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Bulletin Volcanologique

, Volume 33, Issue 1, pp 101–117 | Cite as

Heat flow in the eastern pacific and sea floor spreading

  • D. P. McKenzie
  • J. G. Sclater
Article

Abstract

A simple model based on the hypothesis of sea floor spreading can account for the main features of two major high heat flow anomalies in the eastern Pacific; the broad band of high values along the crest of the East Pacific Rise and the large concentration of high values centered on the Galapagos Rift Zone. Using the same model to interpret both the surface shape of the midocean ridges and the heat loss of the entire ridge system, the calculated elevation is found to be comparable, though smaller than, that observed for the ridges and the heat dissipated by crustal production along the axis of the entire ridge system is shown to be approximately 15% of the total heat loss through the oceans.

Keywords

Heat Flow Lithosphere Rayleigh Number Magnetic Anomaly Midocean Ridge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Acharya, H. K., 1965,Seismicity of the Galapagos and vicinity. Bull. Seism. Soc. Am.,55, p. 609–617.Google Scholar
  2. Carslaw, H. S. andJ. C. Jaeger, 1959,Conduction of Heat in Solids. Clarendon Press, Oxford, pp. 93–99.Google Scholar
  3. Chase, I. C. andH. W. Menard,Bureau of Commercial Fisheries, topographic charts, Nos. 1–23, 1965, Bureau of Commercial Fisheries, Department of Interior, Washington, D. C.Google Scholar
  4. Gutenberg, B. andC. F. Richter, 1951,Seismicity of the Earth, 2nd ed., 310 pp., Princeton University Press, New Jersey.Google Scholar
  5. Herron, E. M. andJ. R. Heirtzler, 1967,Sea floor spreading near the Galapagos. Science,158, p. 775–780.CrossRefGoogle Scholar
  6. Langseth, M. G., X. Le Pichon, andM. Ewing, 1966,Crustal structure of the midocean ridges, 5. Heat flow through the Atlantic Ocean floor and convection currents. J. Geophys. Res.,71, p. 5321–5355.Google Scholar
  7. Lee, W. H. K., andS. Uyeda, 1965,Review of heat flow data. A. G. U. Monography No. 8, Terrestrial Heat Flow.Google Scholar
  8. Le Pichon, X. andM. G. Langseth, 1967,Midocean ridges: Comparison between heat flow, topographic slope and spreading rate inferred from magnetic data. Paper presented at Symposium on World Rift Systems, I.U.G.G., Zürich.Google Scholar
  9. McKenzie, D. P., 1968,The geophysical importance of high temperature creep. In Proceedings of the NASA Conference on the History of the Earth’s Crust, Princeton University Press (in press).Google Scholar
  10. —————, 1967,Some remarks on heat flow and gravity anomalies. J. Geophys. Res., 72, p. 6261–6271.CrossRefGoogle Scholar
  11. Raff, A. D., 1968,Sea floor spreading: Another rift. J. Geophys. Res. 73, p. 3699–3705.Google Scholar
  12. Sykes, L. R., 1967,Mechanism of earthquakes and nature of faulting on the midoceanic ridges. J. Geophys. Res.,72, p. 2131–2153.Google Scholar
  13. Talwani, M., X. Le Piciion, andM. Ewing, 1965,Crustal structure of the midocean ridges, 2. Computed model from gravity and seismic refraction data. J. Geophys. Res., 70, p. 341–352.Google Scholar
  14. Vacquier, V., J. G. Sclater, andC. E. Corry, 1967,Heat flow, eastern Pacific. Bull. Earthq. Res. Inst.,45, p. 375–393.Google Scholar
  15. Vine, F. J., 1966,Spreading on the ocean floor: New evidence. Science,154, p. 1405–1415.CrossRefGoogle Scholar

Copyright information

© Stabilimento Tipografico Francesco Giannini & Figli 1969

Authors and Affiliations

  • D. P. McKenzie
    • 1
    • 2
  • J. G. Sclater
    • 1
    • 3
  1. 1.University of CaliforniaSan Diego
  2. 2.Institute of Geophysics and Planetary PhysicsLa Jolla
  3. 3.Marine Physical Laboratory of the Scripps Institution of OceanographyLa Jolla

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