Apparent polar wander path for Adria extended by new Jurassic paleomagnetic results from its stable core: Tectonic implications

Márton, Emő; Zampieri, Dario; Ćosović, Vlasta; Moro, Alan; Drobne, Katica

doi:10.1016/j.tecto.2017.02.004

Cited by 11 publications

(5 citation statements)

References 68 publications

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“…This applies to all continental fragments and oceanic domains in the entire Neotethyan realm. Furthermore, the movement path of for instance the Adriatic microcontinent in the above cited reconstructions deviates considerably from the apparent polar wander path calculated from the direct paleomagnetic data gathered by Márton, Zampieri, et al (2017). These discrepancies indicate that, besides of large-scale plate motions imposed by the breakup of Pangea, an exertion of additional driving forces has to be considered, too.…”

Section: Continuity and Episodicity Of Tectonic Processesmentioning

confidence: 78%

Continuity and Episodicity in the Early Alpine Tectonic Evolution of the Western Carpathians: How Large‐Scale Processes Are Expressed by the Orogenic Architecture and Rock Record Data

Plašienka

2018

Tectonics

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The early Alpine tectonic evolution of the Western Carpathian orogenic system is differentiated into four main periods: (i) Middle-Late Triassic rifting and spreading of the Meliata Ocean, but its relationships to the Tethyan realm remain uncertain; (ii) Jurassic subduction of the Meliata oceanic lithosphere and coeval rifting of the Carpathian lower plate and oceanic breakup and spreading of the Atlantic-related Piemont-Váh Ocean, as well as short-term back-arc rifting of the Adriatic upper plate; (iii) Early Cretaceous slow and continuous but intermittent growth of the asymmetric, doubly vergent orogenic wedge still driven by the Meliata slab, concurrently with expansion of the outer Pennine oceanic zones; and (iv) Late Cretaceous to Middle Eocene northward drift of the Adriatic microplate with Austroalpine domains appended at its front that eliminated the external oceanic zones with intervening continental ribbons and sequentially accreted the Carpathian Penninic units. While dynamics of the periods (i) and (iv) was governed by the large-scale plate motions, periods (ii) and (iii) are interpreted as driven by the self-generated forces exerted by the subduction pull of oceanic and lower continental lithosphere. Tectonic evolution of particularly the latter two periods is documented in detail by rich structural, sedimentary, metamorphic, and magmatic rock records. It is inferred that periods of accelerating activity of the orogenic wedge progradation, distinguished as the regional tectonic phases, resulted from interactions between buildup of tectonic stresses and their structural realization dependent on the rheological properties of crustal rocks.

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Section: Continuity and Episodicity Of Tectonic Processesmentioning

confidence: 78%

Continuity and Episodicity in the Early Alpine Tectonic Evolution of the Western Carpathians: How Large‐Scale Processes Are Expressed by the Orogenic Architecture and Rock Record Data

Plašienka

2018

Tectonics

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“…Adria is generally considered to be an independent rigid microplate, encompassing the Po Plain, the Adriatic Sea, and Apulia [1,[8][9][10][11]. After a first tectonic phase in which Adria acted as a promontory of Africa, the two plates decoupled around the late Cretaceous-Paleocene transition [11].…”

Section: Tectonic Frameworkmentioning

confidence: 99%

Late Quaternary Tectonic Activity of the Udine-Buttrio Thrust, Friulian Plain, NE Italy

et al. 2020

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The NW-SE trending Udine-Buttrio Thrust is a partly blind fault that affects the Friulian plain southeast of Udine in NE Italy. It is part of a wider fault system that accommodates the northward motion of the Adriatic plate. Although seismic reflection data and morphological evidence show that the fault was active during the Quaternary, comparably little is known about its tectonic activity. We used high-resolution digital elevation models to investigate the surface expression of the fault. Measured vertical surface offsets show significant changes along strike with uplift rates varying between 0 and 0.5 mm/yr. We then analyze a topographic scarp near the village of Manzano in more detail. Field mapping and geophysical prospections (Georadar and Electrical Resistivity Tomography) were used to image the subsurface geometry of the fault. We found vertical offsets of 1–3 m in Natisone River terraces younger than 20 ka. The geophysical data allowed the identification of deformation of the fluvial sediments, supporting the idea that the topographic scarp is a tectonic feature and that the terraces have been uplifted systematically over time. Our findings fit the long-term behaviour of the Udine-Buttrio Thrust. We estimate a post-glacial vertical uplift rate of 0.08–0.17 mm/yr recorded by the offset terraces. Our results shed light on the Late Quaternary behaviour of this thrust fault in the complicated regional tectonic setting and inform about its hitherto overlooked possible seismic hazard.

