Large-scale HFSE and REE mobility linked to the formation of vein-type U-deposits in the Moldanubian Zone of the Bohemian Massif

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00132128" target="_blank" >RIV/00216224:14310/23:00132128 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00025798:_____/23:10168859

Výsledek na webu

<a href="https://e-sga.org/nc/publications/sga-biennial-meetings-abstract-volumes/2023-zurich/" target="_blank" >https://e-sga.org/nc/publications/sga-biennial-meetings-abstract-volumes/2023-zurich/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Large-scale HFSE and REE mobility linked to the formation of vein-type U-deposits in the Moldanubian Zone of the Bohemian Massif

Popis výsledku v původním jazyce

Multi-element EMP maps and analyses of major accessory phases and their possible alteration products from ultrapotassic rocks (durbachites), in combination with LA-ICP-MS analyses of hydrothermal U-mineralization, provided constraints on potential U source of vein-type U-deposits in the Moldanubian Zone of the Bohemian Massif. The extensive metal mobilization in durbachites, recorded by EMP imaging, was controlled by self-induced radiation damage (metamictization) and subsequent fluid-driven alteration of U-bearing phases (thorite, allanite, zircon). Unusual trace element signatures of low-T hydrothermal Umineralization (e.g., extremely high Zr, Nb, Ti, ΣREE) from the vein-type deposits reflect the large-scale HFSE and REE mobility via aqueous solutions. The character of late alteration of primary phases (zircon dissolution vs. resistance of apatite) and mineral assemblages of hydrothermal phases in durbachites (e.g., synchisite, Frich titanite, monazite) indicates the importance of alkali-, F-, and P-rich fluids in the formation of U-deposits. The infiltration of oxidized, highly alkaline basinal brines likely played a key role in HFSE and REE mobility during the Permian hydrothermal event, as suggested by EMP chemical dating of U-mineralization.

Název v anglickém jazyce

Large-scale HFSE and REE mobility linked to the formation of vein-type U-deposits in the Moldanubian Zone of the Bohemian Massif

Popis výsledku anglicky

Multi-element EMP maps and analyses of major accessory phases and their possible alteration products from ultrapotassic rocks (durbachites), in combination with LA-ICP-MS analyses of hydrothermal U-mineralization, provided constraints on potential U source of vein-type U-deposits in the Moldanubian Zone of the Bohemian Massif. The extensive metal mobilization in durbachites, recorded by EMP imaging, was controlled by self-induced radiation damage (metamictization) and subsequent fluid-driven alteration of U-bearing phases (thorite, allanite, zircon). Unusual trace element signatures of low-T hydrothermal Umineralization (e.g., extremely high Zr, Nb, Ti, ΣREE) from the vein-type deposits reflect the large-scale HFSE and REE mobility via aqueous solutions. The character of late alteration of primary phases (zircon dissolution vs. resistance of apatite) and mineral assemblages of hydrothermal phases in durbachites (e.g., synchisite, Frich titanite, monazite) indicates the importance of alkali-, F-, and P-rich fluids in the formation of U-deposits. The infiltration of oxidized, highly alkaline basinal brines likely played a key role in HFSE and REE mobility during the Permian hydrothermal event, as suggested by EMP chemical dating of U-mineralization.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Mineral Resources in a Changing World, 17th SGA Biennial Meeting 2023, Volume 3

ISBN

9782839940443

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

327-330

Název nakladatele

Society for Geology Applied to Mineral Deposits (SGA)

Místo vydání

Zurich

Místo konání akce

ETH Zurich

Datum konání akce

28. 8. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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