RNDr. Ondrej Nemec, PhD. - Katedra mineralógie, petrológie a ložiskovej geológie

Position:	odborný asistent
Room:	G-328
Phone:	+421 2 9014 9297
e-mail:	ondrej.nemec@uniba.sk
Publications	list of publications

Section of Petrology

Scientific interests

Palaeotectonic and geodynamic evolution of the Inner Western Carpathians and Alps
Petrology, geochemistry, mineralogy and isotopic systems of metabasic a metapelitic rocks
Heavy minerals and xenoliths of Southern Slovakian alkaline-basaltic Volcanic Field
Computer Thermodynamic modeling of magmatic and metamorphic systems
Use of modern geothermobarometric methods and software modeling with tools as TERMOCALC, Perple_X and MELTS

Pedagogical activities

My teaching activities are mainly focused on radiogenic isotope systems, modern geothermobarometric methods and computer modeling in magmatic and methamorphic systems.

Bachelor degree:

Petrography of metamorphic rocks
Petrography of magmatic rocks
Microscopy of rock-forming minerals
Reflected-light microscopy (Ore microscopy)

Master’s degree

Isotopic geology and geochronology
Petrology of metamorphic rocks
Thermodynamics and Phase Equilibria
Genetic mineralogy of rocks

The most significant publications

Nemec, O.,Putiš, M., Bačík, P., Ružička, P., Németh, Z., 2020: Metamorphic Conditions of Neotethyan Meliatic Accretionary Wedge Estimated by Thermodynamic Modelling and Geothermobarometry (Inner Western Carpathians). Minerals, 10, 1-50, 1094.
Putiš M., Soták J., Li Q.-L., Ondrejka M., Li X.-H., Hu Z., Ling X., Nemec O., Németh Z., Ružička P. 2019: Origin and Age Determination of the Neotethys Meliata Basin Ophiolite Fragments in the Late Jurassic–Early Cretaceous Accretionary Wedge Mélange (Inner Western Carpathians, Slovakia). Minerals, 9, 652.
Paquette J-L., Huraiová M., Nemec O., Gannoun A., Šarinová K, Hurai V. 2019: Origin and provenance of 2 Ma–2 Ga zircons ejected by phreatomagmatic eruptions of Pliocene basalts in southern Slovakia. International Journal of Earth Sciences, 108 (8), 2607–2623.
Nemec O., Huraiová M. 2018: Provenance study of detrital garnets and rutiles from basaltic pyroclastic rocks of Southern Slovakia (Western Carpathians), Geologica Carpathica, 69 (1), 17–29.

Current Projects

APVV-19-0065 – member of the research team (2020-2023, principal investigator M. Putiš) „Petrological-geochronological record of riftogenesis and crust-mantle recycling in the Western Carpathians orogenic wedge” Click to Expand

Specific groups of rocks and their minerals are searched as indicators of the riftogenic zones, despite they often have signatures of superimposed tectono-thermal overprinting from their incorporation into the orogenic zones. Mineralogical, petrological (EPMA, micro-Raman, LA-ICP-MS, XRF, ICP-MS), isotopic-geochemical (LA-MC-ICP-MS, TIMS) and geochronological (U-Pb SIMS, LA-ICP-MS, Ar-Ar, K-Ar) methods will be applied to establish the chemical composition of minerals and rocks, their isotopic characteristics (U-Pb, Pb-Pb, Sm-Nd, Rb-Sr, Zr-Hf, Re-Os) and the ages.

VVEGA 1/0143/18 – member of the research team (2018-2021, principal investigator M. Huraiová) „Mineralogy, petrogenesis and metallogenetic potential of the Pliocene intra-plate magmatism of Western Carpathians” Click to Expand

Alkali basalts of southern Slovakia contain xenoliths of igneous rocks, which do not occur in Inner Western Carpathians. Observed rock types involve mafic gabbroic cumulates, syenites, granites, carbonatites and metasomatic products of their interaction with crust (skarns). Magmatic rocks originated during fractional crystallization of basaltic magma and partial melting of surrounding rocks. The project is targeted to deciphering mineralogical, geochemical, geochronological and petrological characteristics of magmatic rocks, evaluation of their genesis, geotectonic setting, source as well as metallogenetic potential with special emphasis on possible occurrence of critical metals, such as U, Th, Nb, Ta and rare earth elements. Additional goals refer to the interpretation and reconstruction of pre-Tertiary basement in southern Slovakia, as well as minimum age estimates of host pyroclastic maar deposits.

VEGA 1/0151/19 – member of the research team (2019-2021, principal investigator prof. M. Putiš) „Petro-chronology of the mantle and crustal dyke systems in the Cretaceous accretionary wedge of the Inner Western Carpathians and the eastern Austro-Alpine margin” Click to Expand

Cretaceous accretionary wedges of the Western Carpathians and the Austro-Alpine unit of the eastern Alps contains dykes of the crustal and mantle rocks. These rocks are significant indicator of Permian-Triassic or Jurassic-Cretaceous extension and the opening of the Neotethys and Atlantic Tethys respectively. They are of the key importance for the reconstruction of palaeotectonic and geodynamic evolution of the Carpathians and Alps. The mineral rock composition (EPMA, LA-ICP-MS) and their whole-rock chemistry (ICP-MS) will be used for definition of their palaeotectonic origin. The isotopic study (Rb/Sr, Lu/Hf, Sm/Nd. U/Pb) of the rocks and minerals, and their isotopic dating (U-Pb SIMS, nano-SIMS, LA-MC-ICP-MS, K-Ar) will enhance creation of geodynamic evolution model of mentioned accretionary complexes. Their occasional economic potential can be estimated.