Comparing two sections through the Apennine subduction zone (Italy), the slab is far deeper (>500 km) beneath the Calabrian arc than beneath the northern-central Apennines (<300 km). In contrast, topographic relief and cross-sectional area of the belt are larger in the northern-central Apennines. This paradox can be explained considering the depth of the basal decollement, which is deeper in the northern section (on average 10 kin) than in the southern (on average 3 km). The two sections occur respectively along subduction Of continental lithosphere in the north (Adriatic sea) and oceanic lithosphere in the south (Ionian sea). It is Concluded that, in the Apennines, the effects of sediment thickness on elevation and width of the belt can overcome those of subduction depth.
Basal Décollement and Subduction Depth vs. Topography in the Apennines - Calabrian arc
Scrocca D
2004
Abstract
Comparing two sections through the Apennine subduction zone (Italy), the slab is far deeper (>500 km) beneath the Calabrian arc than beneath the northern-central Apennines (<300 km). In contrast, topographic relief and cross-sectional area of the belt are larger in the northern-central Apennines. This paradox can be explained considering the depth of the basal decollement, which is deeper in the northern section (on average 10 kin) than in the southern (on average 3 km). The two sections occur respectively along subduction Of continental lithosphere in the north (Adriatic sea) and oceanic lithosphere in the south (Ionian sea). It is Concluded that, in the Apennines, the effects of sediment thickness on elevation and width of the belt can overcome those of subduction depth.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
