The Umbria-Marche arcuate fold belt (Italy)

Lavecchia, Giusy; Minelli, Giorgio; Pialli, G.

doi:10.1016/0040-1951(88)90086-8

Cited by 54 publications

(24 citation statements)

References 10 publications

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“…To this task, we have elaborated two geological cross sections, about 20 km long, oriented orthogonal to the two fault segments modeled in this study (A‐A′ and B‐B′, respectively; Figure ). The sections were drawn by assuming a partial involvement of the Paleozoic basement units, as suggested by Lavecchia et al () and Calamita et al (). Dip domains and thickness of the outcropping formations were derived by compiling existing 1:10,000‐scale geological maps (Regione Umbria: http://geo.umbriaterritorio.it/umbriageo/atlante/; Regione Marche: http://www.ambiente.marche.it/Territorio/Cartografiaeinformazioniterritoriali; Centamore et al, ; Pierantoni et al, ), whereas we assigned to the lowermost units (Triassic to Early Jurassic formations, whose base does not crop out in the study area) a minimum 3 km total thickness, based on deep borehole data and regional correlations (see also: Bigi et al, ; Speranza & Minelli, ).…”

Section: Discussionmentioning

confidence: 99%

Complex Fault Geometry and Rupture Dynamics of the M_W 6.5, 30 October 2016, Central Italy Earthquake

et al. 2018

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We study the 30 October 2016 Norcia earthquake (MW 6.5) to retrieve the rupture history by jointly inverting seismograms and coseismic Global Positioning System displacements obtained by dense local networks. The adopted fault geometry consists of a main normal fault striking N155° and dipping 47° belonging to the Mt. Vettore‐Mt. Bove fault system (VBFS) and a secondary fault plane striking N210° and dipping 36° to the NW. The coseismic rupture initiated on the VBFS and propagated with similar rupture velocity on both fault planes. Updip from the nucleation point, two main slip patches have been imaged on these fault segments, both characterized by similar peak‐slip values (~3 m) and rupture times (~3 s). After the breakage of the two main slip patches, coseismic rupture further propagated southeastward along the VBFS, rupturing again the same fault portion that slipped during the 24 August earthquake. The retrieved coseismic slip distribution is consistent with the observed surface breakages and the deformation pattern inferred from interferometric synthetic aperture radar measurements. Our results show that three different fault systems were activated during the 30 October earthquake. The composite rupture model inferred in this study provides evidences that also a deep portion of the NNE trending section of the Olevano‐Antrodoco‐Sibillini thrust broke coseismically, implying the kinematic inversion of a thrust ramp. The obtained rupture history indicates that in this sector of the Apennines, compressional structures inherited from past tectonics can alternatively segment boundaries of NW trending active normal faults or break coseismically during moderate‐to‐large magnitude earthquakes.

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Section: Discussionmentioning

confidence: 99%

Complex Fault Geometry and Rupture Dynamics of the M_W 6.5, 30 October 2016, Central Italy Earthquake

et al. 2018

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“…The paleogeography of the northern Apennines differs from the paleogeography of the central and southern Apennines (Figure 12a) (see also discussion by Lucente and Speranza [2001]). In the Umbria‐Marche region of the northern Apennines, the sedimentary pile predominantly consists of Early Jurassic to Paleogene pelagic limestones deposited on top of Triassic evaporites [ Lavecchia et al , 1988, and references therein]. Furthermore, the crust and lithosphere beneath the Umbria‐Marche region is thinner in comparison with the central and southern Apennines [ Calcagnile and Panza , 1980; Geiss , 1987].…”

Section: Origin Of the Apenninesmentioning

confidence: 99%

Neogene and Quaternary rollback evolution of the Tyrrhenian Sea, the Apennines, and the Sicilian Maghrebides

Rosenbaum

Lister²

2004

Tectonics

344

267

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Reconstruction of the evolution of the Tyrrhenian Sea shows that the major stage of rifting associated with the opening of this basin began at ∼10 Ma. It involved two episodes of back arc extension, which were induced by the rollback of a west dipping subducting slab. The first period of extension (10–6 Ma) was prominent in the northern Tyrrhenian Sea and in the western part of the southern Tyrrhenian Sea. The second period of extension, mainly affected the southern Tyrrhenian Sea, began in the latest Messinian (6–5 Ma) and has been accompanied by subduction rollback at rates of 60–100 km Myr−1. Slab reconstruction, combined with paleomagnetic and paleogeographic constraints, indicates that in the central Apennines, the latest Messinian (6–5 Ma) arrival of a carbonate platform at the subduction zone impeded subduction and initiated a slab tear and major strike‐slip faults. These processes resulted in the formation of a narrow subducting slab beneath the Ionian Sea that has undergone faster subduction rollback and induced extreme rates of back arc extension.

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“…Such drifting may have initiated a strong anticlockwise rotation of Southern Apennines (Incoronato and Nardi, 1987) with respect to the Northern Apennines. Due to this differential rotation, the area near the Ancona-Anzio Line, at the boundary between Northern and Central Apennines, became a complex domain with different structural trends (from north-south to east-west, Castellarin et al, 1978;Calamita and Deiana, 1988); an increase in arc formation of the Northern Apennines (Lavecchia et al, 1988) may also have started. With this event, the two previously mentioned perityrrhenian arcuate features were eventually built up and will then follow different evolutions.…”

Section: Outline Of the Perityrrhenian Neogene Chains In Relation To mentioning

confidence: 99%

The Main Results of ODP Leg 107 in the Frame of Neogene to Recent Geology of Perityrrhenian Areas

Sartori¹

1990

Proceedings of the Ocean Drilling Program

104

115

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The Umbria-Marche arcuate fold belt (Italy)

Cited by 54 publications

References 10 publications

Complex Fault Geometry and Rupture Dynamics of the M_W 6.5, 30 October 2016, Central Italy Earthquake

Complex Fault Geometry and Rupture Dynamics of the M_W 6.5, 30 October 2016, Central Italy Earthquake

Neogene and Quaternary rollback evolution of the Tyrrhenian Sea, the Apennines, and the Sicilian Maghrebides

The Main Results of ODP Leg 107 in the Frame of Neogene to Recent Geology of Perityrrhenian Areas

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The Umbria-Marche arcuate fold belt (Italy)

Cited by 54 publications

References 10 publications

Complex Fault Geometry and Rupture Dynamics of the MW 6.5, 30 October 2016, Central Italy Earthquake

Complex Fault Geometry and Rupture Dynamics of the MW 6.5, 30 October 2016, Central Italy Earthquake

Neogene and Quaternary rollback evolution of the Tyrrhenian Sea, the Apennines, and the Sicilian Maghrebides

The Main Results of ODP Leg 107 in the Frame of Neogene to Recent Geology of Perityrrhenian Areas

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Complex Fault Geometry and Rupture Dynamics of the M_W 6.5, 30 October 2016, Central Italy Earthquake

Complex Fault Geometry and Rupture Dynamics of the M_W 6.5, 30 October 2016, Central Italy Earthquake