火山-构造地震活动性下马约特深部岩浆管道系统及其时空演化

IF 2.5 Q2 Earth and Planetary Sciences
Aude Lavayssière, Lise Retailleau
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引用次数: 0

摘要

自2018年以来,莫桑比克海峡的马约特岛近海发生了意想不到的地震。它们与Fani maor海底火山的喷发有关。使用最近开发的综合自动目录,我们探索了2019年3月至2021年3月之间两年的火山构造(VT)地震活动,并使用约33,000个事件详细分析了岩浆管道系统的活动结构。VT地震突出了三个岩浆储存带和两个以前从未观测到的地震管道。地震活动的时间演变揭示了2020年3月可能发生的政权变化。以前,管道系统对岩浆从深层储层流出和岩浆向海底迁移做出反应,而现在,它对新的流体迁移和系统原有断层上应力负荷的重新分配做出反应。这一分析是更好地了解全球长期火山活动的关键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Capturing Mayotte's deep magmatic plumbing system and its spatiotemporal evolution with volcano-tectonic seismicity
Since 2018 an unexpected number of earthquakes have been occurring offshore Mayotte, in the Mozambique Channel. They are linked to the eruption of the Fani Maoré submarine volcano. Using a recently-developed comprehensive automatic catalog, we explore two years of volcano-tectonic (VT) seismicity between March 2019 and March 2021 and analyse in detail the active structures of the magmatic plumbing system using ~33,000 events. The VT earthquakes highlight three magma storage zones and two aseismic conduits that had never been observed before. The temporal evolution of the seismicity reveals a probable regime change in March 2020. While before, the plumbing system reacted to the drainage of magma from a deep reservoir and to the migration of magma towards the seafloor, it is now responding to new migrations of fluids and to the redistribution of the stress-load across the system's pre-existing faults. This analysis is key to better understand long-term volcanism worldwide.
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来源期刊
Volcanica
Volcanica Earth and Planetary Sciences-Geology
CiteScore
4.40
自引率
0.00%
发文量
21
审稿时长
21 weeks
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