追踪海底岩流动的冲动性海底事件的源机制
Peifeng Wang1, Yen Joe Tan1, DelWayne R Bohnenstiehl2
1Department of Earth and Environmental Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.
Science advances
|August 22, 2025
概括
海底岩流会产生冲动性的海底事件. 这些事件主要是由热岩蒸发的海水造成的,
科学领域:
- 地质学
- 火山学
- 海洋学
背景情况:
- 海底火山喷发在很大程度上是没有被观察到的,因为海洋的深度.
- 冲动性地震和声波事件与海底岩流有关, 但它们的起源尚不清楚.
研究的目的:
- 调查2015年轴性海山喷发期间冲动事件的源机制.
- 确定这些事件是否可以用于监测海底火山活动.
主要方法:
- 分析了2015年爆发的2万多个冲动性地震声学事件.
- 时间空间演变,热传输估计和地质数据的整合.
- 与其他中海山脊和海底山脉的事件进行比较.
主要成果:
- 大多数事件的地震声波形式都显示出爆炸源机制.
- 最大的事件可能涉及岩挥发物的脱气.
- 大多数事件归因于热蒸发的海水形成的气泡.
- 由于蒸发受阻,在3000米以上的深度发生的事件较少.
结论:
- 海底冲动事件主要是由海水在海底岩流中蒸发而产生的.
- 这些事件为远程描述各种海底环境中的火山爆发动态提供了宝贵的工具.
- 这些事件的频率取决于深度,较浅的喷发产生更多.
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