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苯晶体提供了岩浆停滞不前的压力和温度的存档，以及它们结晶的液体。因此，可以使用苯晶组成来创建岩浆导管系统的横截面，从而检验岩浆传输和液体进化的假设。尤其是，如果玉矿的溶解度对压力敏感，则在解密方面特别有用。该提案提供的资金将支持夏威夷科学钻探项目（HSDP2）的斜pyroxene组成的两年研究，目的是了解夏威夷Mauna Kea的岩浆运输和液体进化。由于HSDP核心提供了Mauna Kea Magma管道系统的独特时间集成视图，因此PI和他的学生将检查结晶的条件是否表现出时间模式。这种观点不仅可能会阐明岩浆导管系统的演变，而且现场晶体组成也可能允许测试上升的羽流在构图或热划分上的程度。本科生的作用非常重要，因为经验表明，当学生成为更大的研究计划的一部分时，他们的动力特别有动力。对于本研究，研究生和几位本科生将领导矿物化学数据的收集和分析。研究生将被分配重建液体成分的更具挑战性的任务，而本科生团队将进行P-T条件的估计。所有学生都将分享用于Mauna Kea Magma管道系统的模型，以及口头介绍和出版工作。