Upper Triassic and Middle Jurassic radiolarians from the ophiolitic melange of the Dinaridic Ophiolite Belt, SW Serbia

Gawlick, Hans-Jürgen Sudar; Suzuki, Hisashi; Đerić, Nevenka; Missoni, Sigrid; Lein, Richard; Jovanović, Divna

doi:10.1127/0077-7749/2009/0253-0293

Cited by 23 publications

(32 citation statements)

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“…Schuster et al (2007) and Suzuki et al (2007) found remnants of the Neotethys Ocean in the south-eastern part of the Northern Calcareous Alps, which had been accreted in late Early to Middle Jurassic time together with Triassic radiolarites. This scenario perfectly resembles the situation known from the Mirdita zone in Albania or the Dinaridic Ophiolite Belt (Gawlick et al , 2009bSchlagintweit et al 2008) (compare Fig. 15).…”

Section: Reconstruction Of the Jurassic To Early Cretaceous Tectonic supporting

confidence: 59%

Evidence for Jurassic subduction from the Northern Calcareous Alps (Berchtesgaden; Austroalpine, Germany)

Missoni

Gawlick

2010

Int J Earth Sci (Geol Rundsch)

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The closure of the western part of the Neotethys Ocean started in late Early Jurassic. The Middle to early Late Jurassic contraction is documented in the Berchtesgaden Alps by the migration of trench-like basins formed in front of a propagating thrust belt. Due to ophiolite obduction these basins propagated from the outer shelf area (=Hallstatt realm) to the interior continent (=Hauptdolomit/Dachstein platform realm). The basins were separated by nappe fronts forming structural highs. This scenario mirrors syn-orogenic erosion and deposition in an evolving thrust belt. Active basin formation and nappe thrusting ended around the Oxfordian/Kimmeridgian boundary, followed by the onset of carbonate platforms on structural highs. Starved basins remained between the platforms. Rapid deepening around the Early/Late Tithonian boundary was induced by extension due to mountain uplift and resulted in the reconfiguration of the platforms and basins. Erosion of the uplifted nappe stack including obducted ophiolites resulted in increased sediment supply into the basins and final drowning and demise of the platforms in the Berriasian. The remaining Early Cretaceous foreland basins were filled up by sediments including siliciclastics. The described Jurassic to Early Cretaceous history of the Northern Calcareous Alps accords with the history of the Western Carpathians, the Dinarides, and the Albanides, where (1) age dating of the metamorphic soles prove late Early to Middle Jurassic inneroceanic thrusting followed by late Middle to early Late Jurassic ophiolite obduction, (2) Kimmeridgian to Tithonian shallow-water platforms formed on top of the obducted ophiolites, and (3) latest Jurassic to Early Cretaceous sediments show postorogenic character.

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Section: Reconstruction Of the Jurassic To Early Cretaceous Tectonic supporting

confidence: 59%

Evidence for Jurassic subduction from the Northern Calcareous Alps (Berchtesgaden; Austroalpine, Germany)

Missoni

Gawlick

2010

Int J Earth Sci (Geol Rundsch)

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“…Furthermore Middle Jurassic formation ages of ophiolitic mélanges in the Di- narides-Albanides (e.g. Goričan et al 1999Goričan et al , 2005Halamić et al 1999;Babić et al 2002;Chiari et al 2002;Gawlick et al 2008Gawlick et al , 2009b suggest that early Late Jurassic obduction of the ophiolites was presumably preceded by the emplacement of olistostromes that were tectonically overprinted forming the mélanges below the ophiolites. In the closer Kopaonik region, however, sediments younger than the Kopaonik Formation were not found below the ophiolitic mélange, probably because obduction-related thrusts cut across older formations in this area.…”

Section: Regional Correlation and Reconstruction Of The Original Sedimentioning

confidence: 99%

Triassic metasediments in the internal Dinarides (Kopaonik area, southern Serbia): stratigraphy, paleogeographic and tectonic significance

Schefer¹,

Egli²,

Missoni³

et al. 2010

Geologica Carpathica

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Strongly deformed and metamorphosed sediments in the Studenica Valley and Kopaonik area in southern Serbia expose the easternmost occurrences of Triassic sediments in the Dinarides. In these areas, Upper Paleozoic terrigenous sediments are overlain by Lower Triassic siliciclastics and limestones and by Anisian shallow-water carbonates. A pronounced facies change to hemipelagic and distal turbiditic, cherty metalimestones (Kopaonik Formation) testifies a Late Anisian drowning of the former shallow-water carbonate shelf. Sedimentation of the Kopaonik Formation was contemporaneous with shallow-water carbonate production on nearby carbonate platforms that were the source areas of diluted turbidity currents reaching the depositional area of this formation. The Kopaonik Formation was dated by conodont faunas as Late Anisian to Norian and possibly extends into the Early Jurassic. It is therefore considered an equivalent of the grey Hallstatt facies of the Eastern Alps, the Western Carpathians, and the Albanides-Hellenides. The coeval carbonate platforms were generally situated in more proximal areas of the Adriatic margin, whereas the distal margin was dominated by hemipelagic/pelagic and distal turbiditic sedimentation, facing the evolving Neotethys Ocean to the east. A similar arrangement of Triassic facies belts can be recognized all along the evolving Meliata-MaliacVardar branch of Neotethys, which is in line with a 'one-ocean-hypothesis' for the Dinarides: all the ophiolites presently located southwest of the Drina-Ivanjica and Kopaonik thrust sheets are derived from an area to the east, and the Drina-Ivanjica and Kopaonik units emerge in tectonic windows from below this ophiolite nappe. On the base of the Triassic facies distribution we see neither argument for an independent Dinaridic Ocean nor evidence for isolated terranes or blocks.

