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Emő Marton - One of the best experts on this subject based on the ideXlab platform.

  • neotectonic rotations in the orava nowy targ Intramontane Basin western carpathians an integrated palaeomagnetic and fractured clasts study
    Tectonophysics, 2016
    Co-Authors: Antony K Tokarski, Emő Marton, Ania świerczewska, Adam Fheed, Jurek Zasadni, Jozek Kukulak
    Abstract:

    Abstract The objectives of this contribution are: (1) to promote the application of fractured clasts analysis in conglomerates for regional stress reconstructions and (2) to advance reconstruction of the Western Carpathians structural development. Our results show that the Neogene fill of the Orava-Nowy Targ Intramontane Basin underwent CCW rotation of about 30°. We infer that the rotation terminated after 8 Ma and was related to shift along NW-SE to NNW-SSE trending faults at the NE termination of the sinistral Mur-Žilina Fault Zone. Our results show that, fractured clasts analysis can be good tool for regional tectonic reconstructions. The tool is especially useful when other tectonic tools are scarce or absent. Results of our palaeomagnetic study and fractured clasts analysis verify and supplement each others. In the studied case, palaeomagnetic results allow to distinguish between regional stress field rotation and rotation of the Orava-Nowy Targ Basin Neogene fill, whereas, results of fractured clast analysis help to constrain the age of rotation.

  • structural development of the orava nowy targ Intramontane Basin western carpathians progress report
    2016
    Co-Authors: Antony K Tokarski, Jurek Zasadni, Laszlo Fodor, Marta Waliczek, Emő Marton
    Abstract:

    The Orava-Nowy Targ Basin (ONT): (1) straddles across junction of major tectonic units of the Western Carpathians and, (2) is located at the NE termination of the Mur-Žilina Fault Zone of prominent historical seismic activity which was the NW boundary of the block shifted eastward due to lateral extrusion of the Eastern Alps. The NE segment of the fault zone was the locus of sinistral strike-slip movement during Neogene and Quaternary times. The activity of the Mur-Žilina Fault Zone has been essential for structural development of the Western Carpathians and Carpathian Foredeep during these times. It follows that the ONT is one of the key-areas for unraveling the neotectonic evolution of the Western Carpathians. The Basin is filled by poorly indurated terrestrial and fresh water sequence, up to 1300 m thick. The age of the sequence is considered to be Miocene or Miocene to Pliocene in age. We studied minor tectonic structures affecting the ONT Neogene sequence. The study comprised: (i) several sets of minor strike-slip, reverse and normal faults, single set of joints and deformation bands cutting claystone/mudstone strata, (ii) two sets (I, II) of joints cutting clasts in conglomerates and, (iii) strata orientations. The results of structural analysis were supplemented by results of new vitrinite reflectance analysis and results of our paleomagnetic studies. Our interpretation of whole data is following. (i) The deposition of the whole Neogene sequence took place in compressional stress setting with NNW-SSE oriented σ1 (present day orientation). During the deposisition the claystone/siltstone strata were cut by strike-slip and reverse faults, whereas, clasts in conglomerates were affected by joints of the set I. (ii) The maximum heating of the Neogene sequence took place after cessation of deposition. The heating resulted in bedding-parallel thermal stratification of the sequence. This thermal structure shows that upper part of the sequence, some 800 m thick, was subsequently eroded. (iii) The thermally stratified sequence was submitted to folding. During the folding, the claystone/siltstone strata were cut by joints and strike-slip faults, as well as, locally by normal faults. The folding resulted in formation of a large-scale syncline. (iv) The folded sequence underwent CCW rotation of about 20o which resulted in apparent CW stress field rotation from NNW-SSE σ1 orientation up to NNE-SSW σ1 orientation. (v) The rotation completed, the claystone/siltstone strata was still affected by jointing, strike-slip and (locally) normal faulting, whereas, clast in conglomerate were cut by joints of the set II. (vi) There followed a stage of normal-faulting largely due to NNW-SSE to NW-SE oriented extension

