scholarly journals Slab bending, syn-subduction normal faulting, and out-of-sequence thrusting in the Central Apennines

Tectonics ◽  
2014 ◽  
Vol 33 (4) ◽  
pp. 530-551 ◽  
Author(s):  
Eugenio Carminati ◽  
Simone Fabbi ◽  
Massimo Santantonio
Keyword(s):  
Normal Faulting ◽  
Central Apennines ◽  
Slab Bending

The Luco dei Marsi deep-seated gravitational deformation: first evidence of a basal shear zone in the central Apennine mountain belt (Italy) 

2021 ◽  
Author(s):  
Emiliano Di Luzio ◽  
Marco Emanuele Discenza ◽  
Maria Luisa Putignano ◽  
Mariacarmela Minnillo ◽  
Diego Di Martire ◽  
...  
Keyword(s):  
Rock Mass ◽  
Shear Zone ◽  
Engineering Geology ◽  
Slope Deformation ◽  
European Alps ◽  
Structural Constraints ◽  
Normal Faulting ◽  
Central Apennines ◽  
Gravity Driven ◽  
Basal Shear

<p>The nature of the boundary between deforming rock masses and stable bedrock is a significant issue in the scientific debate on Deep-Seated Gravitational Slope Deformations (DSGSDs). In many DSGSDs the deforming masses move on a continuous sliding surface or thick basal shear zone (BSZ) [1-3]. This last feature is due to viscous and plastic deformations and was observed (or inferred) in many worldwide sites [4]. However, no clear evidence has been documented in the geological context of the Apennine belt, despite the several cases of DSGSDs documented in this region [5-6].</p><p>This work describes a peculiar case of a BSZ found in the central part of the Apennine belt and observed at the bottom of a DSGSD which affects the Meso-Cenozoic carbonate ridge overhanging the Luco dei Marsi village (Abruzzi region). The NNW-SSE oriented mountain range is a thrust-related Miocene anticline, edged on the east by an intramountain tectonic depression originated by Plio-Quaternary normal faulting. The BSZ appears on the field as a several meters-thick cataclastic breccia with fine matrix developed into Upper Cretaceous, biodetritic limestone and featuring diffuse rock damage.</p><p>The gravity-driven process was investigated through field survey, aerial photo interpretation and remote sensing (SAR interferometry) and framed into a geological model which was reconstructed also basing on geophysical evidence from the CROP 11 deep seismic profile. The effects on slope deformation determined by progressive displacements along normal faults and consequent unconfinement at the toe of the slope was analysed by a multiple-step numerical modelling constrained to physical and mechanical properties of rock mass.</p><p>The model results outline the tectonic control on DSGSD development at the anticline axial zone and confirm the gravitational origin of the rock mass damage within the BSZ. Gravity-driven deformations were coexistent with Quaternary tectonic processes and the westward (backward) migration of normal faulting from the basin margin to the inner zone of the deforming slope.</p><p><strong>References</strong></p><p>[1] Agliardi F., Crosta G.B., Zanchi A., (2001). Structural constraints on deep-seated slope deformation kinematics. Engineering Geology 59(1-2), 83-102. https://doi.org/10.1016/S0013-7952(00)00066-1.</p><p>[2] Madritsch H., Millen B.M.J., (2007). Hydrogeologic evidence for a continuous basal shear zone within a deep-seated gravitational slope deformation (Eastern Alps, Tyrol, Austria). Landslides 4(2), 149-162. https://doi.org/10.1007/s10346-006-0072-x.</p><p>[3] Zangerl C., Eberhardt E., Perzlmaier S., (2010). Kinematic behavior and velocity characteristics of a complex deep-seated crystalline rockslide system in relation to its interaction with a dam reservoir. Engineering Geology 112(1-4), 53-67. https://doi.org/10.1016/j.enggeo.2010.01.001.</p><p>[4] Crosta G.B., Frattini P., Agliardi F., (2013). Deep seated gravitational slope deformations in the European Alps. Tectonophysics 605, 13-33. https://doi.org/10.1016/j.tecto.2013.04.028.</p><p>[5] Discenza M.E., Esposito C., Martino S., Petitta M., Prestininzi A., Scarascia-Mugnozza G., (2011). The gravitational slope deformation of Mt. Rocchetta ridge (central Apennines, Italy): Geological-evolutionary model and numerical analysis. Bulletin of Engineering Geology and the Environment,70(4), 559-575. https://doi.org/10.1007/s10064-010-0342-7.</p><p>[6] Esposito C., Di Luzio E., Scarascia-Mugnozza G., Bianchi Fasani G., (2014). Mutual interactions between slope-scale gravitational processes and morpho-structural evolution of central Apennines (Italy): review of some selected case histories. Rendiconti Lincei. Scienze Fisiche e Naturali 25, 161-155. https://doi.org/10.1007/s12210-014-0348-3.</p>

