New kinematic constraints of the western Doruneh fault, northeastern Iran, from interseismic deformation analysis

Pezzo, Giuseppe; Tolomei, Cristiano; Atzori, Simone; Salvi, Stefano; Shabanian, Esmaeil; Bellier, Olivier; Farbod, Yassaman

doi:10.1111/j.1365-246x.2012.05509.x

Cited by 13 publications

(20 citation statements)

References 18 publications

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“…In order to estimate the current slip rate of the major identified faults, we simulated the surface deformation associated with an uniform slip over the regional thrust detachment, by using a simple 2‐D modeling approach, largely applied to different tectonic domains worldwide (e.g., Anderlini et al, 2020; Fialko, 2006; Pezzo et al, 2012; Ponraj et al, 2019; Vergne et al, 2001). The computation of a 2‐D profile model allowed us to simulated an infinite wide (perpendicular to the profile) regional thrust detachment, avoiding lateral deformation effects (Figure 6).…”

Section: Methodsmentioning

confidence: 99%

Active Fold‐Thrust Belt to Foreland Transition in Northern Adria, Italy, Tracked by Seismic Reflection Profiles and GPS Offshore Data

et al. 2020

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The Adria microplate is the foreland of the oppositely verging Apennines and Alps or Dinarides fold-thrust belts associated to the related subduction zones. Along its western margin, the Adria plate hosts the active Northern Apennines accretionary prism, which is buried under the Adriatic Sea and the Po Plain. The interpretation of seismic reflection profiles and borehole data allowed us to define the geometry of the transition from the Apennines fold-thrust belt to its undeformed foreland. Moreover, continuous GPS (CGPS) data from offshore hydrocarbon platforms anchored to the seabed of the northern Adriatic plate allow to measure present-day kinematics. Although the CGPS signals are affected by non-tectonic components associated with hydrocarbon extraction, the integration of geodetic analysis, subsurface geological reconstructions, and analytical modeling allowed us to constrain the ongoing tectonic activity. Shortening is currently accommodated by aseismic slip along the basal detachment, likely accumulating elastic energy along the frontal ramp that may eventually seismically slip. Our multidisciplinary study suggests that the study area may not be sheltered from relevant seismic sequences similar to the Mw 6 Emilia 2012 events and that the occurrence of potential seismogenic sources in the area should be carefully evaluated. Similar studies may be useful to constrain the present-day activity in other marine areas and to identify potential and hitherto unrecognized seismogenic sources along the entire Apennines belt and other accretionary prisms worldwide.

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Section: Methodsmentioning

confidence: 99%

Active Fold‐Thrust Belt to Foreland Transition in Northern Adria, Italy, Tracked by Seismic Reflection Profiles and GPS Offshore Data

et al. 2020

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“…The seismotectonic scenario of the study area is characterized by complex kinematics, varying from pure reverse to pure sinistral faulting, and fault segmentation (Farbod et al, ). The major seismogenic structures are observed to the north of the DF trace, corresponding to the NE‐SW sinistral faults (Dahan‐Qaleh and Taknar faults), and to the west of it, along the reverse, NW‐SE striking, Kharturan Fault (Farbod et al, , ; Fattahi et al, ; Pezzo et al, ) (Figure ).…”

Section: Geological Settingmentioning

confidence: 99%

The Post‐Eocene Evolution of the Doruneh Fault Region (Central Iran): The Intraplate Response to the Reorganization of the Arabia‐Eurasia Collision Zone

