THE RECENT (MIOCENE‐QUATERNARY) REGMATIC SYSTEM OF THE WESTERN MEDITERRANEAN REGION: A New Model of Ensialic Geodynamic Evolution, in a Context of Plastic/Rigid Deformation

Boccaletti, M.; Conedera, C.; Dainelli, P.; Gočev, P.

doi:10.1111/j.1747-5457.1982.tb00559.x

Cited by 59 publications

(7 citation statements)

References 23 publications

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“…There are strips of Ligurian Units and Sub-Ligurian Units somewhere (i.e., Cretaceous "Argille a Palombini" Formation). Finally, the neo-autochthonous deposits and recent continental sediments close the stratigraphic sequence [44,45] ( Figure 1b). Figure 1.…”

Section: Study Areamentioning

confidence: 87%

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Ground Subsidence Susceptibility (GSS) Mapping in Grosseto Plain (Tuscany, Italy) Based on Satellite InSAR Data Using Frequency Ratio and Fuzzy Logic

et al. 2019

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This study aimed at evaluating and mapping Ground Subsidence Susceptibility (GSS) in the Grosseto plain (Tuscany Region, Italy) by exploiting multi-temporal satellite InSAR data and by applying two parallel approaches; a bivariate statistical analysis (Frequency Ratio) and a mathematical probabilistic model (Fuzzy Logic operator). The Grosseto plain experienced subsidence and sinkholes due to natural causes in the past and it is still suffering slow-moving ground lowering. Five conditioning subsidence-related factors were selected and managed in a GIS environment through an overlay pixel-by-pixel analysis. Firstly, multi-temporal ground subsidence inventory maps were prepared in the study area by starting from two inventories referred to distinct temporal intervals (2003–2009 and 2014–2019) derived from Persistent Scatterers Interferometry (PSI) data of ENVISAT and SENTINEL-1 satellites. Then, the susceptibility modelling was performed through the Frequency Ratio (FR) and Fuzzy Logic (FL) approaches. These analyses led to slightly different scenarios which were compared and discussed. Results show that flat areas on alluvial and colluvial deposits with thick sedimentary cover (higher than 20 m) on the bedrock in the central and eastern sectors of the plain are the most susceptible to land subsidence. The obtained FR- and FL-based GSS maps were finally validated with a ROC (Receiver Operating Characteristic) analysis, in order to estimate the overall performance of the models. The AUC (Area Under Curve) values of ROC analysis of the FR model were higher than the ones of FL model, suggesting that the former is a better and more appropriate predictor for subsidence susceptibility analysis in the study area. In conclusion, GSS maps provided a qualitative overview of the subsidence scenarios and may be helpful to predict and preliminarily identify high-risk areas for environmental local authorities and decision makers in charge of land use planning in the study area. Finally, the presented methodologies to derive GSS maps are easily reproducible and could also be applied and tested in other test sites worldwide, in order to check the modeling performance in different environmental settings.

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Section: Study Areamentioning

confidence: 87%

“…In particular, the rocks formations surrounding the plain mainly belong to the Tuscan Complex (Triassic-Oligocene) consisting in limestones, sandstones, quartzites, siltstones and cherts [46,47]. The floodplain loose sediments (Neogene-Quaternary) of the plain mainly consist of silts, clays with gravels and sands [44].…”

Section: Study Areamentioning

confidence: 99%

Ground Subsidence Susceptibility (GSS) Mapping in Grosseto Plain (Tuscany, Italy) Based on Satellite InSAR Data Using Frequency Ratio and Fuzzy Logic

et al. 2019

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“…An alternative mechanism is the northward indentation of the African plate and consequent eastward lateral extrusion [Tapponnier, 1977' Boccaletti et al, 1982Mantovani et al, 1996]. The main points against this mechanism is that the rate of lateral extrusion is 3 to 5 times higher than the rate of indentation.…”

Section: Migration Of Compression Exhumation Extension Basin Formamentioning

confidence: 99%

Midcrustal shear zones in postorogenic extension: Example from the northern Tyrrhenian Sea

