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

Result code in 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>

Result on the web

<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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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10505 - Geology

Project

<a href="/en/project/EF16_026%2F0008459" target="_blank" >EF16_026/0008459: Long-term research of geochemical barriers for nuclear waste disposal</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Article name in the collection

18th SGA Biennial Meeting 2025, Volume 2

ISBN

9798900305400

ISSN

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e-ISSN

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Number of pages

4

Pages from-to

655-658

Publisher name

Society for Geology Applied to Mineral Deposits (SGA)

Place of publication

Colorado

Event location

Golden, School of Mines

Event date

Aug 3, 2025

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001669851400079