研究人员通过地震波分析发现，地球历史上规模最大的火山事件不仅在海底形成了巨大高原，还从根本上改变了其下方的洋壳构造。[1]由冈山科学大学、东京科学研究所和广岛大学组成的研究团队利用地震波数据，揭示了约1.1亿至1.2亿年前Ontong Java Plateau火山事件对洋壳内部结构的深远影响。[1]
研究表明，这次大规模火山活动在洋壳中形成了复杂的水平层状结构与垂直岩浆通道网络。[1]地震波在这些区域的传播速度异常缓慢，表明火山岩浆经历了化学改造过程，改变了周围岩石的成分。[1]这项研究成果已发表在《地球物理研究快报》2025年第52卷第19期上。[1]
Researchers have discovered that the largest volcanic event in Earth's history not only created an enormous underwater plateau but also dramatically restructured the oceanic crust beneath it. Using seismic wave analysis, scientists from Okayama Science University, Tokyo Institute of Science, and Hiroshima University found that the Ontong Java Plateau volcanic event, which occurred approximately 110–120 million years ago, generated a complex internal architecture within the oceanic crust consisting of horizontal layered structures and vertical magma channels, or dike swarms. [1]
The research, published in Geophysical Research Letters in 2025, Volume 52, Issue 19, reveals that unusually slow seismic wave velocities indicate the magma underwent chemical transformation processes that altered the composition of surrounding rocks. [1] The findings, led by researchers including Azusa Shito, Akira Ishikawa, and Masako Yoshikawa, provide new insights into how the largest known volcanic episode in planetary history fundamentally reshaped the geological substrate of an entire oceanic plate in the western Pacific region. [1]