  • miocene rotations in the eastern alps palaeomagnetic results from Intramontane Basin sediments
    Tectonophysics, 2000
    Co-Authors: Emő Marton, Joachim Kuhlemann, Wolfgang Frisch, Istvan Dunkl
    Abstract:

    A palaeomagnetic study of late Early Miocene to late Middle Miocene sediments from the Eastern Alpine Intramontane Basins revealed counterclockwise rotations in the Ennstal, in the western part of the Noric and in the Lavanttal depressions. For the basal strata of the Basins, declinations are between 273° and 315°, while for the younger strata they are between 321° and 333°, in perfect agreement with observations from the Klagenfurt Basin. The results suggest synsedimentary rotation during the lateral tectonic extrusion of the Eastern Alps (ca. 17‐13 Ma), which was also responsible for the formation of the mostly transtensional Basins. We propose a model in which domino-shaped blocks, separated by NNW‐SSE trending dextral faults, rotated counterclockwise due to faster eastward motion in the south relative to areas further north. The protrusion of the Bohemian spur inhibited eastward motion in the northern part of the study area, thus creating a sinistral wrench corridor. After lateral extrusion had ceased the counterclockwise rotation continued probably as ‘en bloc’ rotation of ca. 30°. Clockwise rotation was observed in the eastern part of the Noric depression, which appears to belong to a limited area with complex rotation pattern near the eastern margin of the Alps. This area is wedged between the counterclockwise rotated Eastern Alps and the similarly rotated North Pannonian area in Hungary. © 2000 Elsevier Science B.V. All rights reserved.

Jozek Kukulak - One of the best experts on this subject based on the ideXlab platform.

  • neotectonic rotations in the orava nowy targ Intramontane Basin western carpathians an integrated palaeomagnetic and fractured clasts study
    Tectonophysics, 2016
    Co-Authors: Antony K Tokarski, Emő Marton, Ania świerczewska, Adam Fheed, Jurek Zasadni, Jozek Kukulak
    Abstract:

    Abstract The objectives of this contribution are: (1) to promote the application of fractured clasts analysis in conglomerates for regional stress reconstructions and (2) to advance reconstruction of the Western Carpathians structural development. Our results show that the Neogene fill of the Orava-Nowy Targ Intramontane Basin underwent CCW rotation of about 30°. We infer that the rotation terminated after 8 Ma and was related to shift along NW-SE to NNW-SSE trending faults at the NE termination of the sinistral Mur-Žilina Fault Zone. Our results show that, fractured clasts analysis can be good tool for regional tectonic reconstructions. The tool is especially useful when other tectonic tools are scarce or absent. Results of our palaeomagnetic study and fractured clasts analysis verify and supplement each others. In the studied case, palaeomagnetic results allow to distinguish between regional stress field rotation and rotation of the Orava-Nowy Targ Basin Neogene fill, whereas, results of fractured clast analysis help to constrain the age of rotation.

Ramon Julia - One of the best experts on this subject based on the ideXlab platform.

Antony K Tokarski - One of the best experts on this subject based on the ideXlab platform.

  • neotectonic rotations in the orava nowy targ Intramontane Basin western carpathians an integrated palaeomagnetic and fractured clasts study
    Tectonophysics, 2016
    Co-Authors: Antony K Tokarski, Emő Marton, Ania świerczewska, Adam Fheed, Jurek Zasadni, Jozek Kukulak
    Abstract:

    Abstract The objectives of this contribution are: (1) to promote the application of fractured clasts analysis in conglomerates for regional stress reconstructions and (2) to advance reconstruction of the Western Carpathians structural development. Our results show that the Neogene fill of the Orava-Nowy Targ Intramontane Basin underwent CCW rotation of about 30°. We infer that the rotation terminated after 8 Ma and was related to shift along NW-SE to NNW-SSE trending faults at the NE termination of the sinistral Mur-Žilina Fault Zone. Our results show that, fractured clasts analysis can be good tool for regional tectonic reconstructions. The tool is especially useful when other tectonic tools are scarce or absent. Results of our palaeomagnetic study and fractured clasts analysis verify and supplement each others. In the studied case, palaeomagnetic results allow to distinguish between regional stress field rotation and rotation of the Orava-Nowy Targ Basin Neogene fill, whereas, results of fractured clast analysis help to constrain the age of rotation.

