Articles | Volume 36, issue 1
https://doi.org/10.5194/ejm-36-209-2024
https://doi.org/10.5194/ejm-36-209-2024
Research article
 | 
19 Feb 2024
Research article |  | 19 Feb 2024

Inclusions in magmatic zircon from Slavonian mountains (eastern Croatia): anatase, kumdykolite and kokchetavite and implications for the magmatic evolution

Petra Schneider and Dražen Balen

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Cited articles

Audétat, A. and Lowenstern, J. B.: Melt Inclusions, in: Treatise on Geochemistry, Second Edition, edited by: Holland, H. D. and Turekian, K. K., Elsevier, Oxford, 13, 143–173, https://doi.org/10.1016/B978-0-08-095975-7.01106-2, 2014. 
Baldwin, S. L., Schönig, J., Gonzalez, J. P., Davies, H., and von Eynatten, H.: Garnet sand reveals rock recycling processes in the youngest exhumed high- and ultrahigh-pressure terrane on Earth, P. Natl. Acad. Sci. USA, 118, e2017231118, https://doi.org/10.1073/pnas.2017231118, 2021. 
Balen, D. and Petrinec, Z.: Development of columnar jointing in albite rhyolite in a rapidly cooling volcanic environment (Rupnica, Papuk Geopark, Croatia), Terra Nova, 26, 102–110, https://doi.org/10.1111/ter.12075, 2014. 
Balen, D., Schneider, P., Massonne, H.-J., Opitz, J., Luptakova, J., Putiš, M., and Petrinec, Z.: The Late Cretaceous A-type alkali-feldspar granite from Mt. Požeška Gora (N Croatia): Potential marker of fast magma ascent in the Europe–Adria suture zone, Geol. Charpath., 71, 361–381, https://doi.org/10.31577/GeolCarp.71.4.5, 2020. 
Balen, D., Schneider, P., Petrinec, Z., Radonić, G., and Pavić, G.: Cretaceous Volcanic Rock Geosites of the Papuk UNESCO Global Geopark (Croatia): Scientific Aspect of Geoheritage in Geoeducation, Geotourism and Geoconservation, Geoconserv. Res., 6, 1–17, https://doi.org/10.30486/gcr.2023.1979814.1122, 2023. 
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Short summary
The acid igneous rocks of eastern Croatia related to the Late Cretaceous closure of the Neotethys Ocean contain zircon as a main accessory mineral. Among others, zircon has inclusions of anatase, hematite and melt (nanogranitoids) with kokchetavite and kumdykolite. The first finding here of kokchetavite and kumdykolite in a magmatic nanogranitoid proves that these are not exclusively ultra-high pressure phases. The detected inclusions indicate rapid uplift and cooling of the oxidised magma.