Magnetic and gravimetric modeling of the central Adriatic region

Mancinelli, Paolo; Pauselli, Cristina; Minelli, Giorgio; Federico, C.

doi:10.1016/j.jog.2015.06.008

Cited by 15 publications

(9 citation statements)

References 31 publications

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“…Moreover, if the gravity anomaly was related to foreland dynamics, it should run subparallel to the orogenic front like in the Pelagian foreland (Moretti & Royden, ). By contrast, voluminous crustal mafic intrusions previously evoked for the Hyblean region (Atzori et al, ; Schmincke et al, ; Yellin‐Dror et al, ) and evidenced nearby in the Sicily Channel (Civile et al, ; Lodolo et al, ) should also be associated to positive gravity anomalies as observed in the SW Iberia margin (Neres et al, ) or in the Adriatic region (Mancinelli et al, ).…”

Section: Discussionmentioning

confidence: 90%

Deep Origin of the Dome‐Shaped Hyblean Plateau, Southeastern Sicily: A New Tectono‐Magmatic Model

et al. 2019

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Southeastern Sicily is characterized by a prominent topography known as the Hyblean Plateau.It is commonly considered as a flexural bulge formed by the northwest plunging of the Hyblean-Malta platform beneath the Sicilian Fold and Thrust Belt. However its noncylindrical shape and multiphase uplift history correlated to the Late Miocene and Plio-Pleistocene volcanism outline a possible magmatic control on the Hyblean Plateau topographic expression. We argue, using 2-D flexural models, that the flexural bending alone is unlikely to explain the high anomalous elevation of the Hyblean Plateau. Moreover, topographic analysis show that the Hyblean Plateau has a dome shape composed of radially tilted preserved surfaces defining individual blocks. The block edges seem to be related to deep-seated inherited faults. Using an analogue modeling approach, we show that magmatic intrusions beneath the thick Meso-Cenozoic sedimentary cover can reproduce the first-order morphology of the Hyblean Plateau when a structural inheritance is imposed. Accordingly, we propose a tectono-magmatic model that favors mafic sill intrusions as the major uplift source for the topographic anomaly. However, to explain the strong positive Bouguer anomaly, a deeper high-density intracrustal body is needed. Moho uprising related to Mesozoic rifting or mafic lower crust underplating/intraplating since the Late Cretaceous can be evoked. The small wavelength of the topography and the deep intracrustal mass anomaly makes the lithospheric elastic stresses sufficiently high to maintain a nonisostatic state over the geological time scales.Plain Language Summary A prominent dome-shaped topography known as the Hyblean Plateau overcomes southeastern Sicily. It is commonly considered as originated from foreland flexural bulging of the Hyblean-Malta platform in response to the southeastward migrating Sicilian orogenic wedge. However, its nonlinear shape and its multiphase uplift history correlate to the Late Miocene and Plio-Pleistocene volcanic activity and hence suggest a possible magmatic control on the formation of the Hyblean Plateau. We show that flexural bending alone is unlikely to explain the subcircular topography of the Hyblean Plateau using 2-D flexural models. Moreover, subsurface analysis coupled to an analogue modeling approach shows that the subcircular pattern is subdivided into radially tilted blocks whose edges seem to be related to inherited fault zones. The tectono-magmatic model proposed here minimizes the flexural component to the Hyblean rise and prefers mafic sill intrusions in the upper crust as the major uplift source. However, gravity anomalies suggest a deeper high-density intracrustal body beneath the Hyblean Plateau which can be related to the Meso-Cenozoic history. The lack of isostatic equilibrium in this region can be related to the small length scale of the topography and the inferred intracrustal high-density body which makes the lithosphere rigid enough to support these anomalies.

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Section: Discussionmentioning

confidence: 90%

Deep Origin of the Dome‐Shaped Hyblean Plateau, Southeastern Sicily: A New Tectono‐Magmatic Model

et al. 2019

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“…More recently, Luiso et al (2018) used multiscale gravity analyses to evaluate the geometry of the active master faults in the area. The area interested by the 2016-2017 seismicity has not been investigated for magnetic modeling in the past, but it was only partially investigated by studies focused on the Adriatic foreland (Mancinelli et al, 2015) and Northern and Southern Apennines (Arisi Rota & Fichera, 1987;Cassano et al, 2001;Speranza & Chiappini, 2002).…”

