Theory applied to the Mid-Atlantic Ridge hydrothermal plumes; the finite-difference approach

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doi: 10.1016/0377-0273(92)90043-D
Authors:Rudnicki, M. D.; Elderfield, H.
Author Affiliations:Primary:
Cambridge University, Department of Earth Sciences, Cambridge, United Kingdom
Other:
University of Leeds, United Kingdom
Volume Title:Essays on magmas and other earth fluids; a volume in appreciation of Prof. Peter G. Harris
Volume Authors:Cox, K. G., editor; Baker, P. E.
Source:Essays on magmas and other earth fluids; a volume in appreciation of Prof. Peter G. Harris, edited by K. G. Cox and P. E. Baker. Journal of Volcanology and Geothermal Research, 50(1-2), p.161-172. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-0273
Publication Date:1992
Note:In English. 31 refs.; illus., incl. 5 tables
Summary:A system of differential equations describing the entrainment of ambient sea-water during the rise of a buoyant hydrothermal plume has been solved by an explicit finite-difference method. An equation for tracer concentration has been added so that concentrations in the neutrally buoyant plume can be calculated for those elements whose background profiles vary over the depth range of the buoyant plume. The height of plume rise can be related directly to the thermal and hydrothermal vent flux. For the TAG vent field, 26 degrees N MAR, five plume layers have been identified. The calculated heat flux is 500-940 MW, and the fluid flux is 0.210-0.392 m3/s. The fluid flux to the neutrally buoyant plume is 1460-2740 m3/s. Calculated plume concentrations of Mn compared with measurements made at TAG in 1988 indicate that there is either 50% removal of Mn in the buoyant plume, or that low T vent fluids contribute approx 50% of the total thermal output of the field. [R.E.S.]
Subjects:Finite difference analysis; Hydrothermal vents; Mid-ocean ridges; Ocean floors; Plumes; Sea water; Statistical analysis; Atlantic Ocean; Mid-Atlantic Ridge
Abstract Numbers:93M/1209
Record ID:1996025119
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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