Cesium and rubidium in submarine hydrothermal fluids; evidence for recycling of alkali elements

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doi: 10.1016/0012-821X(89)90163-5
Authors:Palmer, M. R.; Edmond, J. M.
Author Affiliations:Primary:
Mass. Inst. Technol., Dep. Earth, Atmos. and Planet. Sci., Cambridge, MA, United States
Volume Title:Earth and Planetary Science Letters
Source:Earth and Planetary Science Letters, 95(1-2), p.8-14. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X
Publication Date:1989
Note:In English. 25 refs.; illus. incl. 1 table
Summary:Cs, Rb and K concentrations were measured in hydrothermal fluids from the East Pacific Rise (EPR), southern Juan de Fuca Ridge, and Mid-Atlantic Ridge (MAR). The results of a time series from 21 degrees N (EPR) show a fall in the Cs/Rb ratios from 1979 to 1985. Together with the results from other areas, the data are consistent with a cracking front moving from weathered oceanic crust into fresh basalt within the magma chamber that supplies the heat for hydrothermal convection. Interaction of hydrothermal fluids from basalts that have undergone low-T weathering results in recycling of the alkalis (and other elements) between oceanic crust and sea-water. These data demonstrate that the concentrations of alkali elements in hydrothermal fluids do not represent a rigid constraint on the global magnitude of the circulation of sea-water through axial high-T hydrothermal systems. [Authors' abstract] [P.Br.]
Subjects:Alkali metals; Basalts; Cesium; Crust; Fluid phase; Geochemical cycle; Geochemistry; Halmyrolysis; Hydrothermal conditions; Igneous rocks; Lava; Metals; Mid-ocean ridges; Mobility; Oceanic crust; Rubidium; Sea water; Sea-floor spreading; Volcanic rocks; Atlantic Ocean; East Pacific; East Pacific Rise; Juan de Fuca Ridge; Mid-Atlantic Ridge; North Pacific; Northeast Pacific; Pacific Ocean
Abstract Numbers:90M/1884
Record ID:1990003676
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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