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TitleChemistry of kimberlite indicator minerals and sphalerite derived from glacial sediments of northwest Alberta
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorPlouffe, AORCID logo; Paulen, R CORCID logo; Smith, I RORCID logo; Kjarsgaard, I M
SourceGeological Survey of Canada, Open File 5545, 2007, 40 pages; 1 CD-ROM, Open Access logo Open Access
LinksCanadian Database of Geochemical Surveys, downloadable files
LinksBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Alt SeriesAlberta Energy and Utilities Board / Alberta Geological Survey, Special Report 87
PublisherNatural Resources Canada
Documentopen file
MediaCD-ROM; digital; on-line
RelatedThis publication is related to Indicator mineral content and geochemistry of glacial sediments from northwest Alberta (NTS 84L, M): new opportunities for mineral exploration
File formatreadme
File formatpdf (Adobe® Reader®); txt; xls (Microsoft Excel 2000)
NTS84L; 84M
AreaZama Lake; Bistcho Lake; Chinchaga River; Hay River; Cameron Hills; Bootis Hill; Elsa Hill; Zama City; Rainbow Lake
Lat/Long WENS-120.0000 -118.0000 60.0000 58.0000
Subjectseconomic geology; surficial geology/geomorphology; geochemistry; mineral exploration; drift prospecting; till geochemistry; source rocks; source areas; diamond; glacial deposits; tills; glaciofluvial deposits; geochemical analyses; electron probe analyses; geochemical anomalies; heavy mineral analyses; kimberlites; sphalerite; galena; ilmenite; pyrope; garnet; diopside; olivine; chromite; spinel; corundum; rutile; sulphur; zinc; iron; cadmium; copper; silver; selenium; indium; glaciation; ice movement directions; ice transport directions; Wisconsinian glacial stage; dispersal patterns; igneous rocks; magmas; Fort Nelson Lowland; Alberta Plateau; Pine Point Deposit; Great Slave Lake Shear Zone; Laurentide Ice Sheet; Keewatin Sector; Cenozoic; Quaternary
Illustrationssketch maps; tables; digital elevation models; photomicrographs; photographs; plots; scatter plots
ProgramTargeted Geoscience Initiative (TGI-2), 2003-2005
ProgramNorthern Resources Development Program
Released2007 06 01
AbstractPlouffe et al. (2006a) reported the presence of kimberlite indicator minerals (KIMs), and sand-sized sphalerite and galena grains in glacial sediments from northwest Alberta. In this report most of the KIMs, originally identified from optical properties alone, are now confirmed as such following detailed electron microprobe analyses. The exceptions to this are 1) fifteen grains originally classified as low Cr-diopside that are re-interpreted as KIMs because their Cr2O3 content exceeds 0.5 wt.%, and 2) one grain originally identified as chromite is re-classified as crustal ilmenite. These new results confirm the presence of anomalous concentrations of KIMs in three glacial sediment (till) samples and suggest that an unknown kimberlitic source is reflected in the glacial sediments of northwest Alberta. Electron microprobe analyses (n=180) were completed on 15 sphalerite grains recovered from till in the region of the sphalerite anomaly (Plouffe et al., 2006a). The sphalerite grains have an average composition of 33.4 wt.% S, 65.4 wt.% Zn, 0.7 wt.% Fe, 0.43 wt.% Cd, and trace amounts (0.3 to 0.1 wt.%) of Cu, Ag, Se, and In which is slightly different from the sphalerite from the Pine Point deposit.

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