Evolution of eastern passive margin of Adria recorded in shallow- to deep-water successions of the transition zone between the Alps and the Dinarides (Ivanščica Mt., NW Croatia)

Vukovski, Matija; Kukoč, Duje; Grgasović, Tonći; Fuček, Ladislav; Slovenec, Damir

doi:10.1007/s10347-023-00674-7

Cited by 3 publications

(8 citation statements)

References 85 publications

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“…Middle to Late Jurassic radiolarian cherts are recorded in both areas, however, their contact with underling deposits and complete thickness is not known. In both areas, radiolarian cherts conformably pass up-section into Tithonian to Valanginian pelagic Aptychus limestone with several beds of calcarenites sporadically occurring at the contact as recorded in the southern part of central Ivanščica (Babić & Zupanič, 1973;Vukovski et al, 2023). The youngest Mesozoic deposits are mixed carbonate-siliciclastic turbidites of the Hauterivian to Albian Oštrc Formation (Zupanič et al, 1981;Lužar-Oberiter et al, 2009, which overly the Aptychus limestone.…”

Section: Lithostratigraphic Characteristicsmentioning

confidence: 83%

“…are exclusively shallow-marine and consist of several hundred meters thick series of dolomites and limestones (Šimunić et al, 1982; Šimunić & Šimunić, 1997). These are the equivalent of the Main Dolomite and Dachstein Limestone found in the Alps (Vukovski et al, 2023).…”

Section: Lithostratigraphic Characteristicsmentioning

confidence: 99%

“…In the northern part, shallow-marine Lower Jurassic limestone conformably overlie Upper Triassic carbonates and are in turn overlain by Middle Jurassic pelagic limestone (Vukovski et al, 2023). In the southern part, Upper Triassic deposits are overlain by Lower Jurassic thick pelagic series consisting of pelagic limestone, carbonate breccia, marl and calcarenites (Babić, 1974;Vukovski et al, 2023). Middle to Late Jurassic radiolarian cherts are recorded in both areas, however, their contact with underling deposits and complete thickness is not known.…”

Section: Lithostratigraphic Characteristicsmentioning

confidence: 99%

“…Successions composed of these deposits differ in the southern and northern parts of central Ivanščica. In the northern part, shallow-marine Lower Jurassic limestone conformably overlie Upper Triassic carbonates and are in turn overlain by Middle Jurassic pelagic limestone (Vukovski et al, 2023). In the southern part, Upper Triassic deposits are overlain by Lower Jurassic thick pelagic series consisting of pelagic limestone, carbonate breccia, marl and calcarenites (Babić, 1974;Vukovski et al, 2023).…”

Section: Lithostratigraphic Characteristicsmentioning

confidence: 99%

“…were relatively scarce (Babić et al, 2002;Goričan et al 2005;Lužar-Oberiter et al, 2009, until a series of recently published studies released by the GOST project (https://projectgost.wordpress.com). These studies provide new data set on stratigraphy (Slovenec et al 2020; Kukoč et al, 2023Kukoč et al, , 2024, petrology Slovenec et al, 2023;Šegvić et al, 2022) and lithostratigraphy of the Adriatic passive margin successions (Vukovski et al, 2023) tectonically assembled into the structural architecture of this mountain. As a supplement to published studies of the GOST project, this paper aims to present new and more detailed data on spatial arrangement, kinematics and age of deformational structures in Mesozoic and Cenozoic rocks of Ivanščica Mt.…”

Section: Introductionmentioning

confidence: 97%

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Unravelling the Tectonic Evolution of the Dinarides – Alps – Pannonian Basin Transition Zone: Insights from Structural Analysis and Low-Temperature Thermochronology from Ivanščica Mt., NW Croatia

