Stratigraphic versus structural control on the deformation pattern associated with the evolution of the Mt. Catria anticline, Italy

Tavani, Stefano; Storti, Fabrizio; Salvini, Francesco; Toscano, Claudio

doi:10.1016/j.jsg.2008.01.011

Cited by 68 publications

(56 citation statements)

References 52 publications

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“…The velocity model close to the Burano 1 well indicates V P =5 km/s [ Trippetta et al , ] evaporitic rocks at 600 m depth, strongly consistent with borehole data. In our model, the high‐ V P anomaly in the NE at shallow depth (B) correlates with the Calcareous ridge and its compressional structure as seen from active seismic profiles [ Tavani et al , ]. The V p model close to the Monte Civitello well shows velocity of 3.8–4 km/s overlaying a steep gradient at 1–2 km depth with velocities up to 6.2 km/s a 2 km depth.…”

Section: Resultsmentioning

confidence: 99%

Seismic swarms and diffuse fracturing within Triassic evaporites fed by deep degassing along the low‐angle Alto Tiberina normal fault (central Apennines, Italy)

2017

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We present high‐resolution elastic models and relocated seismicity of a very active segment of the Apennines normal faulting system, computed via transdimensional local earthquake tomography (trans‐D LET). Trans‐D LET, a fully nonlinear approach to seismic tomography, robustly constrains high‐velocity anomalies and inversions of P wave velocity, i.e., decreases of VP with depth, without introducing bias due to, e.g., a starting model, and giving the possibility to investigate the relation between fault structure, seismicity, and fluids. Changes in seismicity rate and recurring seismic swarms are frequent in the Apennines extensional belt. Deep fluids, upwelling from the delaminating continental lithosphere, are thought to be responsible for seismicity clustering in the upper crust and lubrication of normal faults during swarms and large earthquakes. We focus on the tectonic role played by the Alto Tiberina low‐angle normal fault (ATF), finding displacements across the fault consistent with long‐term accommodation of deformation. Our results show that recent seismic swarms affecting the area occur within a 3 km thick, high VP/VS, densely cracked, and overpressurized evaporitic layer, composed of dolostones and anhydrites. A persistent low VP, low VP/VS volume, present on top of and along the ATF low‐angle detachment, traces the location of mantle‐derived CO2, the upward flux of which contributes to cracking within the evaporitic layer.

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Section: Resultsmentioning

confidence: 99%

Seismic swarms and diffuse fracturing within Triassic evaporites fed by deep degassing along the low‐angle Alto Tiberina normal fault (central Apennines, Italy)

2017

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“…The correspondence between deformation pattern and structural position is a diagnostic feature of syn-folding structures (e.g. Sanderson, 1982;Srivastava and Engelder, 1990;Tavani et al, 2006Tavani et al, , 2008Thorbjornsen and Dunne, 1997). The syn-folding origin is further confirmed by abutting relationships observed at the transition between N-S and Central Anaran sectors, where longitudinal extensional faults of Central Anaran stop against (and thus postdate) the syn-folding N-S striking faults of the N-S Anaran sector.…”

Section: Discussionmentioning

confidence: 68%

“…σx may continue to increase at this stage (T 2 ), as documented in several thrust related anticlines (e.g. Tavani et al, 2008Tavani et al, , 2012. This occurs until a certain time T 3 is reached, when uplift causes fast migration of the material towards shallower structural levels.…”

Section: Discussionmentioning

confidence: 84%

“…Rutter, 1976Rutter, , 1983. In addition, the documented occurrence of less intense (compared to the limb) compressive fracturing in the crest of anticlines (Tavani et al, 2008 and along-dip gravitational collapse in the shallower levels of folds (e.g. Morley, 2007) shows that even in the absence of any stress to be released, the shallower levels of growing anticlines can be characterised by a significant reduction of compressive stress.…”

Section: Discussionmentioning

confidence: 99%

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Uplift-induced residual strain release and late-thrusting extension in the Anaran mountain front anticline, Zagros (Iran)

2014

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“…The arcuate shape of salients and recesses is typically accompanied by noncylindrical deformations and partitioning between dip‐slip and strike‐slip faulting [e.g., Marshak , ]. In such a geological framework, the expected fold‐related deformation pattern may significantly deviate from the classical longitudinal and transversal distribution of deformation structures [e.g., Stearns , ; Storti and Salvini , ] described in cylindrical thrust‐related folds [e.g., Hancock , ; Cooper , ; Tavani et al ., , ]. Given the importance that fault‐fold growth in thrust‐fold belts and accretionary prisms has for both economical and seismic hazard mitigation purposes, descriptions of the kinematic evolution of anticlines developed within thrust salients and recesses can provide effective analogs to support predictions of deformation patterns and related fluid flow in comparable subsurface settings.…”

Section: Introductionmentioning

confidence: 99%

Complex fault-fold interactions during the growth of the Jabal Qusaybah anticline at the western tip of the Salakh Arch, Oman

et al. 2015

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The Jabal Qusaybah anticline is located at the western end of the Salakh Arch, a major salient in the foothills of the Oman Mountains. We performed a structural and petrographical-geochemical study of vein sets and fault zones associated with the development of this anticline. Our data illustrate a complex deformation pattern both in space and time, characterized by the unusual presence of widespread NE-SW left-lateral strike-slip fault zones trending oblique to the E-W fold axial strike, and of abundant and well-developed N-S fold-perpendicular extensional fault zones associated with axial bulging and dilation, well developed in the central region of the anticlinal crest. We propose a three-stage evolution for the Jabal Qusaybah anticline, starting with prefolding jointing in the foreland of the late Cretaceous Oman Mountains, and followed by development of extensional faulting in Campanian times. Positive inversion of the Qusaybah Fault, possibly in Miocene times, caused development of a layer-parallel shortening fabric and amplification the Jabal Qusaybah Anticline, in concomitance with the activity of NE-SW left-lateral strike-slip fault zones that triggered N-S, fold-perpendicular extensional faulting, particularly in the axial bump of the anticline. The final evolutionary stage was characterized by further amplification of the axial bump and related N-S extensional fracturing and by uplift and exhumation. To explain the complex noncylindrical fault-fold interactions in the study anticline, we tentatively propose that they were triggered by near foredeep-parallel tapering of the sedimentary/tectonic overburden of the Ara evaporites.

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Stratigraphic versus structural control on the deformation pattern associated with the evolution of the Mt. Catria anticline, Italy

Cited by 68 publications

References 52 publications

Seismic swarms and diffuse fracturing within Triassic evaporites fed by deep degassing along the low‐angle Alto Tiberina normal fault (central Apennines, Italy)

Seismic swarms and diffuse fracturing within Triassic evaporites fed by deep degassing along the low‐angle Alto Tiberina normal fault (central Apennines, Italy)

Uplift-induced residual strain release and late-thrusting extension in the Anaran mountain front anticline, Zagros (Iran)

Complex fault-fold interactions during the growth of the Jabal Qusaybah anticline at the western tip of the Salakh Arch, Oman

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