  • structural development of the orava nowy targ Intramontane Basin western carpathians progress report
    2016
    Co-Authors: Antony K Tokarski, Jurek Zasadni, Laszlo Fodor, Marta Waliczek, Emő Marton
    Abstract:

    The Orava-Nowy Targ Basin (ONT): (1) straddles across junction of major tectonic units of the Western Carpathians and, (2) is located at the NE termination of the Mur-Žilina Fault Zone of prominent historical seismic activity which was the NW boundary of the block shifted eastward due to lateral extrusion of the Eastern Alps. The NE segment of the fault zone was the locus of sinistral strike-slip movement during Neogene and Quaternary times. The activity of the Mur-Žilina Fault Zone has been essential for structural development of the Western Carpathians and Carpathian Foredeep during these times. It follows that the ONT is one of the key-areas for unraveling the neotectonic evolution of the Western Carpathians. The Basin is filled by poorly indurated terrestrial and fresh water sequence, up to 1300 m thick. The age of the sequence is considered to be Miocene or Miocene to Pliocene in age. We studied minor tectonic structures affecting the ONT Neogene sequence. The study comprised: (i) several sets of minor strike-slip, reverse and normal faults, single set of joints and deformation bands cutting claystone/mudstone strata, (ii) two sets (I, II) of joints cutting clasts in conglomerates and, (iii) strata orientations. The results of structural analysis were supplemented by results of new vitrinite reflectance analysis and results of our paleomagnetic studies. Our interpretation of whole data is following. (i) The deposition of the whole Neogene sequence took place in compressional stress setting with NNW-SSE oriented σ1 (present day orientation). During the deposisition the claystone/siltstone strata were cut by strike-slip and reverse faults, whereas, clasts in conglomerates were affected by joints of the set I. (ii) The maximum heating of the Neogene sequence took place after cessation of deposition. The heating resulted in bedding-parallel thermal stratification of the sequence. This thermal structure shows that upper part of the sequence, some 800 m thick, was subsequently eroded. (iii) The thermally stratified sequence was submitted to folding. During the folding, the claystone/siltstone strata were cut by joints and strike-slip faults, as well as, locally by normal faults. The folding resulted in formation of a large-scale syncline. (iv) The folded sequence underwent CCW rotation of about 20o which resulted in apparent CW stress field rotation from NNW-SSE σ1 orientation up to NNE-SSW σ1 orientation. (v) The rotation completed, the claystone/siltstone strata was still affected by jointing, strike-slip and (locally) normal faulting, whereas, clast in conglomerate were cut by joints of the set II. (vi) There followed a stage of normal-faulting largely due to NNW-SSE to NW-SE oriented extension

Jesus M Soria - One of the best experts on this subject based on the ideXlab platform.

  • architecture and sedimentary facies evolution in a delta stack controlled by fault growth betic cordillera southern spain late tortonian
    Sedimentary Geology, 2006
    Co-Authors: Fernando Garciagarcia, J E Fernandez, Cesar Viseras, Jesus M Soria
    Abstract:

    Abstract Tectonic control is revealed in various ways (synsedimentary deformation structures, facies, architecture) in the coarse-grained delta systems that developed in the southeastern margin of the Guadix Basin, an Intramontane Basin in the central sector of the Betic Cordillera, Spain, during the late Tortonian (Miocene). Vertical trends in the architecture of the deltaic succession (230 m thick) show changes in the stratal stacking pattern related to the variation in time in subsidence rates (in accommodation space). A period of high subsidence controlled by a normal growth fault began at the base of the succession, producing retrogradational units representing Gilbert-type delta systems onlapped by shallow platform calcarenites. A period of low subsidence followed, controlled by growth of a listric fault producing aggradational units representing shoal-water deltas capped by red algal biostromes. A non-subsidence period and decrease in accommodation space at the top of the succession (sediment supply remained constant) produced progradational deltas. The manuscript focuses on the part of the succession where the delta deposits show the effects of extensional tectonics, a listric growth fault and its rollover, on delta development. The progressive increase in accommodation space inherent in fault growth controlled the style of delta sedimentation in the river mouth. Gilbert-type deltas developed during periods of increase in subsidence rates and shoal-water deltas during periods of decrease in subsidence rates. Horizontal trends in the architecture of the delta lobes show changes in the stratal stacking pattern affected by differential subsidence and pre-existing Basin-floor topography. Periods of increase in subsidence rates near the fault scarp correlate with accommodation space kept constant, thinning of the units and shoal-water deltas development over the rollover, away from the fault scarp.

