Naslov
EARLY AND MIDDLE MIOCENE VOLCANICLASTIC RECORD ON MTS. KALNIK AND POŽEŠKA GORA

Autori
Trinajstić, Nina ; Brlek, Mihovil ; Gaynor, Sean ; Schindlbeck - Belo, Julie ; Šuica, Sanja ; Brčić, Vlatko ; Mišur, Ivan ; Kukoč, Duje ; Baranyi, Viktória

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts - PhD Student Symposium 2021 / Barišić, Dajana - Zagreb : Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2021, 304-305

ISBN
978-953-6076-90-1

Skup
5. Simpozij studenata doktorskih studija PMF-a = 5th Faculty of Science PhD Student Symposium

Mjesto i datum
Zagreb, Hrvatska, 24.04.2021. - 25.04.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
geochronology, tephrostratigraphy, miocene, North Croatian Basin

Sažetak
The formation and evolution of the Pannonian Basin as part of the Carpathian-Pannonian Region (CPR) was accompanied by voluminous silicic eruptions during Early and Middle Miocene [1]. Silicic pyroclastic material, which covered much of the CPR, can be found in Miocene deposits in the North Croatian Basin (NCB, SW part of Pannonian Basin). This research is focused on two main outcrops of volcaniclastic rocks on Mts. Kalnik and Požeška Gora. Samples are in a procces of analyses using a ”multi-proxy“ approach, combining sedimentological, petrological and paleontological data, high-precision zircon geo(petro)chronology, 40Ar/39Ar radiometric dating along with geochemistry and isotopic composition of volcanic glass and minerals. First results from Mt. Kalnik volcaniclastic deposits characterized them as massive rhyolitic ignimbrites with a CA-ID-TIMS U-Pb zircon age of 18.06 ± 0.023 Ma [2]. These results indicate that potentially correlative volcaniclastic deposits are intercalated with marine sediments in the Hrvatsko Zagorje Basin and lake sediments in the Sinj Basin. Guided by results from Avanić [3] and de Leeuw [4], we sampled nine additional volcaniclastic outcrops. Furthermore, deposites that might be correlative with Mt. Požeška gora primary volcanoclastic turbidites are found on Mt. Medvednica intercalated in marine sediments of Central Paratethys. New CA-ID-TIMS zircon ages indicates that the initial Middle Miocene marine flooding of the western part of the NCB (Mt. Medvednica) could have occurred contemporaneously with its eastern part (Mt. Požeška Gora, 15.345 ± 0.02 Ma, [2]). Integrated data will enable more reliable tephrochronological and volcanic provenance, as well as petrogenetic reconstructions of Mts. Kalnik and Požeška Gora volcaniclastic deposits. This work is supported by the Croatian Science Foundation through project „Miocene syn-rift evolution of the North Croatian Basin (Carpathian-Pannonian Region): a multi-proxy approach, correlation and integration of sedimentary and volcanic record“ (PYROSKA), (UIP-2019-04-7761).

Izvorni jezik
Engleski

Znanstvena područja
Geologija

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