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TitreSelwyn Basin magmatism and relationship to sediment-hosted Zn-Pb deposits
TéléchargerTéléchargement (publication entière)
AuteurLeybourne, M I; Van Wagoner, N; Paradis, S; Layton-Matthews, D; Moertle, J A
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 2; par Rogers, N (éd.); Commission géologique du Canada, Dossier public 8373, 2018 p. 71-92, https://doi.org/10.4095/306603
Année2018
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/306603
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 2, Commission géologique du Canada, Dossier public 8373
Formatspdf
ProvinceYukon; Territoires du Nord-Ouest; Colombie-Britannique
SNRC82; 83; 85; 86; 87A; 87B; 92P; 93; 94; 95; 96; 97; 104; 105; 106; 107; 115; 116; 117
Lat/Long OENS-150.0000 -114.0000 71.0000 49.0000
Sujetsgisements minéraux; prospection minière; potentiel minier; établissement de modèles; métaux; zinc; plomb; gîtes sédimentaires; gîtes sulfureux; gîtes volcanogènes; genèse des minerais; minéralisation; contrôles des minerais; bassins sédimentaires; cadre tectonique; magmatisme; antecedents thermiques; intrusions; filons rocheux; système hydrothermal; altération hydrothermale; géologie du substratum rocheux; lithologie; roches sédimentaires; schistes; carbonates; chailles; roches ignées; roches volcaniques; alcalinité; analyses géochimiques; géochimie du baryum; géochimie du césium; géochimie du niobium; géochimie du thorium; géochimie du thallium; etudes isotopiques; strontium; carbone; oxygène; datation radiométrique; datation au uranium-plomb; analyse par spectromètre de masse; analyses pétrographiques; rapports sur le terrain; lithogéochimie; analyses des éléments majeurs; analyses des éléments en trace; rapports des isotopes de plomb; Bassin de Selwyn ; Plate-forme de Mackenzie ; Formation de Canol ; Faille de Tintina ; géologie économique; tectonique; pétrologie ignée et métamorphique; géochimie; géochronologie; Phanérozoïque; Paléozoïque
Illustrationslocation maps; geoscientific sketch maps; photographs; photomicrographs; plots; ternary diagrams; bar graphs
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeGestion de la connaissance de IGC, Initiative géoscientifique ciblée (IGC-5)
ProgrammeSystèmes volcaniques et sédimentaires, Initiative géoscientifique ciblée (IGC-5)
Diffusé2018 03 01
Résumé(disponible en anglais seulement)
Paleozoic volcanic and intrusive rocks from the Selwyn Basin are being investigated to establish if there is genetic relationship between volcanism and sediment-hosted massive sulphide (SEDEX) mineralization with the aim of improving mineral exploration models. The spatial and temporal distribution of dominantly highly alkalic magmatism and SEDEX deposits in the Selwyn Basin are similar, but traditional models for SEDEX deposit formation have excluded any role of magmatism in their genesis. This study is testing whether magmatic systems supply heat and possibly metals and/or volatiles to the ore system. Herein we report preliminary petrological and geochemical data for samples from the Keno Hill, Anvil and MacMillan Pass districts, and Misty Creek Embayment.
Most of the volcanic rocks in the Anvil and MacMillan Pass districts are alkalic and mafic, although Paleozoic volcanic rocks and later dykes in the Keno Hill district are subalkalic. Significantly, most volcanic rocks in all districts are enriched to highly enriched in Ba, Cs, Nb and Th, and show a positive relationship between barium and thallium, similar to the Howards Pass SEDEX deposit, suggesting either the volcanic rocks have been altered by similar hydro-thermal fluids as those that generated SEDEX mineralization or that the volcanic rocks formed from magmas that may have contributed metals and metalloids (e.g. Ba, Tl) to ore-forming magmatic-hydrothermal fluids. Thallium, strontium, carbon and oxygen isotopic analysis, combined with U-Pb dating are planned to constrain the connections between alkalic volcanism and SEDEX formation in the Selwyn Basin.
GEOSCAN ID306603