| Naslov: | Geodynamic evolution of the Northernmost Dinarides revealed by the petrogenesis of Mid-Triassic calc-alkaline volcanic rocks |
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| Avtorji: | ID Slovenec, Damir (Avtor)
ID Kukoč, Duje (Avtor)
ID Smirčić, Duje (Avtor)
ID Šegvić, Branimir (Avtor)
ID Vukovski, Matija (Avtor)
ID Belak, Mirko (Avtor)
ID Kolar-Jurkovšek, Tea (Avtor)
ID Grgasović, Tonći (Avtor)
ID Goričan, Špela (Avtor)
ID Horvat, Marija (Avtor) |
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| Datoteke: |  PDF - Predstavitvena datoteka, prenos (8,61 MB)
MD5: C76701C7D5F9B657432D6FA820EBEB0B
 ZIP - Priloga, prenos (4,33 MB)
MD5: 49F92CE248BED5F1DF021A1FCC42DC94
ZIP - Priloga, prenos (90,87 KB)
MD5: 8BCC4A8855CB07564E2582F62B3967AE
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| Jezik: | Angleški jezik |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: |  GeoZS - Geološki zavod Slovenije
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| Povzetek: | This paper presents mineralogical, petrological, geochemical, and Sr–Nd isotopic data on volcanic rocks from the Northwestern Croatian Triassic Rift Basin, which is a locally aborted back-arc rift system of the Paleotethys. The dataset also includes their isotopic ages, along with the biostratigraphic ages of all interbedded sedimentary rocks. These volcano-sedimentary successions represent the northernmost parts of the Dinarides. The obtained 40Ar/39Ar isotopic age (243±1.8 Ma) indicates the Late Anisian age of the basaltic eruption and is somewhat consistent with the obtained Early Ladinian biostratigraphic ages of the interbedded sedimentary rocks. The initial εNd varies between −0.08 to +1.90, while the initial 87Sr/86Sr varies in a wide range from 0.704765 to 0.709248. The investigated Late Anisian to Early Ladinian calc-alkaline/shoshonitic basaltic lavas were formed through: (i) low-degree partial melting (5–14 %) of a shallow (spinel stability facies; max. depth ~33 km) magma source region in the subcontinental lithospheric mantle and (ii) fractional crystallisation in a partially open magmatic system. The magma generation also involved: (i) melts from the subducted slab, which is likely linked to the ancient, subducted oceanic crust of the Paleotethys, (ii) less abundant, previously subducted continental crustal material – sediments recycled in the mantle wedge, and (iii) a negligible contribution from depleted or an ocean-island, basalt-like mantle. These conditions suggest that the magma formed through a complex process during magma ascent through tectonically weakened crustal zones. Although the intense effusive volcanic activity during the Middle Triassic in the Northwestern Croatian Triassic Rift Basin lasted for a relatively short period (~3–4 Myr; Bithynian–Fassanian), its geodynamic evolution was complex and can be attributed to: (i) the subduction of the Paleotethyan lithosphere associated with an ensialic volcanic arc developed in an active continental margin setting, and (ii) the processes of continental rifting along the mid-Triassic margins of the Adria Plate, i.e., Greater Adria. These processes represent the beginning of rifting, which affected a greater area on the Balkan Peninsula as well. |
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| Ključne besede: | Middle Triassic, calc-alkaline volcanism, basalt suite, northernmost segment of the Dinarides, NW Croatia and E Slovenia |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Datum objave: | 30.06.2026 |
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| Leto izida: | 2026 |
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| Št. strani: | str. 307-329 |
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| Številčenje: | vol. 77, no. 4 |
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| PID: | 20.500.12556/DiRROS-31346  |
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| UDK: | 551.1/.4 |
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| ISSN pri članku: | 1335-0552 |
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| DOI: | 10.31577/GeolCarp.2026.16 |
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| COBISS.SI-ID: | 283202051 |
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| Opomba: |
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| Datum objave v DiRROS: | 29.07.2026 |
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| Število ogledov: | 48 |
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| Število prenosov: | 57 |
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| Metapodatki: |    |
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