Vukovski,

Špelić,

Kukoč

et al. 2024

Preprint

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A comprehensive study, including geological mapping, structural and thermochronological analysis, has been carried out on Ivanščica Mountain (NW Croatia), with the aim to contribute in reconstruction of the tectonic history of the Dinarides, Southern/Eastern Alps and Pannonian Basin transitional zone. Implementation of structural and thermochronological methods enabled a subdivision of Ivanščica Mt. into three structural domains (from bottom to top): Ivanščica Parautochton, Ivanščica Imbricates and Oligo-Neogene sedimentary cover. In addition, a sequence of deformational events in tectonic history of this transitional zone is proposed, comprising three extensional and four contractional events starting from Middle Triassic until present times. Oldest deformational events indicating Middle Triassic (D1) and Early Jurassic (D2) extensional phases were recognised only in volcano-sedimentary record. The oldest contractional event (D3) is related to obduction of the Neotethyan ophiolitic mélange over Upper Triassic to Lower Cretaceous succession of the eastern margin of the Adriatic microplate, which resulted in thermal alteration of the Ivanščica Imbricates structural domain in Berriasian - Valanginian times (~ 140 Ma). This event was soon followed by another contractional event (D4), which resulted in thrusting and imbrication of the Adriatic passive margin successions together with tectonically emplaced ophiolitic mélange, thermal alteration of the footwall successions, fast exhumation and erosion. Apatite fission track data together with syn-tectonic deposits indicate Hauterivian to Albian age of this event (~ 133–100 Ma). These Mesozoic structures were rotated in post-Oligocene times and brought from initially typically Dinaridic SE striking and SW verging structures to recent SW striking and NW verging structures. Following extensional event (D5) manifested in the formation of SE striking and mostly NE dipping normal listric faults, and ENE striking dextral faults accommodating top-NE extension in the Pannonian Basin. Deformations were coupled with hanging wall sedimentation of Ottnangian to middle Badenian (~ 18–14 Ma) syn-rift deposit as observed from the reflection seismic and well data. Short lasting contraction (D6) was registered in the late Sarmatian (~ 12 Ma). The youngest documented deformational event (D7) resulted in reactivation of ENE striking dextral faults, formation of SE striking dextral faults as well as the formation of E to NE trending folds and reverse faults. This event corresponds to Late Pannonian (~ 6 Ma) to recent NNW-SSE contraction driven by the indentation and counterclockwise rotation of Adriatic microplate. Recognized tectonic events and their timings indicate that Ivanščica was mainly affected by deformational phases related to the Mesozoic evolution of the Neotethys Ocean as well as Cenozoic opening and inversion of the Pannonian Basin. Mesozoic tectono-sedimentary evolution of Ivanščica Mountain exhibits clear Dinaridic affiliation, more precisely, that of the Pre-Karst zone of the Dinarides.

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Section: Lithostratigraphic Characteristicsmentioning

confidence: 83%

Section: Lithostratigraphic Characteristicsmentioning

confidence: 99%

Section: Lithostratigraphic Characteristicsmentioning

confidence: 99%

Section: Lithostratigraphic Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Unravelling the Tectonic Evolution of the Dinarides – Alps – Pannonian Basin Transition Zone: Insights from Structural Analysis and Low-Temperature Thermochronology from Ivanščica Mt., NW Croatia

Vukovski,

Špelić,

Kukoč

et al. 2024

Preprint

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The early history of the Neotethys archived in the ophiolitic mélange of northwestern Croatia

Kukoč,

Slovenec,

Šegvić

et al. 2023

JGS

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Ophiolite exposures in NW Croatia have been attributed to the Western Vardar Ophiolitic Unit and interpreted as derived from the Meliata-Maliac-Vardar branch of the Neotethys. Blocks within the ophiolitic mélange on Mt. Ivanščica were investigated for petrological and geochemical characteristics of effusive rocks and radiolarian dating of associated pelagic sedimentary rocks. Analysed effusive basic rocks represent chemographically uniform sub-alkaline high-Ti massive tholeiitic basalts characterized by an enriched composition typical of E-MORB. These basalts are compatible with approximately 9 to 11% of partial melting of an enriched mantle source transitional between primitive and depleted MORB-type mantle and are formed in the non-subduction geotectonic setting of E-MORB-type. This reflects an initial succession of oceanic protocrust formation and the onset of ocean spreading. Radiolarians from chert and shale succession associated with basalts indicate a Late Anisian to Early Ladinian age of the initial ocean floor spreading, which continued into the Langobardian. Obtained data are correlative with reported blocks interpreted as remnants of the Triassic Neotethys crust from the ophiolitic mélange of the Western Vardar Ophiolitic Unit and further reaffirm common origin from a single ocean basin located east of the Adria microplate. Thematic collection: This article is part of the Ophiolites, melanges and blueschists collection available at: https://www.lyellcollection.org/topic/collections/ophiolites-melanges-and-blueschists

