| 项目编号: | 1426820
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| 项目名称: | Mantle Signals in Arcs: Transport Models From Geochemistry and Seismicity |
| 作者: | Philipp Ruprecht
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| 承担单位: | Columbia University
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| 批准年: | 2014
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| 开始日期: | 2015-02-01
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| 结束日期: | 2017-01-31
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| 资助金额: | USD155140
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | magma transport
; project
; mantle wedge
; geophysical signal
; current model
; mantle source
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| 英文摘要: | The proposed study will explore magma transport rates in the middle to lower crust of convergent margin volcanoes and therefore address one of the most fundamental questions in geodynamics: How do magmas move from their source region in the mantle wedge to the surface? Furthermore, results from this study will provide first-order controls on arc magma petrogenesis, connecting the mantle source and melting process with the crustal plumbing system as well as provide insights on the aggregation of mantle-derived melts beneath arc volcanoes. The project is designed to use an integrative approach combining constraints from geochemistry, seismology, and fluid dynamics. The project will lead to a better understanding of magma transport beneath active volcanoes and improve our interpretation of monitoring dataset from such volcanoes.
Current models for magma transport in convergent margins suggest the prolonged storage and evolution of mantle-derived melts in the crust. This project will test whether a fast mode of magma transport even for large, long-lived arc magma systems exists and what conditions may facilitate such rapid ascent from the mantle to the surface. The time-integrative nature of geochemical data often precludes a direct comparison to geophysical signals that record transient processes. However, geochemical speedometers employing fast elemental diffusion in zoned magmatic crystals may bridge this observational gap and advance the application of geochemical tools to short time scale magmatic processes otherwise only investigated through geophysics. Such techniques have been successfully employed for near-surface magmatic processes; this projects aims at extending such approaches to the entire crustal magma ascent path. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95176
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Philipp Ruprecht. Mantle Signals in Arcs: Transport Models From Geochemistry and Seismicity. 2014-01-01.
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