Implication of Mineralogy and Isotope Data on the Origin of the Permian Basic Volcanic Rocks of the Hronicum (Slovakia, Western Carpathians)
| Autor: | Jozef Vozár, Viera Šimonová, Anna Vozárová, Štefan Ferenc, Juraj Butek, Ján Spišiak |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Permian
Geochemistry Western Carpathians engineering.material 010502 geochemistry & geophysics 01 natural sciences Mantle (geology) Apatite Sm/Nd and Pb isotopes TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY 010503 geology Chemical composition Amphibole geochemistry 0105 earth and related environmental sciences Basalt geography geography.geographical_feature_category Geology Hronic Unit Mineralogy Geotechnical Engineering and Engineering Geology Permian volcanic rocks Volcanic rock Augite visual_art engineering visual_art.visual_art_medium QE351-399.2 |
| Zdroj: | Minerals, Vol 11, Iss 841, p 841 (2021) Minerals Volume 11 Issue 8 |
| ISSN: | 2075-163X |
| DOI: | 10.3390/min11080841 |
| Popis: | The paper presents new geochemical data of the basic to intermediate volcanic rocks from the Hronic unit. The studied rocks are strongly altered and the primary mineral composition (clinopyroxenes, amphiboles, spinels, biotites, and plagioclases) is preserved only in some localities. The clinopyroxene corresponds to augite and primary amphiboles to pargasites. Spinels have a chemical composition similar to spinels from volcanic rocks. According to chemical composition, the studied basalts correspond to rift-related continental tholeiites. 143Nd/144Nd vs. 87Sr/86Sr isotopic ratios of the basalts are scattered around the value of 143Nd/144Nd for CHUR, where 143Nd/144Nd ratios are relatively stable and 87Sr/86Sr values are relatively varied. According to isotopic ratio of 207Pb/204Pb vs. 206Pb/204Pb, the basalt analyses lie in the field of EMII (mantle source enriched with crustal materials). The new results of U-Pb LA-ICP-MS dating of apatite point to an age 254 ± 23 Ma (Lopingian). |
| Databáze: | OpenAIRE |
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