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TitrePreliminary 3D modelling and structural interpretation of southeastern Athabasca Basin
TéléchargerTéléchargements
AuteurLi, Z; Bethune, K M; Chi, G; Bosman, S A; Card, C D
SourceCommission géologique du Canada, Dossier public 7426, 2013, 21 pages, https://doi.org/10.4095/292715
Année2013
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/292715
Mediaen ligne; numérique
Formatspdf
ProvinceSaskatchewan
SNRC74A/13; 74G/01; 74G/08; 74H/03; 74H/04; 74H/05; 74H/06; 74H/07; 74H/10; 74H/11; 74H/12; 74H/13; 74H/14; 74H/15; 74I/03; 74I/04
Lat/Long OENS-106.5000 -104.5000 58.2500 56.7500
Sujetsmagmatisme; roches ignées; gisements minéraux; gîtes minéralogiques; uranium; discordances; caractéristiques structurales; interpretations structurelles; analyses structurales; prospection minière; gisements d'uranium; minéralisation; géologie du socle; Bassin d'Athabasca ; Groupe d'Athabasca ; géologie structurale; stratigraphie; Protérozoïque; Précambrien
Illustrationsphotomicrographs; location maps; cross-sections; images; rose diagrams
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeÉtude des gîtes d'uranium, Initiative géoscientifique ciblée (IGC-4)
Diffusé2013 07 03
Résumé(disponible en anglais seulement)
The southeastern portion of the Athabasca basin hosts the largest high-grade unconformity-related uranium deposits in the world, including the McArthur River and Key Lake deposits. As a first step of an effort to reconstruct and model the fluid flow related to uranium mineralization, a 3D model of the sub-Athabasca unconformity and basin stratigraphy has been constructed using publicly available geological, geophysical and drill-hole data. Several cross-sections have been built and integrated into the 3D model to constrain the spatial configuration of Athabasca Group units. Faults have been identified using an iterative approach where potential fault lineaments were identified using the basement geophysical signature then confirmed by the presence of spatial relationships to offsets of the unconformity surface. Using this approach, three dominant sets of faults, inferred to be subvertical, have been identified in the study area: northeast trending, north-northwest trending and northwest trending. In the 3D model, the unconformity surface shows an approximately northeasttrending zone of elevated topography where elevations change abruptly (SE to NW) from about -100 m to +200 m (referenced to mean sea level). This topographic ridge of the unconformity surface is associated with the Phoenix - McArthur River deposits trend. A preliminary cross-section illustrates that this topographic high may be controlled by northeast-trending reverse faults that have uplifted the basement. Regional clay anomalies in the Athabasca Group and the majority of deposits and prospects are also broadly coincident with this feature. Future work will be focussed on increasing resolution of the model in this and other key areas to gain a better understanding of the geometry and kinematics of regional plus local structures and their control on fluid flow and uranium mineralization.
Résumé(Résumé en langage clair et simple, non publié)
Rapport intérimaire qui documente les relations spatiales entre les failles et les gisements de minerai d¿uranium de la Partie est du bassin d¿Athabasca. Les observations sont fondées sur un modèle tridimensionnel (3D) préliminaire qui permet la visualisation des diverses unités et caractéristiques structurales (failles) géologiques qui ont contrôlé la formation des gisements de minerai.
GEOSCAN ID292715