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“…The existence of Anisian and Upper Triassic radiolarites (e.g. Chiari et al 1996;Dimitrijević et al 2003;Goričan et al 2005;Bortolotti et al 2006;Gawlick et al 2008Gawlick et al , 2009b together with the ophiolitic suite and Middle Jurassic metamorphic soles prove the existence of a today eroded ophiolitic nappe-stack that was located close to the Eastern Alps (southern Northern Calcareous Alps). In the Dinarides/Albanides/Hellenides, where different ophiolite imbricates are separated by amphibolites and/or radiolariticophiolitic mélanges, in places the Triassic radiolarites are preserved as the sedimentary cover of basalts or gabbros (e.g.…”

Section: Erosion Of a Jurassic Ophiolitic Nappe-stack As Indicated Bymentioning

confidence: 99%

“…The characteristic microfacies of Anisian/Ladinian (see Gawlick et al 2009b) and Upper Triassic radiolarites (see Gawlick et al 2009b) allow a rough age assignment. This microfacies classification for the siliceous pebbles of the Gartenau section can also be used at other locations where siliceous pebble bearing conglomerate and breccia beds of the Rossfeld Formation occur (e.g.…”

Section: Middle Upper Triassic and Middle Jurassic Radiolarite Clasmentioning

confidence: 99%

“…Another locality near Sjenica (Zlatar Mountains, Sj in Fig. 1A) contains Lower Ladinian (Fassanian, Gawlick et al 2009b) and red-green, bedded Upper Carnian to Lower/Middle Norian (Obradović & Goričan 1988;Goričan et al 1999) radiolarite blocks within the Upper Bathonian to Lower/Middle Callovian or Callovian to Oxfordian mélange (Gawlick et al 2009b). Remnants of Late Triassic to Jurassic ocean floor are also documented in the Vardar segment of the Neotethys ( = Vardar) Ocean to the east (Obradović & Goričan 1988;Pamić et al 2002;Karamata 2006).…”

Section: Middle Upper Triassic and Middle Jurassic Radiolarite Clasmentioning

confidence: 99%

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Erosion of a Jurassic ophiolitic nappe-stack as indicated by exotic components in the Lower Cretaceous Rossfeld Formation of the Northern Calcareous Alps (Austria)

Krische¹,

Goričan²,

Gawlick³

2014

Geologica Carpathica

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Abstract:The microfacies and biostratigraphy of components in mass-flow deposits from the Lower Cretaceous Rossfeld Formation of the Northern Calcareous Alps in Austria were analysed. The pebbles are classified into six groups: 1) Triassic carbonates (uppermost Werfen to basal Gutenstein Formations), 2) Upper Jurassic to lowermost Cretaceous carbonates (Oberalm Formation and Barmstein Limestone), 3) contemporaneous carbonate bioclasts (?Valanginian to ?Hauterivian), 4) siliceous pebbles (radiolarites, ophicalcites, siliceous deep-sea clays, cherts), 5) volcanic and ophiolitic rock fragments and 6) siliciclastics such as quartz-sandstones and siltstones. The radiolarites show three age groups: Ladinian to Early Carnian, Late Carnian/Norian and Late Bajocian to Callovian. The Middle Triassic radiolarites are interpreted as derived from the Meliata facies zone or from the Neotethys ocean floor, whereas the Late Triassic radiolarites give evidence of the sedimentary cover of the Neotethys ocean floor. During late Early to early Late Jurassic, the Triassic to Early/Middle Jurassic passive margin of the Neotethys attained a lower plate position and became obducted by the accreted ocean floor of the Neotethys Ocean. The accreted ocean floor was contemporaneously eroded and resedimented in different deep-water basins in front of the nappe-stack. These basin fills were subsequently incorporated in the orogen forming mélanges in this complex ophiolitic nappe-stack. The Middle Jurassic radiolarites are interpreted as the matrix of these mélanges. Together with the volcanic and ophiolitic material the siliceous rocks were eroded from this ophiolitic nappe-stack in Early Cretaceous times and brought by a fluvial system to the Rossfeld Basin within the Tirolic realm of the Northern Calcareous Alps. The different fining-upward sequences in the succession of the Lower Cretaceous Rossfeld Formation can be best explained by sea-level fluctuations and decreasing tectonic activity in the Jurassic orogen.

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Upper Triassic and Middle Jurassic radiolarians from the ophiolitic melange of the Dinaridic Ophiolite Belt, SW Serbia

Cited by 23 publications

References 0 publications

Evidence for Jurassic subduction from the Northern Calcareous Alps (Berchtesgaden; Austroalpine, Germany)

Evidence for Jurassic subduction from the Northern Calcareous Alps (Berchtesgaden; Austroalpine, Germany)

Triassic metasediments in the internal Dinarides (Kopaonik area, southern Serbia): stratigraphy, paleogeographic and tectonic significance

Erosion of a Jurassic ophiolitic nappe-stack as indicated by exotic components in the Lower Cretaceous Rossfeld Formation of the Northern Calcareous Alps (Austria)

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