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Content archived on 2024-04-19

Geodynamic modelling of an active region of the Mediterranean: the Apennines


Definition of a geodynamic model of the Apennines - north of 40.5º and south of 43.5º,
from Miocene to the present. Collection of original data on crustal and upper mantle
structure and anisotropy, tectonic evolution in brittle and ductile environment, tectonic
rotations in Neogene units, present-day state of stress and deformation rates. Construction
of analogic and numerical models of the Tyrrhenian-Apennines system.

Collection and processing of new GPS data in the Southern and the Northern Apennines,
using existing vertices, and installing new ones to increase the coverage in the most
interesting areas. The use of different codes and the independent data processing by two
different groups will be applied to better constrain and control the results.

Compilation of a new catalogue of seismic moments of strong historical earthquakes (since
1400 AD), estimated from the distribution of felt intensities, to assess the amount of
coseismic deformation occurred in the past six centuries.

Definition of the lithosphere-asthenosphere structure beneath the Apennines by means of
seismic tomography applied to high quality digital data collected by the ING network since
1987. Deployment of two temporary seismological linear arrays across the Apennines, to
infer Moho depth and dip from teleseismic receiver functions, and to investigate anisotropic
structures in the upper mantle.

Compilation of a database containing present-day stress data, including borehole breakout
measurements in the deep wells of Tyrhhenian Latium and Tuscany and in the Apenninic
chain, foredeep, and foreland; fault plane solutions of earthquakes occurred in the Apennines
since 1988.

Palaeomagnetic analyses of Neogene units at the compressional front of the Apennines, in
some intra-mountain basins and in the Tyrrhenian extensional margin, to recognize tectonic
rotations. AMS (Anisotropy of Magnetic Susceptibility) analyses on the same units for the
definition of the strain pattern.

Field observations in both the brittle and the ductile deformation regimes of the Northern
Apennines, including analysis of oriented cores from deep geothermal wells. Construction
of a crustal profile to describe the tectonic evolution and investigate the relationship between
deep and surface deformation.

Two- and three-dimensional analogic models of the Apennines/Tyrrhenian system, with
properly scaled laboratory experiments and different rheologies, to model the
subduction/collision processes.
Two-and three-dimensional numerical modelling based both on commercial and academic
finite element codes, to determine the long wavelength features of the stress and strain field
in the Apennines, and the short wavelength features in the contact region between Apennines
and the Adriatic plate.

Call for proposal

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Istituto Nazionale di Geofisica
EU contribution
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Via Vigna Murata 605
00143 Roma

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Participants (6)