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- Title
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)
- Authors
Vukovski, Matija; Kukoč, Duje; Grgasović, Tonći; Fuček, Ladislav; Slovenec, Damir
- Abstract
Upper Triassic to Lower Cretaceous stratigraphic successions deposited on the passive continental margin of Adria microplate facing the Neotethys Ocean were investigated on Ivanščica Mt. (NW Croatia). This area represents a transitional area between the Alps and the Dinarides. After a short Middle Triassic pelagic episode related to the rifting of the Neotethys, progradation of the carbonate platform over newly formed grabens resulted in formation of stable shallow-water depositional environment during the Late Triassic. Tectonically induced subsidence pulse at the Triassic/Jurassic boundary affected SE part of the investigated area resulting in the deposition of pelagic limestones, shale, marls, and calcarenites above Upper Triassic platform carbonates. At the same time, NW part of the investigated area was still characterized by shallow-water sedimentation until the Pliensbachian. This second subsidence phase was manifested by formation of neptunian dykes within Lower Jurassic platform limestones and deposition of the Middle Jurassic pelagic limestones. These two Early Jurassic subsidence events are likely related to the rifting of the Alpine Tethys. Radiolarian cherts were deposited in both areas in the late Middle and Late Jurassic. Radiolarians from the SW Ivanščica Mt. indicate late Bathonian to Early Tithonian age of the radiolarian cherts. Uppermost Jurassic to Lower Cretaceous Aptychus limestone is found across the entire investigated area. These limestones were deposited from the Late Tithonian to the Valanginian when synorogenic mixed carbonate–siliciclastic turbidites started to fill the basin indicating a prominent compressional tectonic phase widely recorded in the Alps and the Dinarides.
- Publication
Facies, 2023, Vol 69, Issue 4, p1
- ISSN
0172-9179
- Publication type
Article
- DOI
10.1007/s10347-023-00674-7