Skip to Main Content
GEOREF RECORD

Ferriferous and vanadiferous kaolinites from the hydrothermal alteration halo of the Cigar Lake uranium deposit (Canada)

C. Mosser, M. Boudeulle, F. Weber and A. Pacquet
Ferriferous and vanadiferous kaolinites from the hydrothermal alteration halo of the Cigar Lake uranium deposit (Canada)
Clay Minerals (September 1996) 31 (3): 291-299

Abstract

The uranium deposit (1350 Ma) of Cigar Lake (Canada) is surrounded by a late hydrothermal alteration halo (330 Ma) containing Fe-illites and kaolinites. Crystallochemical characterization of the kaolinites has been carried on the microscale using XRD, electron microscopy (SEM and TEM) coupled with EDX spectrometry and EPR. The large, well-crystallized particles show large amounts of Fe (0.9-1.8%) and V (0.3-0.5%). According to EPR measurements performed on both random powders and oriented samples, V occurs as the vanadyl ion VO (super 2+) , in substitution within the octahedral sheet of the kaolinite structure in the same way as Fe (super 3+) . Kaolinite growth proceeded through the hydrothermal alteration of anterior phyllosilicates devoid of V, induced by fluids which leached V-rich titano-magnetites in the surrounding sandstones.


ISSN: 0009-8558
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 31
Serial Issue: 3
Title: Ferriferous and vanadiferous kaolinites from the hydrothermal alteration halo of the Cigar Lake uranium deposit (Canada)
Affiliation: C.N.R.S., Centre de Geochimie de la Surface, Strasbourg, France
Pages: 291-299
Published: 199609
Text Language: English
Summary Language: French
Publisher: Mineralogical Society, London, United Kingdom
References: 33
Accession Number: 1997-047560
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. table
N49°00'00" - N60°00'00", W110°00'00" - W101°19'60"
Secondary Affiliation: Universite Claude Bernard Lyon I, FRA, FranceCOGEMA, FRA, France
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, Mineralogical Society of Great Britain and Ireland
Update Code: 199716
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal