Zr-U-Th-Phases in Clinohumite-Spinel-Bearing Marbles as Potential Tracers of HFSE-Fertile Granitic Rocks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F25%3A10169532" target="_blank" >RIV/00025798:_____/25:10169532 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Zr-U-Th-Phases in Clinohumite-Spinel-Bearing Marbles as Potential Tracers of HFSE-Fertile Granitic Rocks

Popis výsledku v původním jazyce

Abundant clinohumite-spinel-bearing marbles in the eastern part of the Moldanubian Zone of the Bohemian Massif (Czech Republic) typically host Zr-U-Th phase assemblages involving zirconolite, baddeleyite, zircon, uranothorite and thorianite. Although the provenance of the HFSE source is generally considered inside the marbles, usually of detrital and/or metamorphic origin, our current observations suggest the import of Zr, U and Th from an external source. The textural features and chemical composition of the Zr-U-Th phases point towards the influx of late-magmatic hydrothermal fluids most likely generated during the emplacement of the HFSE-fertile durbachite plutons from the Moldanubian Zone, in line with previous EMP chemical dating of zirconolite from the marbles. Accordingly, common occurrences of F-rich clinohumite, phlogopite and fluorapatite in the studied marbles possibly reflect infiltration of F-, K-and P-rich fluids that may represent crucial complexing ligands for fluid-driven HFSE mobilization. Taken together, this case study suggests that hydrothermally-derived Zr-U-Th minerals in metacarbonates can be used as potential tracers of HFSE-fertile granitic rocks, which can play a crucial role in the future exploration of economically important ore deposits worldwide.

Název v anglickém jazyce

Zr-U-Th-Phases in Clinohumite-Spinel-Bearing Marbles as Potential Tracers of HFSE-Fertile Granitic Rocks

Popis výsledku anglicky

Abundant clinohumite-spinel-bearing marbles in the eastern part of the Moldanubian Zone of the Bohemian Massif (Czech Republic) typically host Zr-U-Th phase assemblages involving zirconolite, baddeleyite, zircon, uranothorite and thorianite. Although the provenance of the HFSE source is generally considered inside the marbles, usually of detrital and/or metamorphic origin, our current observations suggest the import of Zr, U and Th from an external source. The textural features and chemical composition of the Zr-U-Th phases point towards the influx of late-magmatic hydrothermal fluids most likely generated during the emplacement of the HFSE-fertile durbachite plutons from the Moldanubian Zone, in line with previous EMP chemical dating of zirconolite from the marbles. Accordingly, common occurrences of F-rich clinohumite, phlogopite and fluorapatite in the studied marbles possibly reflect infiltration of F-, K-and P-rich fluids that may represent crucial complexing ligands for fluid-driven HFSE mobilization. Taken together, this case study suggests that hydrothermally-derived Zr-U-Th minerals in metacarbonates can be used as potential tracers of HFSE-fertile granitic rocks, which can play a crucial role in the future exploration of economically important ore deposits worldwide.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/SS02030023" target="_blank" >SS02030023: Horninové prostředí a suroviny</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

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 2

ISBN

979-8-90030-538-7

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

655-658

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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