Giant offshore pumice deposit records a shallow submarine explosive eruption of ancestral Santorini
Giant offshore pumice deposit records a shallow submarine explosive eruption of ancestral Santorini
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巨大的近海浮石矿床记录了圣托里尼祖先的浅海海底爆炸性喷发
DOI:
10.1038/s43247-023-01171-z
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发表时间:
2024
影响因子:
7.9
通讯作者:
Druitt T
中科院分区:
文献类型:
--
作者:
Druitt T
Large explosive volcanic eruptions from island arcs pour pyroclastic currents into marine basins, impacting ecosystems and generating tsunamis that threaten coastal communities and infrastructures. Risk assessments require robust records of such highly hazardous events, which is challenging as most of the products lie buried under the sea. Here we report the discovery by IODP Expedition 398 of a giant rhyolitic pumice deposit emplaced 520 ± 10 ky ago at water depths of 200 to 1000 m during a high-intensity, shallow submarine eruption of ancestral Santorini Volcano. Pyroclastic currents discharged into the sea transformed into turbidity currents and slurries, forming a >89 ± 8 km3volcaniclastic megaturbidite up to 150 m thick in the surrounding marine basins, while breaching of the sea surface by the eruption column laid down veneers of ignimbrite on three islands. The eruption is one of the largest recorded on the South Aegean Volcanic Arc, and highlights the hazards from submarine explosive eruptions.
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DOI:
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