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

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doi: 10.1038/31397
Authors:Palmer, M. R.; Ernst, G. G. J.
Author Affiliations:Primary:
University of Bristol, Department of Earth Sciences, Bristol, United Kingdom
Volume Title:Nature (London)
Source:Nature (London), 393(6686), p.643-647. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1998
Note:In English. 44 refs.; illus., incl. 1 table
Summary:Transient, detached hydrothermal plumes occurring up to 1000 m above the sea-floor have recently been discovered, and are termed 'megaplumes' since they are generated at mid-ocean ridges over periods of days, by a heat flux several orders of magnitude greater than that which generates chronic plumes. The physical and chemical features that might result from the cooling of pillow basalts in the deep oceans, are examined. A theoretical model is then presented that indicates that such cooling is a viable mechanism for the formation of hydrothermal megaplumes. [R.K.H.]
Sections:Petrology
Subsections:Oceanic petrology
Subjects:Basalts; Convection; Eruptions; Genesis; Geochemistry; Heat flow; Hydrothermal conditions; Hydrothermal vents; Igneous rocks; Lava; Marine environment; Mathematical methods; Mid-ocean ridges; Models; Ocean circulation; Ocean floors; Pillow lava; Plumes; Sea-floor spreading; Spreading centers; Submarine volcanoes; Volcanic rocks; Volcanoes
Abstract Numbers:98M/4357
Record ID:1998047104
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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