Section: Geochemistry Geophysics Geosystemsmentioning

confidence: 99%

“…The models are constructed from a new Bouguer anomaly map and magnetic anomaly map by Caratori Tontini et al (2004). The geometries of the main crustal bodies are based on the geological model of Porreca et al (2018), and the petrophysical parameters were retrieved from previous works investigating the area or its surroundings through modeling (Arisi Rota & Fichera, 1987;Cassinis et al, 1991;Di Luzio et al, 2009;Mancinelli et al, 2015;Mattei et al, 1997;Minelli et al, 2018;Pauselli & Federico, 2003;Pauselli & Ranalli, 2017;Scarascia et al, 1998;Speranza & Chiappini, 2002) or petrophysical properties of the investigated units retrieved from sonic logs (Montone & Mariucci, 2015) and directly measured in laboratory (Trippetta et al, 2010). Results contribute to locating the depth of the basement in the study area and provide insights into the mechanisms controlling the depth of the seismogenic layer in extensional postorogenic settings.…”

Section: Geochemistry Geophysics Geosystemsmentioning

confidence: 99%

“…In this step we compiled and organized the physical properties of the geological units involved in the modeling to constrain the modeled blocks. Considering the lack (see Figure S1 in the supporting information) of sonic logs from borehole data in the area crossed by the sections (the Amandola1 well reports no sonic log), values of density (ρ) and magnetic susceptibility (k) of the investigated units were derived from previous studies that used forward modeling on gravity and/or magnetic anomalies (e.g., Arisi Rota & Fichera, 1987;Cassinis et al, 1991;Di Luzio et al, 2009;Mancinelli et al, 2015;Scarascia et al, 1998;Speranza & Chiappini, 2002). Additional information was derived from studies using seismic velocities to retrieve densities used in finite element models (e.g., Pauselli & Federico, 2003), from sonic velocity from 64 boreholes drilling the same units investigated here but in the Northern Apennines and Po Plain (e.g., Montone & Mariucci, 2015, and references therein), or from direct measurements on samples of Triassic Evaporites (Trippetta et al, 2010) and of Neogene and Quaternary basins (Mattei et al, 1997) or in the Quaternary L'Aquila and Sulmona basins (Macrì et al, 2016;Minelli et al, 2018, and references therein).…”

Section: 1029/2018gc008002mentioning

confidence: 99%

“…The composition and rock types that form the basement and its magnetic properties are also uncertain and still a matter of debate (e.g., Arisi Rota & Fichera, ; Bally et al, ; Speranza & Chiappini, ) even if most of the authors agree with a basement characterized by high magnetic susceptibility ( k ) values with respect to the sedimentary cover (e.g., Mancinelli et al, ; Mattei et al, ; Minelli et al, ; Speranza & Chiappini, ). Recent models (Minelli et al, ) in the L'Aquila and Sulmona basins, located respectively ~50 and 80 km SE of the study area, proposed a deep origin for the magnetic anomaly in the area, without other significant contributions from the basement or upper crust.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gravity and Magnetic Modeling of Central Italy: Insights Into the Depth Extent of the Seismogenic Layer

Mancinelli

Porreca

Pauselli

et al. 2019

Geochem Geophys Geosyst

Self Cite

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The recent 2016–2017 seismic sequence in Central Italy has prompted the investigation of several geological and geophysical data in order to derive more accurate subsurface geological models. We present the results of combined gravity and magnetic modeling performed along three sections crossing the area of the seismic sequence in order to evaluate the geological parameters controlling or affecting the thickness of the seismogenic layer of this part of the Apennines. The models are constructed using all the available geological and petrophysical constraints derived from previous studies. Resulting models are consistent with the top of the basement located at 8‐ to 12‐km depth and contribute to the geological and geophysical understanding of the area investigating the role of the basement in the seismic events. The basement, involved in Miocene thrusting, formed the base of seismicity for the recent seismic sequence in the area. Moreover, the models provide information about the nature and composition of the basement and lower crust. Finally, these findings contribute in the investigation of the mechanisms controlling the thickness of the seismogenic layer in extensional postorogenic scenarios.

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Deep geometry of Triassic evaporite bodies associated with the Bazina structure, North Tunisia: new insights from gravity modeling

Atawa,

Zouaghi

2024

Acta Geophys.

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Magnetic and gravimetric modeling of the central Adriatic region

Cited by 15 publications

References 31 publications

Deep Origin of the Dome‐Shaped Hyblean Plateau, Southeastern Sicily: A New Tectono‐Magmatic Model

Deep Origin of the Dome‐Shaped Hyblean Plateau, Southeastern Sicily: A New Tectono‐Magmatic Model

Gravity and Magnetic Modeling of Central Italy: Insights Into the Depth Extent of the Seismogenic Layer

Deep geometry of Triassic evaporite bodies associated with the Bazina structure, North Tunisia: new insights from gravity modeling

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