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Facies architecture, geochemistry and petrogenesis of Middle Triassic volcaniclastic deposits of Mt. Ivanščica (NW Croatia): evidence of bimodal volcanism in the Alpine-Dinaridic transitional zone

Smirčić,

Vukovski,

Slovenec

et al. 2024

Swiss J Geosci

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During the Middle Triassic, intensive volcanic activity took place along the eastern margin of Pangea, including the Greater Adria promontory, due to the Neotethyan oceanization. This resulted in the formation of various volcanic and volcaniclastic rock types. The region of NW Croatia, acting as a transition zone between the Southern Alps and the Dinarides, showcases the outcrops of these rocks. The present study investigates the facies of volcaniclastic rocks, the distribution of those facies, formation processes, as well as the genesis of the primary magma to gain a better understanding of the complex geodynamics of this region during the Middle Triassic. Six profiles across the Vudelja quarry front were surveyed using drone imaging and samples were collected for detailed petrographic and geochemical analyses. Two groups of volcaniclastic rocks were identified—mafic and intermediate/felsic. The former is represented by (I) autoclastic effusive facies and (II) resedimented autoclastic facies, while the latter is represented by (III) secondary pyroclastic facies. Mafic volcaniclastics were generated through basaltic effusions in marine environments, fragmentation in contact with seawater, mixing with shallow marine carbonate clasts, and subsequent redeposition in deeper marine areas. The secondary pyroclastic facies (III) consists of a regionally distributed felsic Pietra Verde tuff whose deposits may be related to pyroclastic density currents and syn-eruptive resedimentation by turbidite-like currents. Geochemical data indicate that parental magmas responsible for generating the mafic volcaniclastics had a calc-alkaline composition and originated in ensialic and mature arc settings of an active continental margin. The observed chemical composition is likely inherited from older, arc-related lithologies, associated with the subduction of the Paleotethys Ocean. Parental magmas are thought to have formed during continental rifting of the passive Middle Triassic margins of the Greater Adria through (i) partial melting of the heterogeneous lithospheric mantle, which had been metasomatized during an earlier Hercynian subduction, and (ii) subordinate processes related to the melting of the upper continental crust and subsequent fractionation. Ar/Ar dating on plagioclase separates yielded an age of 244.5 ± 2.8 Ma for mafic volcaniclastics. This aligns well with biostratigraphic ages of felsic tuffs which crop out on a broader regional scale of the Dinarides, the Southern Alps, and the Transdanubian Range. The overlapping ages obtained from radiometric dating of mafic volcaniclastics and biostratigraphic ages of the felsic Pietra Verde tuffs strongly suggest that the Greater Adria region experienced concurrent bimodal volcanism during the Middle Triassic.

show abstract

Evolution of eastern passive margin of Adria recorded in shallow- to deep-water successions of the transition zone between the Alps and the Dinarides (Ivanščica Mt., NW Croatia)

Cited by 3 publications

References 85 publications

Unravelling the Tectonic Evolution of the Dinarides – Alps – Pannonian Basin Transition Zone: Insights from Structural Analysis and Low-Temperature Thermochronology from Ivanščica Mt., NW Croatia

Unravelling the Tectonic Evolution of the Dinarides – Alps – Pannonian Basin Transition Zone: Insights from Structural Analysis and Low-Temperature Thermochronology from Ivanščica Mt., NW Croatia

The early history of the Neotethys archived in the ophiolitic mélange of northwestern Croatia

Facies architecture, geochemistry and petrogenesis of Middle Triassic volcaniclastic deposits of Mt. Ivanščica (NW Croatia): evidence of bimodal volcanism in the Alpine-Dinaridic transitional zone

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