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TitreStructural and lithological controls on gold mineralization at the Cheminis mine: implications for the formation of gold deposits along the Larder Lake - Cadillac deformation zone, Ontario
TéléchargerTéléchargement (publication entière)
AuteurLafrance, B
SourceTargeted Geoscience Initiative 4: Contributions to the understanding of Precambrian lode gold deposits and implications for exploration; par Dubé, B (éd.); Mercier-Langevin, P (éd.); Commission géologique du Canada, Dossier public 7852, 2015 p. 49-54, https://doi.org/10.4095/296628
Année2015
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/296628
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Dubé, B; Mercier-Langevin, P; (2015). Targeted Geoscience Initiative 4: Contributions to the understanding of Precambrian lode gold deposits and implications for exploration, Commission géologique du Canada, Dossier public 7852
Formatspdf
ProvinceOntario
SNRC32D/03; 32D/04
Lat/Long OENS -80.0000 -79.0000 78.2500 78.0000
Sujetsfilons de quartz; Archéen; or; minéralisation; déformation; analyses structurales; interpretations structurelles; Zone de déformation de Larder Lake-cadillac ; géologie économique; géologie structurale; Précambrien
Illustrationslocation maps; photographs; photomicrographs
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeÉtude des gîtes d'or, Initiative géoscientifique ciblée (IGC-4)
Diffusé2015 06 11
Résumé(disponible en anglais seulement)
The Larder Lake-Cadillac deformation zone (LLCDZ) is a major deformation zone within the southern Abitibi subprovince of the Archean Superior Province. It hosts several gold deposits, including the Cheminis and the giant Kerr Addison - Chesterville deposits in Ontario. The two deposits occur along a strongly deformed band of Fe-rich tholeiitic basalt and komatiite of the Larder Lake Group (ca. 2705 Ma), bounded on both sides by younger, less deformed, Timiskaming turbidite (2680-2670 Ma). Gold was emplaced during D2 closure of an extensional Timiskaming basin, following the formation of early F1 folds. D2 deformation was a progressive compressive deformation event that began with regional F2 folding and the formation of a regional S2 cleavage, and ended with the localization of the deformation along the band of older volcanic rocks, the formation of the LLCDZ, and the introduction of gold during south-side-up reverse-slip faulting along the LLCDZ. The presence of weakly deformed syenite dykes suggests a minor magmatic contribution to the gold-bearing hydrothermal fluids. Thus, gold was deposited as hydrothermal fluids flowed upward along the LLCDZ during D2 south-side-up shearing.
GEOSCAN ID296628