Contents

• Contents
• List of Figures
• List of Tables
• Introduction
• Earth's upper mantle
  • Upper mantle discontinuities
    • Hales discontinuity
    • Gutenberg discontinuity
    • Lehmann discontinuity
  • Transition zone discontinuities
    • 410-km discontinuity
    • 520-km discontinuity
    • 660-km discontinuity
• Seismic investigation of upper mantle structure
  • P-wave travel times and wide angle reflections
  • ScS reverberation studies
  • Converted phases and receiver functions
  • PKPPKP
  • PP and SS precursors
• Data
  • Yellowknife Array
  • Tw~st Array
  • Data selection
    • YKA dataset
    • Tw~st dataset
• Processing
  • Filtering
  • Frequency-wavenumber-analysis
    • Characterization of PP phases
  • Sliding window fk-analysis - 'fk-movies'
    • Method and Display
    • Resolution and Application
  • Vespagrams
  • Discussion of Errors
  • Anisotropy
• Results
  • P-waves
    • Shallow discontinuities
    • Lehmann discontinuity
    • 410-km discontinuity
  • S-waves
    • SS reflections and upper mantle anisotropy
• Discussion
  • Detected discontinuities
  • Non-detected discontinuities
  • Anisotropy structure
• Conclusions
• Tables
• References
• Danksagung