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DOI | 10.1038/s41561-019-0505-5 |
Drainage of a deep magma reservoir near Mayotte inferred from seismicity and deformation | |
Cesca, Simone1; Letort, Jean2; Razafindrakoto, Hoby N. T.1; Heimann, Sebastian1; Rivalta, Eleonora1; Isken, Marius P.3; Nikkhoo, Mehdi1; Passarelli, Luigi4; Petersen, Gesa M.1,5; Cotton, Fabrice1,5; Dahm, Torsten1,5 | |
2020-01-06 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2020 |
卷号 | 13期号:1页码:87-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; France; Saudi Arabia |
英文摘要 | The dynamics of magma deep in the Earth's crust are difficult to capture by geophysical monitoring. Since May 2018, a seismically quiet area offshore of Mayotte in the western Indian Ocean has been affected by complex seismic activity, including long-duration, very-long-period signals detected globally. Global Navigation Satellite System stations on Mayotte have also recorded a large surface deflation offshore. Here we analyse regional and global seismic and deformation data to provide a one-year-long detailed picture of a deep, rare magmatic process. We identify about 7,000 volcano-tectonic earthquakes and 407 very-long-period seismic signals. Early earthquakes migrated upward in response to a magmatic dyke propagating from Moho depth to the surface, whereas later events marked the progressive failure of the roof of a magma reservoir, triggering its resonance. An analysis of the very-long-period seismicity and deformation suggests that at least 1.3 km(3) of magma drained from a reservoir of 10 to 15 km diameter at 25 to 35 km depth. We demonstrate that such deep offshore magmatic activity can be captured without any on-site monitoring. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000511618700019 |
WOS关键词 | WESTERN INDIAN-OCEAN ; DAVIE FRACTURE-ZONE ; COMORES ARCHIPELAGO ; CALDERA FORMATION ; VOLCANO ; MADAGASCAR ; GONDWANA ; DIKE ; RECONSTRUCTION ; MECHANISMS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249420 |
专题 | 地球科学 气候变化 |
作者单位 | 1.GFZ German Res Ctr Geosci, Potsdam, Germany; 2.Univ Paul Sabatier, Observ Midi Pyrenees, CNRS, IRAP,UMR 5277, Toulouse, France; 3.Univ Kiel, Kiel, Germany; 4.KAUST, Thuwal, Saudi Arabia; 5.Univ Potsdam, Potsdam, Germany |
推荐引用方式 GB/T 7714 | Cesca, Simone,Letort, Jean,Razafindrakoto, Hoby N. T.,et al. Drainage of a deep magma reservoir near Mayotte inferred from seismicity and deformation[J]. NATURE GEOSCIENCE,2020,13(1):87-+. |
APA | Cesca, Simone.,Letort, Jean.,Razafindrakoto, Hoby N. T..,Heimann, Sebastian.,Rivalta, Eleonora.,...&Dahm, Torsten.(2020).Drainage of a deep magma reservoir near Mayotte inferred from seismicity and deformation.NATURE GEOSCIENCE,13(1),87-+. |
MLA | Cesca, Simone,et al."Drainage of a deep magma reservoir near Mayotte inferred from seismicity and deformation".NATURE GEOSCIENCE 13.1(2020):87-+. |
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