Physics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29r..29c&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 18, pp. 29-1, CiteID 1882, DOI 10.1029/2001GL014084
Physics
5
Seismology: Seismicity And Seismotectonics, Tectonophysics: Rheology-General, Tectonophysics: Stresses-Crust And Lithosphere, Physical Properties Of Rocks: Fracture And Flow
Scientific paper
Different rheological behavior of continental vs oceanic lithosphere can account for the shallower and lower subcrustal seismicity below the northern Apennines with respect to the deeper and more intense seismicity below the Calabrian arc in the south along the same subduction zone. We show that, for equal temperature distribution, oceanic slabs are predicted to display brittle behavior down to depths higher than those predicted for a continental slab. This opposite rheology is likely amplified by the higher strain rates and cooler slab temperatures in the south due to the faster subduction rollback and the oceanic composition of the downgoing lithosphere. Therefore the paucity of seismicity in the central-northern Apennines might not be related to the absence of the slab, but rather to its continental nature and to lower strain rates.
Carminati Eugenio
Doglioni Carlo
Giardina Francesca
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