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TitrePreliminary field observations at the Klaza deposit and nearby Kelly and Cyprus porphyry centres, Dawson Range, Yukon
TéléchargerTéléchargement (publication entière)
AuteurLee, W -S; Chapman, J B; Richards, J P
SourceTargeted Geoscience Initiative: 2017 report of activities, volume 1; par Rogers, N (éd.); Commission géologique du Canada, Dossier public 8358, 2018 p. 15-22, https://doi.org/10.4095/306399
Année2018
ÉditeurRessources naturelles Canada
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/306399
Mediaen ligne; numérique
Référence reliéeCette publication est contenue dans Rogers, N; (2018). Targeted Geoscience Initiative: 2017 report of activities, volume 1, Commission géologique du Canada, Dossier public 8358
Formatspdf
ProvinceYukon
SNRC115G/15; 115G/16; 115H/13; 115H/14; 115I/03; 115I/04; 115I/05; 115I/06; 115I/11; 115I/12; 115J/01; 115J/02; 115J/07; 115J/08; 115J/09; 115J/10
Lat/Long OENS -62.6667 -62.6667 61.8333 61.8333
Sujetsgisements minéraux; prospection minière; potentiel minier; gisements porphyriques; gîtes épithermaux; métaux; or; argent; plomb; zinc; cuivre; métaux de base; genèse des minerais; contrôles des minerais; contrôles structuraux; altération; intrusions; filons; filons rocheux; veinules; quartz; feldspath; pyrite; chalcopyrite; sulfures; carbonates; sphalérite; galène; eprentes; phénocristaux; minéralisation; zonation minéralogique; analyses de carottes de sondage; diagraphie géophysique; métallogénie; paragenèse; système hydrothermal; cadre tectonique; formation de brèches; magmatisme; tendances structurelles; datation radiométrique; datation argon-argon; datation au uranium-plomb; caractéristiques structurales; failles; fractures; géologie du substratum rocheux; lithologie; roches ignées; roches intrusives; brèches; Suite Plutonique de Prospector Mountain ; Suite Plutonique de Whitehorse ; Terrane de Stikinia ; Terrane de Quesnellia ; Terrane de Yukon-tanana; géologie économique; tectonique; géologie structurale; géophysique; géochronologie; Phanérozoïque; Cénozoïque; Tertiaire; Mésozoïque; Crétacé; Jurassique
Illustrationslocation maps; geoscientific sketch maps; photographs; geochronological charts
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
ProgrammeGestion de la connaissance de IGC, Initiative géoscientifique ciblée (IGC-5)
ProgrammeSystèmes porphyriques, Initiative géoscientifique ciblée (IGC-5)
Diffusé2018 01 19
Résumé(disponible en anglais seulement)
The Klaza deposit is a structurally controlled, polymetallic gold-silver-base metal intermediate sulphidation epithermal system, located within the Dawson Range Gold Belt, central Yukon. The Klaza deposit has four zones with varying vein complexity, ore grade and interaction with local porphyritic quartz-feldspar ('QFP') dykes. This study aims to develop a clear understanding of the genesis and fluid evolution of the Klaza deposit. Preliminary field observations include that the high gold-grade intervals of stockwork and sheeted quartz pyrite veins display two dominant structural orientations and phyllic (quartz-pyrite-sericite) alteration. Massive quartz-pyrite ± chalcopyrite goldbearing veins cut the stockwork and sheeted veins. Silver-rich base metal sulfide veins at Central Klaza cut both vein types, indicating an early, high grade gold mineralization event followed by a later Ag-rich event. The main mineralization stage is followed by late stage carbonate veins, which are largely unmineralized in the Central Klaza zone, but contain euhedral sphalerite and galena in the Western BRX zone. High resolution re-logging of drill core revealed subtle textural and compositional differences between dykes previously logged as undifferentiated 'QFP' across the Central Klaza zone. Three types of dyke compositions are distinguishable in the field based on quartz phenocryst abundance and cross cutting relationships. A Type 1 mafic dyke is cut by Stage 1 early quartz-pyrite veinlets. The Type 2 felsic dykes are cut by Stage 4 base metal veins, while the Type 3 intermediate dyke is in contact with Type 2 dykes and is uncut by mineralization.
GEOSCAN ID306399