玄武岩浆未来的结晶模型。