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TitleMineralogical and geochemical analyses of the Crowsnest Volcanics, southwest Alberta
DownloadDownload (whole publication)
AuthorBégin, N J; Beiersdorfer, R E; Ghent, E D
SourceCurrent research 1995-E/Recherches en cours 1995-E; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1995-E, 1995 p. 11-25, https://doi.org/10.4095/205184 (Open Access)
Year1995
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; (1995). Current research 1995-E, Geological Survey of Canada, Current Research no. 1995-E
File formatpdf
ProvinceBritish Columbia; Alberta
NTS82G/07; 82G/08; 82G/09; 82G/10
AreaColeman; Blairmore; Fernie
Lat/Long WENS-114.6667 -114.2500 49.7500 49.2500
Subjectsgeochemistry; igneous and metamorphic petrology; mineralogy; mineralogical analyses; analyses; whole rock analyses; major element analyses; trace element analyses; geochemical analyses; petrographic analyses; alteration; analcime; pressure-temperature conditions; metamorphic facies; zeolite facies; metamorphism; volcanic rocks; igneous rocks; base metal geochemistry; Crowsnest Volcanics Formation; Cretaceous
Illustrationssketch maps; analyses; photomicrographs
ProgramCanada-Alberta Agreement on Mineral Development, 1992-1995
Released1995 07 01
AbstractThe analcime-phyric rocks of the Crowsnest volcanics are dominated by breccias and epiclastic rocks. Igneous phenocrysts consist of sanidine feldspar, analcime, melanite-garnet, pyroxene, and titanite in a matrix with trachytic alignment of albite and sanidine laths. The Crowsnest Volcanics are altered to zeolite facies and contain veins of analcime±quartz, amygdular prehnite, and pore-filling cement of laumontite. The matrix is recrystallized to quartz, adularia, albite, and chlorite. Calcite veining and pseudomorphs over igneous minerals are also common. The veinal nature of the analcime is interpreted as a product of metamorphic alteration, as opposed to an igneous product. Physical conditions for this metamorphism are constrained by the stability of the zeolite minerals, at 1 to 3 kbar and 180 to 300°C. The potential for economic mineralization is low. Except for mafic inclusions, oxide and sulphide minerals are rare in the Crowsnest Volcanics. XRF whole rock chemistry shows that base metals content is very low.
GEOSCAN ID205184