| 项目编号: | 1643952
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| 项目名称: | Collaborative Research: Multi-Parameter Geophysical Constraints on Volcano Dynamics of Mt. Erebus and Ross Island, Antarctica |
| 作者: | Ronni Grapenthin
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| 承担单位: | New Mexico Institute of Mining and Technology
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| 批准年: | 2017
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| 开始日期: | 2017-03-15
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| 结束日期: | 2019-02-28
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| 资助金额: | 150940
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| 资助来源: | US-NSF
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| 项目类别: | Standard 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 - Polar
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| 英文关键词: | erebus
; ross island
; magmatic system
; gps datum
; volcano
; activity
; year
; geophysical datum
; southernmost active volcano
; project
; west antarctica
; term dynamics
; broad volcano-tectonic framework
; nontechnical abstractmount erebus volcano
; mount erebus volcano observatory workshop
; other volcano
; sea-level dynamics
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| 英文摘要: | Nontechnical Abstract
Mount Erebus volcano on Ross Island, Antarctica, is the southernmost active volcano on the planet. It provides a natural laboratory to study a volcanic system that has been in a continuous state of activity with a persistent lava lake over at least the last 40 years. Worldwide only four other volcanoes with such long-lived lava lakes exist: Erta Ale, Ethiopia; Kilauea, Hawaii; Nyiragongo, Congo; and Ambrym, Vanuatu. These volcanoes are a rare anomaly that provide a window into the underlying magmatic system and behavior. Erebus is of particular interest as it cycles through phases of very explosive activity every 20 thousand years. This project will investigate interactions between the magmatic system, the rift it is located in, and the impact of the gravitational load the volcano imposes on the underlying crust and its own magmatic system. Possible interactions between these factors may explain the changes in activity. The project will analyze geophysical data that have been collected at Erebus over at least the last two decades. The results of this work will be available to the public and scientific community and inform geodynamic models in this region. The project funds an early-career scientist and a graduate student at New Mexico Tech and contributes to the development of the next generation of scientists.
Technical Abstract
The proposed work targets scientific questions recently formulated by the community during the 2016 NSF-sponsored Scientific Drivers and Future of Mount Erebus Volcano Observatory workshop. The location and geometry of the magmatic plumbing from vent to lower crust system remain poorly constrained, particularly below 1 km depth. The style and causes for changes in volcanic and magmatic activity over the short term (minutes to hours) and on the decadal scale remains enigmatic. Two decades of campaign and continuous GPS data on Ross Island will inform about the longer term dynamics of both, Ross Island growing within the Terror Rift, and Erebus? deeper magmatic system. This project will organize and analyze all existing GPS data for Ross Island, and interpret any anomalies in the resulting time series. These activities require organization, consistent processing and interpretation/modeling of the existing ~20 years of GPS data, which include campaign, continuous, and high-rate GPS observations. We will generate these position time series in a consistent local reference frame and make the results, including models of transient deformation available to the community. Volcanic, tectonic and isostatic adjustment related deformation will be modeled to place Erebus in a broad volcano-tectonic framework of West Antarctica. During the data analysis phase, the utility of existing GPS data for reflection studies of snow and sea-level dynamics will also be evaluated. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/90427
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Ronni Grapenthin. Collaborative Research: Multi-Parameter Geophysical Constraints on Volcano Dynamics of Mt. Erebus and Ross Island, Antarctica. 2017-01-01.
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