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High-resolution shallow reflection seismic image and surface evidence of the upper Tiber basin active faults (northern Apennines, Italy). (Articolo in rivista)
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- High-resolution shallow reflection seismic image and surface evidence of the upper Tiber basin active faults (northern Apennines, Italy). (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
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DELLE DONNE D. (*); PICCARDI L. (**); ODUM J.K. (***);
STEPHENSON W.J. (***); WILLIAMS R.A. (***) (2007)
High-resolution shallow reflection seismic image and surface evidence of the upper Tiber basin active faults (northern Apennines, Italy).
in Bollettino della Società Geologica Italiana (Testo stamp.); Società Geologica Italiana, Roma (Italia)
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- DELLE DONNE D. (*); PICCARDI L. (**); ODUM J.K. (***);
STEPHENSON W.J. (***); WILLIAMS R.A. (***) (literal)
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- (*) Dipartimento Scienze della Terra, Università St. Firenze, via
G. La Pira, 4 - 50121 Firenze.
(**) CNR Institute of Geosciences and Georesources, Florence,
Italy.
(***) U.S. Geological Survey, Denver, CO, USA. (literal)
- Titolo
- High-resolution shallow reflection seismic image and surface evidence of the upper Tiber basin active faults (northern Apennines, Italy). (literal)
- Abstract
- Shallow seismic reflection prospecting has been carried out in order to investigate the faults that bound to the southwest and northeast the Quaternary Upper Tiber Basin (Northern Apennines, Italy). On the northeastern margin of the basin a similar to 1 kin long reflection seismic profile images a fault segment and the associated up to 100 meters thick sediment wedge. Across the southwestern margin a 0.5 km-long seismic profile images a 50-55 degrees-dipping extensional fault, that projects to the scarp at the base of the range-front, and against which a 100 in thick syn-tectonic sediment wedge has formed.
The integration of surface and sub-surface data allows to estimate at least 190 meters of vertical displacement along the fault and a slip rate around 0.25 m/kyr.
Southwestern fault might also be interpreted as the main splay structure of regional Alto Tiberina extensional fault. At last, the 1917 Monterchi earthquake (Imax=X, Boschi et alii, 2000) is correlable with an activation of the southwestern fault, and thus suggesting the seismogenic character of this latter. (literal)
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