Geometry, segmentation pattern and displacement variations along a major Apennine thrust zone, central Italy

Mazzoli, Stefano; Pierantoni, Pietro Paolo; Borraccini, F.; Paltrinieri, Werter; Deiana, Giovanni

doi:10.1016/j.jsg.2005.06.002

Cited by 98 publications

(81 citation statements)

References 20 publications

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“…For the same area seismic tomography and receiver functions studies recover a slightly minor thickness (∼6 km) for the same units. While in the Campotosto area, located to the north of the western termination of the W-E trending Gran Sasso thrust system, commercial reflection profiles image a system of NNW-SSE trending fault propagation folds, involving Triassic-Miocene sedimentary succession referable to the well know Umbria-Marche basinal domain (northern Apennines, Figure 2) [Mazzoli et al, 2005]. These are the same tectonic units where the Colfiorito normal fault system located 50 km to the north, nucleated in 1997 [Chiaraluce et al, 2003, Figure 1].…”

Section: Discussionmentioning

confidence: 99%

The anatomy of the 2009 L'Aquila normal fault system (central Italy) imaged by high resolution foreshock and aftershock locations

et al. 2011

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[1] On 6 April (01:32 UTC) 2009 a M W 6.1 normal faulting earthquake struck the axial area of the Abruzzo region in central Italy. We study the geometry of fault segments using high resolution foreshock and aftershock locations. Two main SW dipping segments, the L'Aquila and Campotosto faults, forming an en echelon system 40 km long (NW trending). The 16 km long L'Aquila fault shows a planar geometry with constant dip (∼48°) through the entire upper crust down to 10 km depth. The Campotosto fault activated by three events with 5.0 ≤ M W ≤ 5.2 shows a striking listric geometry, composed by planar segments with different dips along depth rather than a smoothly curving single fault surface. The investigation of the spatiotemporal evolution of foreshock activity within the crustal volume where the subsequent L'Aquila main shock nucleated allows us to image the progressive activation of the main fault plane. From the beginning of 2009 the foreshocks activated the deepest portion of the fault until a week before the main shock, when the largest foreshock (M W 4.0) triggered a minor antithetic segment. Seismicity jumped back to the main plane a few hours before the main shock. Secondary synthetic and antithetic fault segments are present both on the hanging and footwall of the system. The stress tensor obtained by inverting focal mechanisms of the largest events reveals a NE trending extension and the majority of the aftershocks are kinematically consistent. Deviations from the dominant extensional strain pattern are observed for those earthquakes activating minor structures.

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Section: Discussionmentioning

confidence: 99%

The anatomy of the 2009 L'Aquila normal fault system (central Italy) imaged by high resolution foreshock and aftershock locations

et al. 2011

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“…This "schematic" structural setting is complicated by the presence of several east-verging thrusts which caused the overlapping of various levels of the sedimentary succession and the resulting genesis of the Umbria-Marche Apennine (Calamita & Deiana 1988;Mazzoli et al 2005;Pierantoni et al 2013). The genesis is associated with the intense Oligocene-Miocene compressive tectonics (active until the Pliocene), in the outermost sector (Bally et al 1986;Deiana & Pialli 1994;Calamita et al 2012;Di Domenica et al 2012) and to wide-ranging vertical movements, not related to the structural setting of bedrock (Dufaure et al 1989;Dramis 1992).…”

Section: Geological and Geomorphological Settingmentioning

confidence: 99%

“…The genesis is associated with the intense Oligocene-Miocene compressive tectonics (active until the Pliocene), in the outermost sector (Bally et al 1986;Deiana & Pialli 1994;Calamita et al 2012;Di Domenica et al 2012) and to wide-ranging vertical movements, not related to the structural setting of bedrock (Dufaure et al 1989;Dramis 1992). Normal faults with NW-SE trend, connected to a generalized tectonic uplift and the associated extensional phase (with maximum during the early and mid-Pleistocene) (Demangeot 1965;Ambrosetti et al 1982;Coltorti et al 1991;Mazzoli et al 2005) are mainly superimposed on the previous compressive structures: as a consequence, they generated, along the chain and its Tyrrhenian side, wide tectonic basins, tiered lowering of the relict surface, and tectonic-gravitational phenomena (Calamita et al 1994;Gentili & Pambianchi 1994;Materazzi et al 2014). Less frequent SSW-NNE faults, on the other hand, generated topographic "undulations" outlining three main transversal "ridges" (Fig.…”

Section: Geological and Geomorphological Settingmentioning

confidence: 99%

Pliocene –Pleistocene geomorphological evolution of the Adriatic side of Central Italy

Gentili¹,

Pambianchi²,

Aringoli³

et al. 2017

Geologica Carpathica

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This work is a significant contribution to knowledge of the Quaternary and pre-Quaternary morphogenesis of a wide sector of central Italy, from the Apennine chain to the Adriatic Sea. The goal is achieved through a careful analysis and interpretation of stratigraphic and tectonic data relating to marine and continental sediments and, mostly, through the study of relict limbs of ancient landscapes (erosional surfaces shaped by prevailing planation processes). The most important scientific datum is the definition of the time span in which the modelling of the oldest morphological element (the "summit relict surface") occurred: it started during Messinian in the westernmost portion and after a significant phase during middle-late Pliocene, ended in the early Pleistocene. During the middle and late Pleistocene, the rapid tectonic uplift of the area and the climate fluctuations favoured the deepening of the hydrographic network and the genesis of three orders of fluvial terraces, thus completing the fundamental features of the landscape. The subsequent Holocene evolution reshaped the minor elements, but not the basic ones.

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“…These anticlines are separated by narrow, often markedly asymmetric, synclines. The Umbria-Romagna-Marche Apennines have been traditionally considered to be a thin-skinned thrust-and-fold chain (Bally et al 1988, and references therein), but more recently, a deformation involving the Hercynian basement has been pointed out (Lavecchia et al 1994;Barchi et al 1998;Coward et al 1999;Mazzoli et al 2001Mazzoli et al , 2005.…”

Section: Geological Frameworkmentioning

confidence: 99%

The Early Miocene “Bisciaro volcaniclastic event” (northern Apennines, Italy): a key study for the geodynamic evolution of the central-western Mediterranean

Guerrera

Martı́n-Martı́n

Raffaelli

et al. 2015

Int J Earth Sci (Geol Rundsch)

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recognizable in different tectonic units of the Apennines, Maghrebian, and Betic Chains show petrofacies and chemical-geochemical features related to a similar calc-alkaline magmatism. The characterization of this event led to the hypothesis of a co-genetic relationship between volcanic activity centres (primary volcanic systems) and depositional basins (depositional processes) in the Early Miocene palaeogeographic and palaeotectonic evolution of the central-western Mediterranean region. The results support the proposal of a geodynamic model of this area that considers previously proposed interpretations.

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Geometry, segmentation pattern and displacement variations along a major Apennine thrust zone, central Italy

Cited by 98 publications

References 20 publications

The anatomy of the 2009 L'Aquila normal fault system (central Italy) imaged by high resolution foreshock and aftershock locations

The anatomy of the 2009 L'Aquila normal fault system (central Italy) imaged by high resolution foreshock and aftershock locations

Pliocene –Pleistocene geomorphological evolution of the Adriatic side of Central Italy

The Early Miocene “Bisciaro volcaniclastic event” (northern Apennines, Italy): a key study for the geodynamic evolution of the central-western Mediterranean

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