The uranium metallogeny in the South Armorican detachment zones, Variscan belt, France: geology, tracing (in space and time), numerical modelling

Philippe Boulvais; Seconde Ntiharirizwa; Marc Poujol; Yannick Branquet; Nathan Cogné; Thibault Duretz; Christophe Ballouard; Et Al.

Conference papers

The uranium metallogeny in the South Armorican detachment zones, Variscan belt, France: geology, tracing (in space and time), numerical modelling

Philippe Boulvais ¹ Seconde Ntiharirizwa ¹ Marc Poujol ¹ Yannick Branquet ^{1, 2, 3, 4} Nathan Cogné ¹ Thibault Duretz ¹ Christophe Ballouard ⁵ Et Al.

1 GR - Géosciences Rennes

2 Rainbow Rare Earths

3 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327

4 Métallogénie - UMR7327

ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327

5 UJ - University of Johannesburg

Abstract : Uranium mineralization is common in geological environments where oxidized uranium bearing fluids interact with reduced lithologies. This was the case for Variscan detachments in the South Armorican Massif, France. Numerous syn-tectonic peraluminous granites were emplaced in the footwall of detachments during the Carboniferous. Surface-derived fluids infiltrated the detachment planes and leached out the uranium from the magmatic uraninite that crystallized in these granites at the end of magmatic differentiation. On their way back to the surface, these fluids interacted with reducing black schists, which triggered precipitation of hydrothermal uraninite. This conceptual model serves as a basis for thermal hydraulic-mechanical modeling.

Document type :

Conference papers

Domain :

Sciences of the Universe [physics] / Earth Sciences / Geochemistry

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https://hal-insu.archives-ouvertes.fr/insu-02442475
Contributor : Isabelle Dubigeon <>
Submitted on : Thursday, January 16, 2020 - 2:42:39 PM
Last modification on : Friday, February 19, 2021 - 4:22:04 PM

The uranium metallogeny in the South Armorican detachment zones, Variscan belt, France: geology, tracing (in space and time), numerical modelling

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The uranium metallogeny in the South Armorican detachment zones, Variscan belt, France: geology, tracing (in space and time), numerical modelling

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