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| Dziak, Rp; Smith, Dk; Bohnenstiehl, Dr; Fox, Cg; Desbruyeres, Daniel; Matsumoto, H; Tolstoy, M; Fornari, Dj. |
| [1] Mid-ocean ridge volcanic activity is the fundamental process for creation of ocean crust, yet the dynamics of magma emplacement along the slow spreading Mid-Atlantic Ridge ( MAR) are largely unknown. We present acoustical, seismological, and biological evidence of a magmatic dike intrusion at the Lucky Strike segment, the first detected from the deeper sections (> 1500 m) of the MAR. The dike caused the largest teleseismic earthquake swarm recorded at Lucky Strike in > 20 years of seismic monitoring, and one of the largest ever recorded on the northern MAR. Hydrophone records indicate that the rate of earthquake activity decays in a nontectonic manner and that the onset of the swarm was accompanied by 30 min of broadband (> 3 Hz) intrusion... |
| Tipo: Text |
Palavras-chave: Mid Atlantic Ridge; Earthquake; Hydroacoustic. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00000/10897/7768.pdf |
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