| Title | Chemistry of kimberlite indicator minerals and sphalerite derived from glacial sediments of northwest Alberta |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Plouffe, A ;
Paulen, R C; Smith, I R; Kjarsgaard, I M |
| Source | Geological Survey of Canada, Open File 5545, 2007, 40 pages; 1 CD-ROM, https://doi.org/10.4095/223895  Open Access |
| Links | Canadian Database of Geochemical Surveys, downloadable
files
|
| Links | Banque de données de levés géochimiques du Canada,
fichiers téléchargeables
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| Year | 2007 |
| Alt Series | Alberta Energy and Utilities Board / Alberta Geological Survey, Special Report 87 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | CD-ROM; digital; on-line |
| Related | This publication is related to Indicator mineral content and
geochemistry of glacial sediments from northwest Alberta (NTS 84L, M): new opportunities for mineral exploration |
| File format | readme
|
| File format | pdf (Adobe® Reader®); txt; xls (Microsoft Excel 2000) |
| Province | Alberta |
| NTS | 84L; 84M |
| Area | Zama 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 |
| Subjects | economic 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 |
| Illustrations | sketch maps; tables; digital elevation models; photomicrographs; photographs; plots; scatter plots |
| Program | Targeted Geoscience Initiative (TGI-2), 2003-2005 |
| Program | Northern Resources Development Program |
| Released | 2007 06 01 |
| Abstract | Plouffe 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. |
| GEOSCAN ID | 223895 |
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