Quantitative analysis of extensional joints in the southern Adriatic foreland (Italy), and the active tectonics of the Apulia region

Bucci, Daniela Di; Caputo, Riccardo; Mastronuzzi, Giuseppe; Fracassi, Umberto; Selleri, Gianluca; Sansò, Paolo

doi:10.1016/j.jog.2010.01.012

Cited by 26 publications

(15 citation statements)

References 54 publications

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“…The analysis of extension joint sets based on the inversion technique proposed by Caputo and Caputo [] or other approaches allowed to constrain the tectonic setting and better define the geodynamic evolution in several Mediterranean regions [ Caputo and Pavlides , ; Arlegui and Simon , ; Arlegui et al ., , ; Di Bucci et al ., ]. Similarly, the present study, focusing on joint sets and fracture grid‐lock systems, allows to document the existence of an extensional tectonic regime whose activity is younger than Middle Pleistocene.…”

Section: Discussionmentioning

confidence: 99%

Regional and local stress field orientation inferred from quantitative analyses of extension joints: Case study from southern Italy

2013

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[1] An intense tectonic activity in eastern Sicily and southern Calabria (Italy) is well documented by the differential uplift of Late Quaternary coastlines and by the record of the strong historical earthquakes. The extensional belt that crosses this area is dominated by a well-established WNW-ESE-oriented stretching direction. However, this area is largely lacking of any structural analysis for defining the tectonics at a more local scale. The analysis of systematic extension joint sets affecting Pleistocene deposits presented in this paper allows to infer the causative tectonic stress tensor by means of a quantitative inversion technique. Local perturbations of the first-order regional stress field are consequently recognized. Such perturbations are interpreted as due to interferences between large active faults and their particular geometrical setting. These results contribute to the understanding of the Quaternary tectonic evolution and the present-day stress regime.

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Section: Discussionmentioning

confidence: 99%

Regional and local stress field orientation inferred from quantitative analyses of extension joints: Case study from southern Italy

2013

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“…• Supporting Information S1 • Table S1 • Table S2 • Table S3 • Table S4 • Table S5 • Table S6 Di Bucci et al (2011) suggested that after the Late Pleistocene, a sort of radial extension is detectable, indicating a doming of the foreland area replacing the Middle Pleistocene SW-NE extension. The doming is the consequence of the coexistence of SW-NE contraction due to the advancing two chains combined with the northward push of the African plate.…”

Section: Supporting Informationmentioning

confidence: 99%

“…The structural analysis of the Quaternary fracture systems affecting the Salento Peninsula suggests a dominant extensional tectonic regime. This might be characterized by triaxial stress during Early and Middle Pleistocene (Di Bucci et al, 2011) in which a change of the vertical stress axis between σ1 and σ2 cannot be ruled out. This change would be compatible with the development of transtensive structures.…”

Section: 1029/2020tc006116mentioning

confidence: 99%

Active Extension in a Foreland Trapped Between Two Contractional Chains: The South Apulia Fault System (SAFS)

et al. 2020

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The response of continental forelands to subduction and collision is a widely investigated topic in geodynamics. The deformation occurring within a foreland shared by two opposite‐verging chains, however, is uncommon and poorly understood. The Apulia Swell in the southern end of the Adria microplate (Africa‐Europe plate boundary, central Mediterranean Sea) represents one of these cases, as it is the common foreland of the SW verging Albanides‐Hellenides and the NE verging Southern Apennines merging into the SSE verging Calabrian Arc. We investigated the internal deformation of the Apulia Swell using multiscale geophysical data: multichannel seismic profiles recording up to 12‐s two‐way time (TWT) for a consistent image of the upper crust; high‐resolution multichannel seismic profiles, high‐resolution multibeam bathymetry, and CHIRP profiles acquired by R/V OGS Explora to constrain the Quaternary geological record. The results of our analyses characterize the geometry of the South Apulia Fault System (SAFS), a 100‐km‐long and 12‐km‐wide structure attesting an extensional (and possibly transtensional) response of the foreland to the two contractional fronts. The SAFS consists of two NW‐SE right‐stepping master faults and several secondary structures. The SAFS activity spans from the Early Pleistocene through the Holocene, as testified by the bathymetric and high‐resolution seismic data, with long‐term slip rates in the range of 0.2–0.4 mm/yr. Considering the position within an area with few or none other active faults in the surroundings, the dimension, and the activity rates, the SAFS can be a candidate causative fault of the 20 February 1743, M 6.7, earthquake.

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“…Throughout its history, the region has been hit by tsunamis, which have been investigated through distinctive deposits (De Martini et al, 2003) and modeled to infer the location of their causative source(s) (Paulatto et al, 2007;Tiberti et al, 2009). Finally, recent studies have highlighted weak yet detectable brittle deformation of Middle-Late Pleistocene age in nearly aseismic southern Apulia (Di Bucci, Coccia, et al, 2009;Di Bucci et al, 2011).…”

Section: Seismotectonic Setting Of the Adriatic Regionmentioning

confidence: 99%

Recasting Historical Earthquakes in Coastal Areas (Gargano Promontory, Italy): Insights from Marine Paleoseismology

Fracassi¹,

Bucci²,

Ridente³

et al. 2012

Bulletin of the Seismological Society of America

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Historical earthquakes of the Gargano Promontory, an uplifted foreland sector in southeastern Italy, have been usually regarded as generated by inland faults. Some have been associated with activity of the Mattinata fault, a section of a regional east-west shear zone. The 10 August 1893 M w 5.4 event is one such earthquake, but its current onshore location is only loosely based on the damage pattern.Regions that were hit by offshore earthquakes are also known to be affected by a methodological bias such that offshore historical events appear to be located onshore. To test this condition for the 1893 earthquake, we pursued an alternative hypothesis for its location. The earthquake occurred near the Gondola fault zone, a right-lateral active fault system representing the offshore counterpart of the Mattinata fault and hence capable of producing sizable earthquakes along the Gargano coast. We focused on its westernmost segment, suggesting that it could be the causative fault of the 1893 earthquake (in agreement with both the damage distribution and reported environmental effects).The approach we present works side by side with the recent developments of the algorithms used to compile historical catalogs, providing a fine-scale, geologically based method to define or confirm the dubious location of historical earthquakes. Marine paleoseismology is a new field stemming from the increased capabilities of high-resolution marine techniques in supporting classical paleoseismological analyses for the exploration of the seismogenic potential of offshore faults. Based on Late Pleistocene and Holocene individual or cumulative earthquake records, the potential of offshore faults can now be constrained in terms of expected magnitude and recurrence intervals.We stress the importance of revisiting historical earthquakes in coastal zones using marine paleoseismological data to assess regional seismic hazard, particularly in tectonic settings where regional-size seismogenic areas straddle the onshore and the onshore-offshore zone.

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Quantitative analysis of extensional joints in the southern Adriatic foreland (Italy), and the active tectonics of the Apulia region

Cited by 26 publications

References 54 publications

Regional and local stress field orientation inferred from quantitative analyses of extension joints: Case study from southern Italy

Regional and local stress field orientation inferred from quantitative analyses of extension joints: Case study from southern Italy

Active Extension in a Foreland Trapped Between Two Contractional Chains: The South Apulia Fault System (SAFS)

Recasting Historical Earthquakes in Coastal Areas (Gargano Promontory, Italy): Insights from Marine Paleoseismology

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