et al. 2017

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The Cenozoic deformation history of Central Iran has been dominantly accommodated by the activation of major intracontinental strike‐slip fault zones, developed in the hinterland domain of the Arabia‐Eurasia convergent margin. Few quantitative temporal and kinematic constraints are available from these strike‐slip deformation zones, hampering a full assessment of the style and timing of intraplate deformation in Iran and the understanding of the possible linkage to the tectonic reorganization of the Zagros collisional zone. This study focuses on the region to the north of the active trace of the sinistral Doruneh Fault. By combing structural and low‐temperature apatite fission track (AFT) and (U‐Th)/He (AHe) thermochronology investigations, we provide new kinematic and temporal constraints to the deformation history of Central Iran. Our results document a post‐Eocene polyphase tectonic evolution dominated by dextral strike‐slip tectonics, whose activity is constrained since the early Miocene in response to an early, NW‐SE oriented paleo‐σ1 direction. A major phase of enhanced cooling/exhumation is constrained at the Miocene/Pliocene boundary, caused by a switch of the maximum paleo‐σ1 direction to N‐S. When integrated into the regional scenario, these data are framed into a new tectonic reconstruction for the Miocene‐Quaternary time lapse, where strike‐slip deformation in the intracontinental domain of Central Iran is interpreted as guided by the reorganization of the Zagros collisional zone in the transition from an immature to a mature stage of continental collision.

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“…Geodetic measurements (Mousavi et al, ) and solutions of earthquake focal mechanism (Shabanian et al, ; Zamani, Angelier, & Zamani, ) suggest that the N‐S shortening is still active and responsible for the current stress regime and seismotectonic scenario within the DF region (see also Farbod et al, ). The seismotectonic scenario is characterized by fault segmentation and along‐strike kinematic variation from reverse to sinistral faulting along the DF, kinematically linked to the NE–SW sinistral Dahan‐Qaleh Fault and interrupted against the NNW–SSE‐oriented Kharturan reverse fault (Farbod et al, , ; Pezzo et al, ) (Figure ).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…The deformation zone thins towards the southwest, where the thickness of the deformation zone is about 6 km. It terminates against the NNW–SSE striking, active reverse Kharturan Fault, which is assumed to absorb the southwest motion of northern block of the DF to the west of the Dahan‐Qaleh Fault (Farbod et al, ; Pezzo et al, ). The deformation zone fades out toward the east, cutting across the middle Eocene KAIC (Tadayon et al, ).…”

Section: Structural Architecturementioning

confidence: 99%

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

et al. 2018

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A better understanding of intraplate deformation requires the knowledge of the space–time scales involved in its development and to decipher possible links with the dynamic evolution of the plate boundaries. Central Iran provides an ideal test site to approach this scientific issue, since it is characterised by a prolonged history of Mesozoic–Cenozoic intraplate deformation that has been interfering with the spatio‐temporal re‐organization of the Zagros convergence zone along the Eurasia plate boundary. This study focus on the Doruneh Fault (DF) region that is considered as the northern mechanical boundary of the Central East Iranian Microcontinent. By combining field investigations with apatite low‐temperature thermochronology, we present a revised tectono‐stratigraphic scenario for the DF region, typified by a punctuated history of fault‐related exhumation, burial and cooling history back to the Upper Cretaceous. When framed at regional scale, these results attest that the Zagros convergence zone, and its hinterland domain were fully mechanically coupled since ca. 40–35 Ma, a time lapse that is here referred as to the onset of continental collision along the Arabia–Eurasia plate boundary. In this scenario, the DF region operated throughout the Cenozoic as a major zone of residual stress accommodation and transfer in the hinterland domain of the Zagros convergence zone. Results of this study also suggest that the tectonic evolution along the Arabia–Eurasia plate boundary was modulated by the plate‐boundary dynamics and by the modes of tectonic reactivation of the intracontinental weak zones of Central Iran and at its tectonic boundaries.

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New kinematic constraints of the western Doruneh fault, northeastern Iran, from interseismic deformation analysis

Cited by 13 publications

References 18 publications

Active Fold‐Thrust Belt to Foreland Transition in Northern Adria, Italy, Tracked by Seismic Reflection Profiles and GPS Offshore Data

Active Fold‐Thrust Belt to Foreland Transition in Northern Adria, Italy, Tracked by Seismic Reflection Profiles and GPS Offshore Data

The Post‐Eocene Evolution of the Doruneh Fault Region (Central Iran): The Intraplate Response to the Reorganization of the Arabia‐Eurasia Collision Zone

The long‐term evolution of the Doruneh Fault region (Central Iran): A key to understanding the spatio‐temporal tectonic evolution in the hinterland of the Zagros convergence zone

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