Sediment subduction: a probable key for seismicity and tectonics at active plate boundaries
Por:
Kostoglodov V.
Publicada:
1 ene 1988
Resumen:
A model involving extensive occurrence of sediment subduction and viscous interaction of lithospheric plates at convergent zones is applied to derive simple relations between extremal values of seismic and global tectonic parameters. A test of these relations with the data set on great thrust earthquakes supports this model, and reveals the main contrasting modes of subduction stress regimes (continental-island arc-types, and Chilean-Mariana-types). An analysis of asperity categories in the framework of this model leads to the conclusion that the asperity type, and probably the fault area of great earthquakes, depends on the strength of coupling, which in its turn is governed by global tectonics and the amount of subducted sediments. The approach also yields a physically reasonable dependence of the seismic slip on the plate parameters, which is in agreement with the data now available. -from Author
Filiaciones:
Kostoglodov V.:
Inst of Phys of the Earth, USSR Acad of Sci, B Gruzinskaya 10, Moscow D-242, USSR