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TitreThe Paleoproterozoic Lalor Auriferous VMS Deposit, Snow Lake, Manitoba: Preliminary Observations on the Nature and Architecture of the Hydrothermal System
AuteurMercier-Langevin, P; Caté, A; Duff, S; Hannington, M; Ross, P -S; Gagné, S; Dubé, B
SourceManitoba Mining and Minerals Convention 2012, abstracts; 2012 p. 1
LiensOnline - En ligne
Séries alt.Secteur des sciences de la Terre, Contribution externe 20130556
RéunionManitoba Mining and Minerals Convention 2012; Winnipeg; CA; Novembre 15-17, 2012
Documentpublication en série
Mediaen ligne; numérique
Lat/Long OENS-102.0000 -98.0000 56.0000 54.0000
Sujetsinterprétations géochimiques; gisements minéraux; assemblages de minéraux; minéralisation; or; gîtes volcanogènes; sulfures; déformation; métamorphisme; altération; altération hydrothermale; roches volcaniques; roches ignées; Ceinture de Flin Flon Greenstone ; géologie économique; géochimie; Précambrien; Protérozoïque
ProgrammeÉtude des gîtes de sulfures massifs volcaniques, Initiative géoscientifique ciblée (IGC-4)
Résumé(disponible en anglais seulement)
The GSC, in partnership with HudBay, the MGS, the INRS-ETE and the University of Ottawa, and in collaboration with Laurentian University, recently initiated a study of the Lalor auriferous VMS deposit in Snow Lake as part of the Targeted Geoscientific Initiative Phase 4 of NRCan. Lalor is the largest deposit of the Snow lake camp and also the richest in Au with approximately 27 Mt of ore at 2.8 g/t Au (75 t Au). It is predominantly characterized by distinct Zn-Pb-Cu±Au-Ag semimassive to massive sulphide lenses and by zones of Au-Ag-Pb±Cu disseminated sulphides. The ore zones are stratigraphically and/or structurally stacked in a complexly deformed and metamorphosed succession of intensely hydrothermally altered rocks attributed to the Chisel mature arc sequence that host other Zn-rich VMS deposits. Preliminary observations indicate that there are key mineral assemblages that can be traced and possibly used to vector within the Lalor footwall alteration system. Current work aims at refining the zonation and overprinting patterns based on detailed mineralogy, mineral chemistry and lithogeochemistry of the alteration and sulphide mineral assemblages. The overall objective is to identify the critical factors that controlled Au enrichment at Lalor and further advance our understanding of the specific processes controlling precious metal enrichments in VMS systems.