Hydrothermal circulation through mid-ocean ridge flanks; fluxes of heat and magnesium

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doi: 10.1016/0016-7037(94)90007-8
Author(s): Mottl, M. J.; Wheat, C. G.
Author Affiliation(s): Primary:
University of Hawaii, Department of Oceanography, Honolulu, HI, United States
Volume Title: Heinrich D. Holland special issue
Volume Author(s): Ohmoto, Hiroshi, editor; Logsdon, Mark J.
Source: Geochimica et Cosmochimica Acta, 58(10), p.2225-2237; Symposium in honor of Heinrich D. Holland, Reston, VA, May 8-9, 1992, edited by Hiroshi Ohmoto and Mark J. Logsdon. Publisher: Pergamon, Oxford, International. ISSN: 0016-7037 CODEN: GCACAK
Note: In English; illus., incl. 1 table
Summary: The magnitude of the sea-water flux through a ridge axis and flanks is estimated using the heat budget as a major constraint, and the evidence for the size and nature of chemical fluxes through the flanks, using Mg as an example, is summarized. Between 10 and 40% of the river flux of Mg can be taken up during high-T alteration of the basaltic crust along the ridge axis, most of the rest may be taken up by alteration on the ridge flanks. The advective heat loss on the flanks is so large that relatively warm T and/or high upflow velocities are required over much sea-floor to remove this heat. The sea-water flux is so large that only a small change in its composition would result in large chemical fluxes. The role of hydrothermal circulation through mid-ocean ridge flanks in global geochemical mass-balances is discussed.
Year of Publication: 1994
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; 18 Geophysics, Solid-Earth; Alkaline earth metals; Alteration; Atlantic Ocean; Basalts; Chemical composition; Chemical reactions; Circulation; Convection; Crust; DSDP Site 505; Deep Sea Drilling Project; East Pacific; East Pacific Rise; Equatorial Pacific; Galapagos Rift; Geochemistry; Heat flow; High temperature; Hydrochemistry; Hydrothermal conditions; IPOD; Igneous rocks; Juan de Fuca Ridge; Leg 11; Leg 69; Leg 92; Magnesium; Mariana Trough; Marine sediments; Metals; Mid-ocean ridges; North Atlantic; North Pacific; Northeast Pacific; Northwest Atlantic; Northwest Pacific; Ocean floors; Oceanic crust; Pacific Ocean; Plate tectonics; Sea water; Sea-floor spreading; Sediments; Spreading centers; Temperature; Thermal conductivity; Volcanic rocks; West Atlantic; West Pacific
Coordinates: N015458 N015458 W0834724 W0834724
N234000 N385000 W0690000 W0772000
Record ID: 2010018231
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom