Generation of hydrothermal megaplumes by cooling of pillow basalts at mid-ocean ridges

M. R. Palmer () and G. G. J. Ernst
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M. R. Palmer: University of Bristol
G. G. J. Ernst: University of Bristol

Nature, 1998, vol. 393, issue 6686, 643-647

Abstract: Abstract Hydrothermal megaplumes are huge volumes of anomalously warm water that are located up to 1,000 metres above the sea floor and appear to be generated at mid-ocean ridges. Since their discovery in 1986, there has been considerable debate concerning their origin. A theoretical model is used to argue that the cooling of pillow basalts, which are erupted at ∼1,200 °C into sea water and are the most common form of submarine volcanic activity, is responsible for the megaplume formation.

Date: 1998
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DOI: 10.1038/31397

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