Jolivet¹,

Faccenna²,

Goffé³

et al. 1998

J. Geophys. Res.

485

506

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“…The forces controlling the opening of several Mediterranean back arc basins have been intensively studied during the last decade. Three main types of processes have been proposed to explain the existence of contemporaneous and parallel extension regimes in the Tyrrhenian Sea and the Apennine orogen: (1) N‐S shortening induced by the convergence of Africa and Europe [ Tapponnier , 1977; Boccaletti et al , 1982]; (2) passive retreating subduction of the Ionian‐Adriatic domain [ Malinverno and Ryan , 1986], later referred as “rollback” of the subducting slab; and (3) gravitational eastward collapse of the thickened Apenninic lithosphere [ Channell and Mareschal , 1989]. A study using experimental modeling concludes that the three mechanisms must be combined in order to simulate the tectonics of the Tyrrhenian‐Apennine system satisfactorily [ Faccenna et al , 1996].…”

Section: Introductionmentioning

confidence: 99%

Back arc extension, tectonic inheritance, and volcanism in the Ligurian Sea, Western Mediterranean

et al. 2002

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[1] The Ligurian basin, western Mediterranean Sea, has opened from late Oligocene to early Miocene times, behind the Apulian subduction zone and partly within the western Alpine belt. We analyze the deep structures of the basin and its conjugate margins in order to describe the tectonic styles of opening and to investigate the possible contributions of forces responsible for the basin formation, especially the pulling force induced by the retreating subduction hinge and the gravitational body force from the Alpine wedge. To undertake this analysis, we combine new multichannel seismic reflection data (Malis cruise, 1995) with other geophysical data (previous multichannel and monochannel seismic sections, magnetic anomalies) and constrain them by geological sampling from two recent cruises (dredges from Marco cruise, 1995, and submersible dives from Cylice cruise, 1997). From an analysis of basement morphology and seismic facies, we refine the extent of the different domains in the Ligurian Sea: (1) the continental thinned margins, with strong changes in width and structure along strike and on both sides of the ocean; (2) the transitional domain to the basin; and (3) a narrow, atypical oceanic domain. Margin structures are characterized by few tilted blocks along the narrow margins, where inherited structures seem to control synrift sedimentation and margin segmentation. On the NW Corsican margin, extension is distributed over more than 120 km, including offshore Alpine Corsica, and several oceanward faults sole on a relatively flat reflector. We interpret them as previous Alpine thrusts reactivated during rifting as normal faults soling on a normal ductile shear zone. Using correlations between magnetic data, seismic facies, and sampling, we propose a new map of the distribution of magmatism. The oceanic domain depicts narrow, isolated magnetic anomalies and is interpreted as tholeitic volcanics settled within an unroofed upper mantle, whereas calcalkaline volcanism appears to be discontinuous but massive and has jumped in space and time, from the beginning of rifting on the Ligurian margin ($30 Ma), toward the Corsican margin at the end of the Corsica-Sardinia block rotation ($16 Ma). This space and time shift reveals the importance of the rollback of the Apulian slab and of the migration of the Alpine-Apennines belt front toward the E-SE for driving basin formation. We also state that initial rheological conditions and inherited crustal fabric induce important changes in the styles of deformation observed along margins and between conjugate margins. In the NE Ligurian basin the prerift Alpine crustal thickening together with slow rollback velocity likely contribute to distribute strain across the whole NW Corsican margin, whereas farther south the inherited Hercynian structural pattern combined with a faster rollback of the subducting plate tend to focus the extension at the foot of the margin, up to the Sardinian rift which ends within the SW Corsican margin. Therefore the mode of opening and the margin struct...

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THE RECENT (MIOCENE‐QUATERNARY) REGMATIC SYSTEM OF THE WESTERN MEDITERRANEAN REGION: A New Model of Ensialic Geodynamic Evolution, in a Context of Plastic/Rigid Deformation

Cited by 59 publications

References 23 publications

Ground Subsidence Susceptibility (GSS) Mapping in Grosseto Plain (Tuscany, Italy) Based on Satellite InSAR Data Using Frequency Ratio and Fuzzy Logic

Ground Subsidence Susceptibility (GSS) Mapping in Grosseto Plain (Tuscany, Italy) Based on Satellite InSAR Data Using Frequency Ratio and Fuzzy Logic

Midcrustal shear zones in postorogenic extension: Example from the northern Tyrrhenian Sea

Back arc extension, tectonic inheritance, and volcanism in the Ligurian Sea, Western Mediterranean

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