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| DOI | 10.1016/j.epsl.2021.117113 |
| Fast melt expulsion from crystal-rich mushes via induced anisotropic permeability | |
| Liu B.; Lee C.-T. | |
| 发表日期 | 2021 |
| ISSN | 0012821X |
| 卷号 | 571 |
| 英文摘要 | Catastrophic eruptions of rhyolitic super volcanoes require large volumes of silicic magma to be extracted from a crystal-rich mush at high rates. However, fast melt extraction is thought to be difficult because of the low permeability of mushes and the high viscosities of silicic melts. Here, we show that induced ephemeral high permeability pathways in the mush may be critical. During uniaxial compression of the mush, driven by the impingement of recharging magmas from below, melt within the mush can be redistributed preferentially into vertical melt pockets. This redistribution of melt can increase vertical permeability by a factor of 10-100 times, which leads to rapid expulsion of melt. As melt is expelled, the permeability rapidly declines. The end result is a fast, short-lived pulse of melt extraction that can grow a 1 km thick silicic magma reservoir in 10 kyr. Our analysis shows how the incursion of deep-seated magmas into the base of a crystal-rich mush in the crust can trigger the expulsion of silicic melts that may lead to an eruption. © 2021 Elsevier B.V. |
| 关键词 | anisotropic permeabilityconsolidationlarge silicic eruptionsmelt extractionmelt texturerecharge |
| 英文关键词 | Consolidation; Extraction; Reservoirs (water); Textures; Anisotropic permeability; High rate; Large silicic eruption; Large volumes; Melt expulsion; Melt extraction; Melt textures; Recharge; Rhyolitic; Silicic magmas; Anisotropy |
| 语种 | 英语 |
| 来源期刊 | Earth and Planetary Science Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/203189 |
| 作者单位 | Department of Earth, Environmental & Planetary Sciences, Rice University, United States |
| 推荐引用方式 GB/T 7714 | Liu B.,Lee C.-T.. Fast melt expulsion from crystal-rich mushes via induced anisotropic permeability[J],2021,571. |
| APA | Liu B.,&Lee C.-T..(2021).Fast melt expulsion from crystal-rich mushes via induced anisotropic permeability.Earth and Planetary Science Letters,571. |
| MLA | Liu B.,et al."Fast melt expulsion from crystal-rich mushes via induced anisotropic permeability".Earth and Planetary Science Letters 571(2021). |
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