  • late miocene stratigraphy and palaeogeographic evolution of the Intramontane guadix Basin central betic cordillera spain implications for an atlantic mediterranean connection
    Palaeogeography Palaeoclimatology Palaeoecology, 1999
    Co-Authors: Jesus M Soria, J E Fernandez, Cesar Viseras
    Abstract:

    Abstract The Guadix Basin is an Intramontane Basin located in the central sector of the Betic Cordillera. Its Late Miocene stratigraphic record is divided into three depositional sequences limited by unconformities representing tectonic and/or eustatic events. Depositional sequence I (late Tortonian) is composed by two systems tracts. The lower marks the beginning of marine sedimentation in the Basin, and comprises three retrograding lithological complexes or depositional systems (coastal, shallow platform and pelagic Basin), and is interpreted as a transgressive systems tract. The upper systems tract consists of a shallow shelf prograding into a pelagic Basin. This systems tract exhibits a typically regressive pattern and was deposited during high sea level, and is therefore interpreted as a highstand systems tract. Depositional sequence II (late Tortonian) is composed of both continental (alluvial cones) and shallow marine (Gilbert-type delta, shallow shelf, and reef) depositional systems. The deposits of this sequence record a significant fall in sea level and are interpreted as a lowstand systems tract. Depositional sequence III (late Turolian–Ventian or late Tortonian–Messinian) was formed of solely retrograding continental depositional systems (alluvial fan, lacustrine fan delta, mud flat, and lacustrine). With this sequence begins the continental sedimentation in Guadix Basin in an endorheic context. The palaeogeographic evolution of the Guadix Basin during the Late Miocene can thus be divided into three stages. The first corresponds to depositional sequence I and is characterised by the development of shallow marine environments on the Basin margins and deep water deposits in its centre. During this stage the Basin was connected to the west with the Atlantic Ocean via the Granada and Guadalquivir Basins and toward the east with the Mediterranean Sea through the Almanzora and Campo Coy Basins. In the second stage, represented by depositional sequence II, most of the Basin was occupied by shallow marine environments. During this stage the connection with the Atlantic and Mediterranean was only open through the Guadalquivir and Campo Coy Basins, respectively. Finally, the third and last stage, corresponding to depositional sequence III, is characterised by the development of continental environments throughout the Basin. This stage records the definitive closing of the connections with the Atlantic Ocean and the Mediterranean Sea.

  • late miocene pleistocene tectono sedimentary evolution and subsidence history of the central betic cordillera spain a case study in the guadix Intramontane Basin
    Geological Magazine, 1998
    Co-Authors: Jesus M Soria, Cesar Viseras, J E Fernandez
    Abstract:

    The Guadix Basin became established as an Intramontane Basin in the central sector of the Betic Cordillera at the beginning of Late Miocene time. Its geodynamic evolution starts with a unit of Tortonian marine sediments and is completed by a unit of Late Turolian–Pleistocene continental sediments. In the two units, six depositional sequences have been differentiated whose boundaries, in most cases, coincide with tectonic events. Geohistorical diagrams show the results of quantitative analyses of subsidence in the northern sector of the Basin and permit correlation of the main events with significant changes in the history of subsidence and uplift. A period of strong subsidence occurred at the beginning of Tortonian time causing the formation of a marine Basin 800 m deep. The mid- and end-Tortonian tectonic events involved periods of uplift leading to shallowing in the Basin. After continentalization at the end of the Tortonian, the Basin was uplifted continuously from Late Turolian to Late Pleistocene times, finally accumulating sediments at a height of 1000 m.