Fifteen Years of Structural Seismology in Iceland
What we know ...
And what we still need to learn ...
Presented to the Nordic Volcanological Institute, Reykjavik, Iceland
by William Menke, February 2001

Slides:

• Fig Cover Page (PS File).
• Fig Topics (PS File).

  Topic 1: Nature of the Lower Crust

  • Bjarnason et al. (1993) SIST paper provided clear evidence of seismic Moho
    • Fig Record Section (PS File).
    • Fig Ray Paths (PS File).
      • And showed that neovolcanic were not pervasively molten
    • Fig Western Volcanic Zone Tomography (PS File).
    • Fig Fairly normal "oceanic" compressional velocity profile (PS File).
  • Subsequentially we examined three general lines of evidence to corroborate these ideas Fig compressional:shear velocity ratios, seismic attenuation, maximum depth of earthquakes.
  • Fig Vp/Vs from SIST data (PS File).
  • Fig Vp/Vs from SIL data (PS File).
  • Fig Vp/Vs from B96 data (PS File).
  • Fig Typical transverse-component record section (PS File).
  • Fig Qp and Qs vs. depth (PS File).
  • Fig Qp and Qs vs. depth (PS File).
  • Fig Richard Allen (2001) uses long-period SH wave to measure Vs (PS File).
  • Fig Resulting profile pretty normal (PS File).
  • Other Refraction coverage in Iceland maps out crustal thickness
  • Fig Map of refraction coverage PS File
  • Fig PmP along FIRE Line PS File
  • Fig Big Moho Excursions PS File
  • Fig Map of Moho PS File
  • Fig Allen (2001) refines Moho map PS File
  • Fig Isostacy PS File
  • Fig Menke's fit PS File
  • Fig Allen's fit PS File
  • Fig Mantle Density Calculation PS File
  • Fig Possible Explanations PS File

  Topic 2: Structure of Central Volcanoes

  • Fig Katla Map PS File
  • Fig Katla Record Section PS File
  • Fig Katla Traveltime Anomaly PS File
  • Fig Katla Cross Section PS File
  • Fig Krafla Cross Section PS File
  • Fig Krafla Schematic PS File
  • Fig How are magma chambers fed ? PS File
  • Fig Elevation Data PS File
  • Fig Allen's (2001) model PS File

  Topic 3: The Lithosphere/Astenosphere Boundary

  • Fig Allen's (2001) model PS File
  • My Sensitivity Experiment
    • Fig Velocity Structures PS File
    • Fig SH Seismograms PS File
    • Fig Differential Seismograms PS File
    • Fig Lowpass Differential Seismograms PS File
    • Fig Spectral Ratios PS File
  • Fig Wolfe et al. (1997) model PS File
  • Fig Allen's (2001) model PS File
  • Fig Two issues: PS File
    • Fig Wide Plume Head Issue PS File
    • Fig Should you see cooling? PS File
    • Fig Do you see cooling? PS File
    • Fig Fast Upper Mantle Issue PS File
    • Fig Allen's (2001) Sn data PS File
    • Fig Pn in Iceland PS File

  Fig Summary PS File