Sejsmiczna struktura litosfery i górnego płaszcza Ziemi kontynentów

• Autorzy: Grad, M.

Warianty tytułu

EN

Seismic structure of the lithosphere and upper mantle of continents

• Języki publikacji: PL

Abstrakty

EN

Seismic models of the continental lower lithosphere and upper mantle obtained from interpretation of body P waves are discussed. The models of the lower lithosphere differ in the character of veloc-ity distribution, the number of layers, and the presence of the lower-velocity layers. This is the con-sequence of inhomogeneity of the lower lithosphere, but also follows from the differing accuracy and quality of seismic data. The differences in models resulting from the use of seismological methods based on earthquake observations and experiments on long-range profiles are pointed out. In all continental mantle models, both the "410" km and "660" km discontinuities were clearly ob-served. The "520" km boundary is observed for some models (for some models only a gradient change is observed). So, the global existence of this boundary for P waves seems to be still contro-versial.

Słowa kluczowe

PL

struktura litosfery; model dolnej litosfery; prędkość fal sejsmicznych

• Czasopismo: Przegląd Geofizyczny
• Rocznik: 2000
• Tom: Z. 1
• Strony: 43-61
• Opis fizyczny: wykr., bibliogr. 74 poz.

Twórcy

autor

Grad, M.

• Instytut Geofizyki Uniwersytetu Warszawskiego