RUI: An Investigation of the Mauna Kea Magma Plumbing System: Insights From Mineral Composition From the HSDP Core

RUI：对莫纳克亚岩浆管道系统的调查：HSDP 核心矿物成分的见解

• 批准号: 0337345
• 负责人: Keith Putirka
• 金额: $ 10.57万
• 依托单位: California State University-Fresno Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0337345&HistoricalAwards=false
• 关键词: RUI; Investigation; Mauna; Kea; Magma

PutirkaEAR-0337345Phenocrysts provide an archive of the pressures and temperatures at which magmas stagnate and evolve and the liquids from which they crystallized. Phenocryst compositions can thus be used to create a cross section of a magma conduit system, and thereby test hypotheses regarding magma transport and liquid evolution. Clinopyroxene phenocrysts, in particular, are extremely useful in deciphering, for instance, if the solubility of jadeite is sensitive to pressure. The funds provided by this proposal will support a two-year study of clinopyroxene compositions from the Hawaii Scientific Drilling Project (HSDP2), with the goal of understanding magma transport and liquid evolution at Mauna Kea, Hawaii. Since the HSDP core provides a unique time-integrated view of the Mauna Kea magma plumbing system, the PI and his students will examine whether the conditions of crystallization exhibit temporal patterns. Not only will this view potentially shed light on the evolution of a magma conduit system, but phenocryst compositions might also allow a test of the extent to which the upwelling plume is compositionally or thermally zoned.Both undergraduate and graduate students at California State University, Fresno, will perform much of the data analysis for this project. The role of undergraduates is very important, as experience has shown that students are particularly motivated when they are part of a larger research program. For the present study, a graduate and several undergraduate students will take the lead in the collection and analysis of the mineral chemistry data. The graduate student will be assigned the somewhat more challenging task of reconstructing liquid compositions, while a team of undergraduates will conduct the estimation of P-T conditions. All students will share in the construction of a model for the Mauna Kea magma plumbing system and with the oral presentation and publication efforts.

PutirkaEAR-0337345斑晶提供了岩浆停滞和演化的压力和温度以及它们结晶的液体的档案。因此，斑晶组合物可用于创建岩浆管道系统的横截面，从而测试有关岩浆输送和液体演化的假设。尤其是单斜辉石斑晶，在破译方面尤其有用，例如，如果硬玉的溶解度对压力敏感的话。该提案提供的资金将支持对夏威夷科学钻探项目 (HSDP2) 的单斜辉石成分进行为期两年的研究，目的是了解夏威夷莫纳克亚山的岩浆输送和液体演化。由于 HSDP 核心提供了莫纳克亚山岩浆管道系统的独特时间积分视图，因此 PI 和他的学生将检查结晶条件是否表现出时间模式。这一观点不仅有可能揭示岩浆管道系统的演化，而且斑晶成分也可能有助于测试上升流羽流的成分或热分区程度。加州州立大学弗雷斯诺分校的本科生和研究生都将为该项目进行大部分数据分析。本科生的作用非常重要，因为经验表明，当学生参与更大的研究项目时，他们的积极性特别高。在本研究中，一名研究生和几名本科生将带头收集和分析矿物化学数据。研究生将被分配更具挑战性的重建液体成分的任务，而本科生团队将进行 P-T 条件的估计。所有学生都将参与莫纳克亚岩浆管道系统模型的构建以及口头演示和出版工作。