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

这项建议涉及对堆积结构和层状火成岩的详细检查，这些火成岩来自尚未根据堆积过程进行彻底评估的地质环境。该项目计划对数百个来自许多煤渣锥的莫纳克亚捕虏体进行全面研究。PI将应用岩石学、电子探针、离子探针、XRF、INA和氧同位素来开发地壳/堆积过程、产生堆积岩的液体的组成、不同岩石类型之间的关系以及封闭火成岩环境中的晶体/晶体和晶体/熔体分馏的模型。这些结果应该有助于更好地理解堆积过程，并限制未来夏威夷玄武岩岩浆的结晶模式。

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.