Magmatic Water along the Central American Arc

中美洲弧沿线的岩浆水

• 批准号: 0839076
• 负责人: Terry Plank
• 金额: $ 4.78万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-03-01 至 2010-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0839076&HistoricalAwards=false
• 关键词: Magmatic; Water; along; Central; American

Under this award, the PI will provide a primary data set for magmatic water contents for Costa Rican volcanoes. Existing models for the Central American arc call for greater extents of water recycled to Nicaraguan than Costa Rican volcanoes. In this project the PIs will measure volatile concentrations (H2O, CO2, S, Cl, F) in olivine-hosted melt inclusions, by ion and electron probe. Another focus, partly driven by the lack of abundant olivine in Costa Rican tephra, will be the development of new techniques, one a hygrometer based on the rare earth element pattern recorded in clinopyroxenes, and the other based on the H2O concentration in clinopyroxenes. The PIs propose to provide a comprehensive dataset for water contents along the Costa Rica-Nicaragua arc sector, including approx. 20 arc volcanoes. This will enable rigorous testing against the existing geochemical gradients, as well as results of seismic imaging and the development of interpretations of the data.The study involves a female graduate student and involves a data set of interest to a broad community of MARGINS workers.

根据该奖项，PI将为哥斯达黎加火山的岩浆含水物提供一个主要数据集。中美洲弧的现有模型要求比哥斯达黎加火山回收的水回收更多。在该项目中，PIS将通过离子和电子探针测量橄榄石寄托熔体夹杂物中的挥发性浓度（H2O，CO2，S，CL，F）。另一个重点是部分是由于哥斯达黎加tephra中缺乏丰富的橄榄石的驱动，将是新技术的开发，一种是基于Clinopyroxenes中记录的稀土元素模式的湿度计，另一个基于H2O浓度的Clinopyroxenes。 PI提议为沿哥斯达黎加 - 尼卡拉瓜弧形行业的水含量提供全面的数据集，其中包括大约。 20弧火山。这将对现有的地球化学梯度以及地震成像的结果以及数据解释的发展进行严格的测试。该研究涉及一名女性研究生，并涉及广泛的保证金工人社区的兴趣数据集。