当前位置: X-MOL 学术Nat. Geosci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Hazardous explosive eruptions of a recharging multi-cyclic island arc caldera
Nature Geoscience ( IF 15.7 ) Pub Date : 2024-03-25 , DOI: 10.1038/s41561-024-01392-7
Jonas Preine , Jens Karstens , Christian Hübscher , Tim Druitt , Steffen Kutterolf , Paraskevi Nomikou , Michael Manga , Ralf Gertisser , Katharina Pank , Sarah Beethe , Carole Berthod , Gareth Crutchley , Iona McIntosh , Thomas Ronge , Masako Tominaga , Acacia Clark , Susan DeBari , Raymond Johnston , Zenon Mateo , Ally Peccia , Christopher Jones , Günther Kletetschka , Abigail Metcalfe , Alexis Bernard , Hehe Chen , Shun Chiyonobu , Tatiana Fernandez-Perez , Kumar Batuk Joshi , Olga Koukousioura , Molly McCanta , Antony Morris , Paraskevi Polymenakou , Adam Woodhouse , Yuzuru Yamamoto , Kuo-Lung Wang , Hao-Yang Lee , Xiaohui Li , Dimitrios Papanikolaou

Caldera-forming eruptions of silicic volcanic systems are among the most devastating events on Earth. By contrast, post-collapse volcanic activity initiating new caldera cycles is generally considered less hazardous. Formed after Santorini’s latest caldera-forming eruption of ~1600 bce, the Kameni Volcano in the southern Aegean Sea enables the eruptive evolution of a recharging multi-cyclic caldera to be reconstructed. Kameni’s eruptive record has been documented by onshore products and historical descriptions of mainly effusive eruptions dating back to 197 bce. Here we combine high-resolution seismic reflection data with cored lithologies from International Ocean Discovery Program Expedition 398 at four sites to determine the submarine architecture and volcanic history of intra-caldera deposits from Kameni. Our shore-crossing analysis reveals the deposits of a submarine explosive eruption that produced up to 3.1 km3 of pumice and ash, which we relate to a historical eruption in 726 ce. The estimated volcanic explosivity index of magnitude 5 exceeds previously considered worst-case eruptive scenarios for Santorini. Our finding that the Santorini caldera is capable of producing large explosive eruptions at an early stage in the caldera cycle implies an elevated hazard potential for the eastern Mediterranean region, and potentially for other recharging silicic calderas.



中文翻译:

多循环岛弧火山口再充电的危险爆炸性喷发

形成火山口的硅质火山系统喷发是地球上最具破坏性的事件之一。相比之下,崩塌后的火山活动引发新的火山口循环通常被认为危险性较小。爱琴海南部的卡梅尼火山是在圣托里尼岛最近一次火山喷发(公元前约 1600 年 )之后形成的,它使得能够重建重新充电的多循环火山口的喷发演化。卡梅尼火山的喷发记录已被陆上产品和可追溯到公元前 197的主要喷发的历史描述所记录 。在这里,我们将高分辨率地震反射数据与国际海洋发现计划第 398 次探险在四个地点的岩心岩性相结合,以确定卡梅尼火山口内沉积物的海底结构和火山历史。我们的跨岸分析揭示了海底爆炸性喷发的沉积物,产生了高达 3.1 km 3的浮石和火山灰,我们将其与公元726 年的历史喷发联系起来 。估计的火山爆炸指数为 5 级,超过了之前认为的圣托里尼岛最坏的喷发情景。我们的发现是,圣托里尼火山口能够在火山口周期的早期阶段产生大规模的爆炸性喷发,这意味着东地中海地区的危险潜力较高,其他硅质火山口的潜在危险也可能增加。

更新日期:2024-03-26
down
wechat
bug