Active normal faulting along the Mt. Morrone south-western slopes (central Apennines, Italy)

2009 ◽  
Vol 100 (1) ◽  
pp. 157-171 ◽  
Author(s):  
Stefano Gori ◽  
Biagio Giaccio ◽  
Fabrizio Galadini ◽  
Emanuela Falcucci ◽  
Paolo Messina ◽  
...  
Keyword(s):  
Normal Faulting ◽  
Central Apennines

Normal faulting along the western side of the Matese Mountains: Implications for active tectonics in the Central Apennines (Italy)

2016 ◽  
Vol 82 ◽  
pp. 16-36 ◽  
Author(s):  
Paolo Boncio ◽  
Anna Maria Dichiarante ◽  
Eugenio Auciello ◽  
Michele Saroli ◽  
Francesco Stoppa
Keyword(s):  
Active Tectonics ◽  
Normal Faulting ◽  
Central Apennines ◽  
Western Side

The role of post-orogenic normal faulting in hydrocarbon migration in fold-and-thrust belts: Insights from the central Apennines, Italy

2021 ◽  
pp. 105429
Author(s):  
Luca Smeraglia ◽  
Simone Fabbi ◽  
Roberta Maffucci ◽  
Luigi Albanesi ◽  
Eugenio Carminati ◽  
...  
Keyword(s):  
Normal Faulting ◽  
Hydrocarbon Migration ◽  
Central Apennines ◽  
Thrust Belts ◽  
Fold And Thrust Belts

A time dependent model of elastic stress in the Central Apennines

2021 ◽  
Author(s):  
Alessandro Caporali ◽  
Joaquin Zurutuza ◽  
Mauro Bertocco
Keyword(s):  
Principal Stress ◽  
Moment Tensor ◽  
Stress Transfer ◽  
Stress Rate ◽  
Coulomb Stress ◽  
Additional Contribution ◽  
Normal Faulting ◽  
Central Apennines ◽  
Regional Stress ◽  
Gnss Network

<p>Seismicity in the Central Apennines is characterized by normal faulting with dip NE-SW near 45°. We show that if the stress at the hypocenter of the 2016 Norcia (Mw=6.5) and 2009 L’Aquila (Mw=6.3 on the Paganica fault) earthquakes originated only from stress transfer from previous historical events occurred in 1315 and 1461 (L’Aquila), 1703 (Montereale plain) and 1703 (Norcia/Valnerina), then the orientation of the principal stress axes would be inconsistent with the observed tensional regime. The additional contribution of a regional stress is thus required to properly align the principal stress axes to those of the moment tensor, but GNSS geodesy provides only stress rates. We empirically estimate a time multiplier for the regional stress rate, computed with a dense GNSS network, such that the principal stress axes resulting from the sum of the stress transferred by previous events and the regional stress rate multiplied by the empirical temporal scale are consistent with normal faulting, both at the L’Aquila and Norcia hypocenters. Based on a Catalogue of 36 events of magnitude larger than 5.6 we estimate the total Coulomb stress at depths and along planes parallel to those of L’Aquila and Norcia. We provide evidence of an asymmetry of the Coulomb stress leading to a stress concentration near the hypocenter of the two events just prior of the 2009 and 2016  earthquakes. This stress anomaly disappeared after the two events. Similar stress patterns are observed for earlier events which took place in 1461 at L’Aquila, 1703 on the Montereale plain and in 1703 at Norcia/Valnerina. The 1997 sequence of Colfiorito exhibits a similar, anisotropic Coulomb stress pattern. Based on the Database of Individual Seismogenic Sources DISS 3.2.1 of INGV we identify as areas of maximum Coulomb stress at present (>2016) the Gran Sasso , the Camerino and Sarnano areas and the area between the San Pio delle Camere, Tocco da Casauria and Sulmona faults.</p>

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