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%2F00216224%3A14310%2F25%3A00142013" target="_blank" >RIV/00216224:14310/25:00142013 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.e-sga.org/publications/conference-proceedings" target="_blank" >https://www.e-sga.org/publications/conference-proceedings</a>

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

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

18th SGA Biennial Meeting 2025, Volume 2

ISBN

9798900305400

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

655-658

Název nakladatele

Society for Geology Applied to Mineral Deposits (SGA)

Místo vydání

Colorado

Místo konání akce

Golden, School of Mines

Datum konání akce

3. 8. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001669851400079