Crustal exhumation and depocenter migration from the Alpine orogenic margin towards the Pannonian extensional back-arc basin controlled by inheritance

Fodor, László; Balázs, Attila; Csillag, Gábor; Dunkl, İstván; Héja, Gábor; Jelen, Bogomir; Kelemen, Péter; Kövér, Szilvia; Németh, András; Nyíri, Dániel; Selmeczi, Ildikó; Trajanova, Mirka; Vrabec, Marko

doi:10.1016/j.gloplacha.2021.103475

Cited by 39 publications

(33 citation statements)

References 164 publications

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“…Furthermore, underneath this orogenic segment, an inclined weak zone of wet olivine rheology is defined in the lithospheric mantle, representing an inherited suture zone (Figure 3). Simulating a thick crust and a hot and heterogenous lithosphere agrees with geological constraints on back‐arc lithospheric extension and has been also inferred and applied in previous studies (e.g., Balazs, Maƫenco, et al., 2021; Fodor et al., 2021; Horvath et al., 2015; Sokoutis et al., 2007). The role of different upper plate weak zones and their distance from the trench is assessed in parameter tests.…”

Section: Methodssupporting

confidence: 84%

“…The AlCaPa megaunit in the north derived from the Alpine orogenic wedge, while Tisza‐Dacia in the South detached from the Dinaridic margin (Figure 2b; Csontos & Vörös, 2004; van Hinsbergen et al., 2020; Horváth et al., 2015; Matenco & Radivojević, 2012). This pre‐rift orogenic evolution resulted in similar crustal or mantle inherited weak zones as the implemented ones in our and similar numerical models (Balázs, Maƫenco, et al., 2021; Fodor et al., 2021).…”

Section: Discussionsupporting

confidence: 76%

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The Dynamics of Forearc – Back‐Arc Basin Subsidence: Numerical Models and Observations From Mediterranean Subduction Zones

et al. 2022

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The subsidence history of forearc and back‐arc basins reflects the relationship between subduction kinematics, mantle dynamics, magmatism, crustal tectonics, and surface processes. The distinct contributions of these processes to the topography variations of active margins during subduction initiation, oceanic subduction, and collision are less understood. We ran 2D elasto‐visco‐plastic numerical models including surface and hydration processes. The models show the evolution of wedge‐top and retro‐forearc basins on the continental overriding plate, separated by a forearc high. They are affected by repeated compression and extension phases. Compression‐induced subsidence is recorded in the syncline structure of the retro‐forearc basin from the onset of subduction. The 2–4 km upper plate negative residual topography is produced by the gradually steepening slab, which drags down the upper plate. Trench retreat leads to slab unbending and decreasing slab dip angle that leads to upper plate trench‐ward tilting. Back‐arc basins are either formed along inherited weak zones at a large distance from the arc or are created above the hydrated mantle wedge originating from arc rifting. Back‐arc subsidence is primarily governed by crustal thinning that is controlled by slab roll‐back and supported by the underlying mantle convection. High subduction and mantle convection velocities result in large wavelength negative dynamic topography. Collision and continental subduction are linked to the uplift of the forearc basins; however, the back‐arc records ongoing extension during a soft collision. During the hard collision, both the forearc and back‐arc basins are ultimately affected by the compression. Our modeling results provide insights into the evolution of Mediterranean subduction zones.

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Section: Methodssupporting

confidence: 84%

Section: Discussionsupporting

confidence: 76%

The Dynamics of Forearc – Back‐Arc Basin Subsidence: Numerical Models and Observations From Mediterranean Subduction Zones

et al. 2022

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“…The role of negative inversion in the development of the Pannonian Basin is demonstrated by a recent paper of Tari et al (2021). According to Fodor et al (2021) the direction of post-orogenic (mostly Miocene) extension was NE-SW in this area, which is roughly parallel with the direction of the northern and middle sections. Therefore we carried out section restorations in order to remove the effect of this post-orogenic negative inversion on the afformentioned sections (Figures 9c and 9f).…”

Section: Cretaceous Contractional Structures Of the Zala Basinmentioning

confidence: 89%

“…In this WSW-ENE striking zone (Figure 2a) intense post-Eocene transpressional deformation occurred (Csontos & Nagymarosy, 1998;Fodor et al, 2013). The Zala Basin can be considered as one of the sub-basins of the Pannonian back-arc basin system (Fodor et al, 2013(Fodor et al, , 2021. The formation of the Zala Basin was controlled by the Baján low angle normal fault (Figures 2a and 2b).…”

Section: Geology Of the Study Areamentioning

confidence: 99%

“… (a) Subcrop map of the folded Mesozoic at the level of the base‐Upper Cretaceous in the western TR and Zala Basin (after Fodor et al., 2013 , modified); for location of the map see Figure 1a; (b) Location of the 3D seismic data set and the Keszthely Hills on a regional cross‐section (after Fodor et al., 2021, modified); for location of the section see panel (a) Location of the 3D seismic block is indicated by red rectangle; the Keszthely Hills is indicated by a black rectangle. …”

Section: Introductionmentioning

confidence: 99%

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Modes of Oblique Inversion: A Case Study From the Cretaceous Fold and Thrust Belt of the Western Transdanubian Range (TR), West Hungary

et al. 2022

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Inversion of pre‐existing normal faults is a frequent phenomenon in orogenic belts. However, their impact on the evolution of the Cretaceous Eoalpine orogeny is poorly studied, despite the widespread presence of Triassic and Jurassic normal faults. Our study area is the SW part of the Transdanubian Range (TR), which represents the uppermost thick‐skinned nappe of the Eoalpine orogeny in the Alpine realm. The variable trend of Cretaceous contractional structures within the Transdanubian Range has been traditionally explained by poly‐phase shortening. However, based on the combined analyses of field observations and 3D seismic data, we found that the complex geometry of Cretaceous contractional structures can be explained rather by the oblique inversion of segmented Late Triassic grabens. In general, the SW part of the TR can be characterized by N‐S trending contractional structures. NW‐SE striking oblique ramps are nucleated above Late Triassic normal faults, whereas NE‐SW trending folds and thrust with limited strike‐parallel length evolved due to the inversion of pre‐existing breached relay ramps, which connected the segments of Late Triassic normal faults. We determined different types of oblique ramps, incuding normal faults, which suffered transpressional reactivation, oblique hanging wall breakthrough thrusts, oblique footwall short‐cut and hanging wall by‐pass thrusts. Only very steep normal faults, or those that strike at low angle to the regional E‐W shortening direction, were not reactivated.

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The dynamics of forearc - back-arc vertical motion: numerical models and observations from the Mediterranean

Balázs

Faccena

Gerya

et al. 2021

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Crustal exhumation and depocenter migration from the Alpine orogenic margin towards the Pannonian extensional back-arc basin controlled by inheritance

Cited by 39 publications

References 164 publications

The Dynamics of Forearc – Back‐Arc Basin Subsidence: Numerical Models and Observations From Mediterranean Subduction Zones

The Dynamics of Forearc – Back‐Arc Basin Subsidence: Numerical Models and Observations From Mediterranean Subduction Zones

Modes of Oblique Inversion: A Case Study From the Cretaceous Fold and Thrust Belt of the Western Transdanubian Range (TR), West Hungary

The dynamics of forearc - back-arc vertical motion: numerical models and observations from the Mediterranean

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