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- Q2188500 subject Q2945795.
- Q2188500 subject Q7215285.
- Q2188500 subject Q8727741.
- Q2188500 abstract "The low-velocity zone (LVZ) occurs close to the boundary between the lithosphere and the asthenosphere in the upper mantle. It is characterized by unusually low seismic shear wave velocity compared to the surrounding depth intervals. This range of depths also corresponds to anomalously high electrical conductivity.It is present between about 80 and 300 km depth. This appears to be universally present for S waves, but may be absent in certain regions for P waves. A second low-velocity zone (not generally referred to as the LVZ, but as ULVZ) has been detected in a thin ≈50 km layer at the core-mantle boundary. These LVZs may have important implications for plate tectonics and the origin of the Earth's crust.The LVZ has been interpreted to indicate the presence of a significant degree of partial melting, and alternatively as a natural consequence of a thermal boundary layer and the effects of pressure and temperature on the elastic wave velocity of mantle components in the solid state. In any event, a very limited amount of melt (about 1%) is needed to produce these effects. Water in this layer can lower the melting point, and may play an important part in its composition.".
- Q2188500 thumbnail Speeds_of_seismic_waves.PNG?width=300.
- Q2188500 wikiPageWikiLink Q101949.
- Q2188500 wikiPageWikiLink Q104698.
- Q2188500 wikiPageWikiLink Q108193.
- Q2188500 wikiPageWikiLink Q1208908.
- Q2188500 wikiPageWikiLink Q1330051.
- Q2188500 wikiPageWikiLink Q166257.
- Q2188500 wikiPageWikiLink Q17149167.
- Q2188500 wikiPageWikiLink Q2053186.
- Q2188500 wikiPageWikiLink Q2054924.
- Q2188500 wikiPageWikiLink Q2945795.
- Q2188500 wikiPageWikiLink Q656836.
- Q2188500 wikiPageWikiLink Q7215285.
- Q2188500 wikiPageWikiLink Q76770.
- Q2188500 wikiPageWikiLink Q7944.
- Q2188500 wikiPageWikiLink Q83296.
- Q2188500 wikiPageWikiLink Q8727741.
- Q2188500 wikiPageWikiLink Q878045.
- Q2188500 comment "The low-velocity zone (LVZ) occurs close to the boundary between the lithosphere and the asthenosphere in the upper mantle. It is characterized by unusually low seismic shear wave velocity compared to the surrounding depth intervals. This range of depths also corresponds to anomalously high electrical conductivity.It is present between about 80 and 300 km depth. This appears to be universally present for S waves, but may be absent in certain regions for P waves.".
- Q2188500 label "Low-velocity zone".
- Q2188500 depiction Speeds_of_seismic_waves.PNG.