Cretaceous hydrothermal remobilization in the Central Western Carpathians: Dating of monazite-(Ce), xenotime-(Y), and hematite
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10505708" target="_blank" >RIV/00216208:11310/25:10505708 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WIUWkMPS.k" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WIUWkMPS.k</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.31577/GeolCarp.2025.08" target="_blank" >10.31577/GeolCarp.2025.08</a>
Alternative languages
Result language
angličtina
Original language name
Cretaceous hydrothermal remobilization in the Central Western Carpathians: Dating of monazite-(Ce), xenotime-(Y), and hematite
Original language description
In this work, we investigated two regionally distributed and economically unimportant mineralizations. The first - quartz-hematite mineralization is found as veinlets and fracture filling, both in Variscan basement rocks and in Lower Triassic sandstones in the Tatric Unit. Using (U-Th)/He analysis, one hematite sample from Magurka-Kapustisko was dated to 97.5 +- 4.4 Ma; another sample gave a lower precision age of 71+- 40 Ma. Previous geological and fluid-inclusion evidence suggests that the formation of the hematite veinlets could be linked to fluids expelled from the soles of moving thick- or thin-skinned nappes. The second studied mineralization consists of quartz with chlorite, tourmaline and REE phosphates monazite-(Ce) or xenotime-(Y), embedded in older mineralizations (siderite-ankerite veins - Čierny Balog, Jedľové Kostoľany, or metamorphosed hematite-magnetite ores - Bacúch). Our sample set was augmented by one metamorphic rock with REE phosphates (site Muráň; all samples from Veporic Unit). The U-Pb (LA-ICP-MS) ages from Jedľové Kostoľany, Čierny Balog and Muráň fall into a narrow range of 81-86 Ma, with one outlier at 77 Ma. The ages from Bacúch are somewhat older, between 87 and 92 Ma. The older ages from the nothernmost part of the Veporic unit reflect the progressive exhumation of this unit from north to south. At Jedľové Kostoľany, the ages of REE phosphates are only slightly older than those previously determined on hydrothermal muscovite, thus documenting lasting hydrothermal activity at these times. Large xenotime-(Y) crystals from Čučma (Gemeric Unit), associated with apatite, gave a spread of ages, with the main peak centered at 143 +- 2 Ma. This age likely corresponds to Early Cretaceous compression, folding, and thrusting in the Gemeric Unit. An older event, located in our data at 183 +- 3 Ma, corresponds to pre-existing, partially remobilized mineralization, recorded also in previously published ages related to uraninite. Remobilization was probably caused by unroofing of the Variscan basement of the Gemeric Unit and growth of the Meliata ocean basin.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geologica Carpathica
ISSN
1335-0552
e-ISSN
1336-8052
Volume of the periodical
76
Issue of the periodical within the volume
3
Country of publishing house
SK - SLOVAKIA
Number of pages
16
Pages from-to
155-170
UT code for WoS article
001597846300002
EID of the result in the Scopus database
2-s2.0-105035325507