Natural History Museum, Volcano Petrology Group, Cromwell Road, SW7 5BD, London, UK.
Department of Earth Sciences, Sapienza - University of Rome, P.Le Aldo Moro 5, 00185, Roma, Italy.
Nat Commun. 2022 Dec 13;13(1):7717. doi: 10.1038/s41467-022-35405-z.
Open-conduit basaltic volcanoes can be characterised by sudden large explosive events (paroxysms) that interrupt normal effusive and mild explosive activity. In June-August 2019, one major explosion and two paroxysms occurred at Stromboli volcano (Italy) within only 64 days. Here, via a multifaceted approach using clinopyroxene, we show arrival of mafic recharges up to a few days before the onset of these events and their effects on the eruption pattern at Stromboli, as a prime example of a persistently active, open-conduit basaltic volcano. Our data indicate a rejuvenated Stromboli plumbing system where the extant crystal mush is efficiently permeated by recharge magmas with minimum remobilisation promoting a direct linkage between the deeper and the shallow reservoirs that sustains the currently observed larger variability of eruptive behaviour. Our approach provides vital insights into magma dynamics and their effects on monitoring signals demonstrating the power of petrological studies in interpreting patterns of surficial activity.
开放式通道玄武岩火山的特征是突然发生的大型爆发事件（爆发），这些事件会中断正常的喷发和轻度爆发活动。在 2019 年 6 月至 8 月期间，意大利斯特龙博利火山在短短 64 天内发生了一次重大爆炸和两次爆发。在这里，通过使用斜方辉石的多方面方法，我们表明在这些事件发生之前几天就已经有了基性补给物的到来，以及它们对斯特龙博利火山喷发模式的影响，斯特龙博利火山是一个持续活跃的开放式通道玄武岩火山的典型例子。我们的数据表明，斯特龙博利的管道系统已经恢复活力，现存的晶体糊状物被补给岩浆有效地渗透，最小程度地重新移动，从而促进了深部和浅部储层之间的直接联系，维持了目前观察到的更大的喷发行为变化性。我们的方法为岩浆动力学及其对监测信号的影响提供了重要的见解，展示了岩石学研究在解释表面活动模式方面的力量。
