CAREER: Origin and Evolution of Volatiles in Submarine and Subglacial Alkalic Magmas

职业：海底和冰下碱性岩浆中挥发物的起源和演化

• 批准号: 9702795
• 负责人: Jacqueline Dixon
• 金额: $ 40.93万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-07-15 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9702795&HistoricalAwards=false
• 关键词: CAREER; Origin; Evolution; Volatiles; Submarine

CAREER: Origin and evolution of volatiles in submarine and subglacial alkalic magmas Jacqueline Eaby Dixon, Principal Investigator, University of Miami The PI proposes to investigate the origin and evolution of volatiles in alkalic magmas from submarine and subglacial volcanoes. The goal is to better understand variations in mantle volatile contents and the role of volatiles in controlling eruption dynamics of mafic melts. Sample suites include tholeiitic and alkalic glasses from Hawaii, the Southern Australs, and subglacial volcanoes in British Columbia. Concentrations and isotopic analyses of the major volatile species (H2O and CO2) will be measured using infrared spectroscopy, manometry/mass-spectrometry, and quantitative image analysis. The education component includes introducing interdisciplinary freshman seminars to enhance the undergraduate experience; for example, combining volcanology and archeology to study the impact of volcanism on human evolution. The seminars will be linked to field trips to key locales around the Caribbean and Mexico (Miami's "back door"). Also the PI will collaborate with Dr. James Hay at Lamont-Doherty Earth Observatory (LDEO) in a program to increase use of the "web" in earth science teaching.

职业：海底和冰下碱性岩浆中挥发物的起源和演化 Jacqueline Eaby Dixon，迈阿密大学首席研究员 PI 建议研究海底和冰下火山碱性岩浆中挥发物的起源和演化。 目标是更好地了解地幔挥发物含量的变化以及挥发物在控制镁铁质熔体喷发动力学中的作用。 样品套件包括来自夏威夷、南澳大利亚和不列颠哥伦比亚省的冰下火山的拉斑斑岩玻璃和碱性玻璃。 主要挥发性物质（H2O 和 CO2）的浓度和同位素分析将使用红外光谱、测压/质谱和定量图像分析进行测量。 教育部分包括引入跨学科新生研讨会以增强本科生经验；例如，结合火山学和考古学来研究火山活动对人类进化的影响。 研讨会将与加勒比海和墨西哥（迈阿密的“后门”）周围主要地点的实地考察联系起来。 此外，PI 还将与 Lamont-Doherty 地球观测站 (LDEO) 的 James Hay 博士合作开展一项计划，以增加“网络”在地球科学教学中的使用。