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“…3C) rotations, respectively. The examples represent paleomagnetic results obtained from the northern part of stable Adria (Adriatic microplate, Márton et al 2017). Figure 3A shows that Adria must have been at about 16°N at 155 Ma It follows that the correct interpretation of a paleo-declination is easier for younger than older rocks from the same tectonic unit.…”

Section: Fig 3 Interpretation Of Paleomagnetic Inclinations Which Constrain the Latitude Where The Rocks Acquired Magnetizationsmentioning

confidence: 99%

Last scene in the large scale rotations of the Western Carpathians as reflected in paleomagnetic constraints

Márton

2020

geol

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This paper provides an overview of the paleomagnetic results which constrain the post-Paleogene tectonic development of the Western Carpathians. A group of these results are relevant to the last stage of the Tertiary folding and thrusting of the Silesian, Dukla and Magura nappes of the Outer Western Carpathian and were obtained from Paleogene-Lower Miocene flysch sediments. Both the pre- and post-folding remanences indicate about 50° CCW vertical axis rotation with respect to the present orientation. This is about a 60° rotation relative to stable Europe. It follows that the general orientation of the Silesian and more internal nappes were NW-SE, at least until the mid-Miocene. The CCW vertical axis rotation was co-ordinated with that of the Central Carpathian Paleogene Basin. The termination of the rotation can be estimated from the paleomagnetic data available from the Pieniny andesites which intruded the Pieniny Klippen Belt and the southern part of the Magura Nappe as well as from those obtained for the Neogene intramontane basins which opened up in the Outer and in the Central Western Carpathians. The paleomagnetic vectors for the andesites form two groups. The first group suggests about 45° CCW rotation relative to north, while the second shows no rotation. At the present stage of our knowledge it seems likely that some of the andesite bodies were intruded around 18 Ma, which is the oldest isotope age for the intrusions of the Wżar Mts, while some other bodies could have been emplaced after the rotation, around 11 Ma, which is the youngest isotope age for the Brijarka quarry. Vertical axis CCW rotation was also observed on sediments older than 11.6 Ma in the Orava-Nowy Targ Intramontane Basin which saddles the Magura Nappe and the Central Carpathian Paleogene Basin. However, this rotation was related to fault zone activity and was not attributed to the general rotation of the Outer Western Carpathian nappe system. Paleomagnetic results from the Nowy Sącz Intramontane Basin, which opened over the Magura Nappe, and those for the Central Western Carpathian Turiec Intramontane Basin do not indicate vertical axis rotation. In the first case, the loosely controlled age limit of the termination of the rotation is around 12 Ma. Well constrained results from the second basin imply that the rotation was definitely over by 8 Ma. Based on the above observations, and aware of the problem of often loose age control on the formation and deformation of the deposits of the intramontane basins, it is tentatively concluded that the large scale CCW rotation of the Central Western Carpathians, together with the Magura, Dukla and Silesian nappes, must have started after 18 Ma and terminated around 11 Ma.

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Apparent polar wander path for Adria extended by new Jurassic paleomagnetic results from its stable core: Tectonic implications

Cited by 11 publications

References 68 publications

Continuity and Episodicity in the Early Alpine Tectonic Evolution of the Western Carpathians: How Large‐Scale Processes Are Expressed by the Orogenic Architecture and Rock Record Data

Continuity and Episodicity in the Early Alpine Tectonic Evolution of the Western Carpathians: How Large‐Scale Processes Are Expressed by the Orogenic Architecture and Rock Record Data

Late Quaternary Tectonic Activity of the Udine-Buttrio Thrust, Friulian Plain, NE Italy

Last scene in the large scale rotations of the Western Carpathians as reflected in paleomagnetic constraints

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