Non-Double Couple Earthquake Mechanisms in Volcanic Environments

  • Geoffrey R. Robson
Part of the IAVCEI Proceedings in Volcanology book series (VOLCANOLOGY, volume 3)

Abstract

Earthquake mechanisms involving movement of pore fluids accompanying tensile and shear failure in volcanic environments are described. Three mechanisms: extension failure, extension-shear failure and shear failure are identified. The role of pore fluid pressure in determining the type of failure mechanism is described and the factors which determine the relative frequency of occurrence of the three types of failure are commented upon.

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References

  1. Euler R, Winkler HGF (1957) Über die Viscositäten von Gesteinsund Silicatschmelzen. Glastech Ber 30:325–332.Google Scholar
  2. Foulger GR (1988) Hengill Triple Junction SW Iceland II: anomalous earthquake focal mechanisms and implications for process within the geothermal reservoir and at accretionary plate boundaries. J Geophys Res 93:13507–13525.CrossRefGoogle Scholar
  3. Foulger GR, Long RE (1984) Anomalous focal mechanisms: tensile crack formation at an accreting plate boundary. Nature (Lond) 310:43–45.CrossRefGoogle Scholar
  4. Foulger GR, Long RE, Einarsson P, Bjornsson A (1989) Implosive earthquakes at the active accretionary plate boundary in northern Iceland. Nature (Lond) 337:640–642.CrossRefGoogle Scholar
  5. Ishimoto M (1932) Existence d’une source quadruple au foyer sismique d’apres l’etude de la distribution de mouvements initiaux des secouses sismiques. Earthquake Res Inst Bull 10:449–471.Google Scholar
  6. Julian BR, Sipkin SA (1985) Earthquake processes in the Long Valley caldera area. J Geophys Res 190:11155–11169.CrossRefGoogle Scholar
  7. Knopoff L, Randall MJ (1970) The compensated linear-vector dipole, a possible mechanism for deep earthquakes. J Geophys Res 75:4957–4963.CrossRefGoogle Scholar
  8. Kushiro I, Yoder HS, Mysen BO (1976) Viscosity of basaltic and andesitic liquids at high pressures. Carnegie Inst Wash Year Book 75:615–618.Google Scholar
  9. Meyer E (1963) High-intensity sound in liquids. In: Albers VM (ed) Underwater acoustics. Plenum, New York.Google Scholar
  10. Murase T, McBirney AR (1973) Properties of some common igneous rocks and their melts at high temperatures. Geol Soc Am Bull 84:3563–3592.CrossRefGoogle Scholar
  11. Navon O, Hutcheon ID, Rossman GR, Wasserburg GJ (1988) Mantle-derived fluids in diamond micro-inclusions. Nature (Lond) 335:384–389.CrossRefGoogle Scholar
  12. Orowan E (1967) Mechanical properties of crust and mantle. In: Runcorn K (ed) International Dictionary of Geophysics. Pergamon, Oxford.Google Scholar
  13. Robson GR, Barr KG, Canales Luna L (1968) Extension failure, an earthquake mechanism. Nature (Lond) 218:28–32.CrossRefGoogle Scholar
  14. Rosenqvist T (1974) Principles of extractive metallurgy. McGraw-Hill, New York.Google Scholar
  15. Ryan MP, Blevins JYK (1987) The viscosity of synthetic and natural melts and glasses at high temperatures and 1 bar (10 pascals) pressure and higher pressures. US Geol Surv Bull 1764.Google Scholar
  16. Scarfe MC, Mysen BO, Virgo D (1987) Pressure dependence of the viscosity of silicate melts. Geochem Soc Spec Publ 1:59–67.Google Scholar
  17. Shaw HR (1980) The fracture mechanisms of magma transport from the mantle to the surface. In: Hargraves RB (ed) Physics of magmatic processes. Princeton, Princeton, New Jersey.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • Geoffrey R. Robson

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