Metallogenesis of vein-type U-deposits in the Bohemian Massif, constrained by U–Pb uraninite-apatite dating and AFT thermochronology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169531" target="_blank" >RIV/00025798:_____/25:10169531 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/25:00142012

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Metallogenesis of vein-type U-deposits in the Bohemian Massif, constrained by U–Pb uraninite-apatite dating and AFT thermochronology

Popis výsledku v původním jazyce

Although the Bohemian Massif hosts significant vein-type U-deposits associated with shear zones, their metallogenetic model in the frame of the Central European Variscides is poorly constrained due to the lack of geochronological data. This contribution presents the first SIMS U-Pb age of 270.8 +- 7.5 Ma obtained so far for the U-mineralization from the Bohemian Massif. This age coincides with the main U mineralizing events in the entire Variscan Orogenic Belt, including large metallogenic provinces in the Massif Central, Armorican Massif, Black Forest, and Erzgebirge. The recognition of the Permian mineralizing event indicates that the metallogenesis of U-deposits in the Bohemian Massif was linked to the lithospheric extensional events responsible for the coeval exhumation of the metamorphic complexes and the formation of the Late Carboniferous to Lower Permian sedimentary basins that generated oxidizing basinal fluids percolating through and liberating U from the crystalline basement. The AFT thermochronology along with U-Pb apatite dating reflects the rapid Permian exhumation of the crystalline basement, which allowed the influx of oxidized basinal brines mixed with meteoritic waters, which are the most important ore-forming fluids in the entire European Variscan Belt.

Název v anglickém jazyce

Metallogenesis of vein-type U-deposits in the Bohemian Massif, constrained by U–Pb uraninite-apatite dating and AFT thermochronology

Popis výsledku anglicky

Although the Bohemian Massif hosts significant vein-type U-deposits associated with shear zones, their metallogenetic model in the frame of the Central European Variscides is poorly constrained due to the lack of geochronological data. This contribution presents the first SIMS U-Pb age of 270.8 +- 7.5 Ma obtained so far for the U-mineralization from the Bohemian Massif. This age coincides with the main U mineralizing events in the entire Variscan Orogenic Belt, including large metallogenic provinces in the Massif Central, Armorican Massif, Black Forest, and Erzgebirge. The recognition of the Permian mineralizing event indicates that the metallogenesis of U-deposits in the Bohemian Massif was linked to the lithospheric extensional events responsible for the coeval exhumation of the metamorphic complexes and the formation of the Late Carboniferous to Lower Permian sedimentary basins that generated oxidizing basinal fluids percolating through and liberating U from the crystalline basement. The AFT thermochronology along with U-Pb apatite dating reflects the rapid Permian exhumation of the crystalline basement, which allowed the influx of oxidized basinal brines mixed with meteoritic waters, which are the most important ore-forming fluids in the entire European Variscan Belt.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/EF16_026%2F0008459" target="_blank" >EF16_026/0008459: Dlouhodobý výzkum geochemických bariér pro ukládání jaderného odpadu</a><br>

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

18th Biennial SGA Meeting - Proceedings Volume 1

ISBN

979-8-90030-538-7

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

146-149

Název nakladatele

The Society for Geology Applied to Mineral Deposits (SGA)

Místo vydání

Colorado, USA

Místo konání akce

Golden - Colorado

Datum konání akce

3. 8. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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