GEOSCAN, résultats de la recherche

Menu GEOSCAN


TitreChemistry of kimberlite indicator minerals and sphalerite derived from glacial sediments of northwest Alberta
TéléchargerTéléchargements
AuteurPlouffe, A; Paulen, R C; Smith, I R; Kjarsgaard, I M
SourceCommission géologique du Canada, Dossier public 5545, 2007, 40 pages; 1 CD-ROM, https://doi.org/10.4095/223895 (Accès ouvert)
LiensCanadian Database of Geochemical Surveys, downloadable files
LiensBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Année2007
Séries alt.Alberta Energy and Utilities Board / Alberta Geological Survey, Special Report 87
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/223895
MediaCD-ROM; numérique; en ligne
Référence reliéeCette publication est reliée Plouffe, A; Paulen, R C; Smith, I R; (2006). Indicator mineral content and geochemistry of glacial sediments from northwest Alberta (NTS 84L, M): new opportunities for mineral exploration, Commission géologique du Canada, Dossier public 5121
Liensreadme
Formatspdf (Adobe® Reader®); txt; xls (Microsoft Excel 2000)
ProvinceAlberta
SNRC84L; 84M
Lat/Long OENS-120.0000 -118.0000 60.0000 58.0000
Sujetsprospection minière; exploration de dépôts glaciaires; géochimie du till; roches mères; régions émettrices; diamant; dépôts glaciaires; tills; dépôts fluvioglaciaires; analyses géochimiques; analyses par microsonde électronique; anomalies géochimiques; analyses des minéraux lourds; kimberlites; sphalérite; galène; ilménite; pyrope; grenat; diopside; olivine; chromite; spinelle; corindon; rutile; soufre; zinc; fer; cadmium; cuivre; argent; selenium; indium; glaciation; directions des mouvements de la glace; directions du transport de la glace; Wisconsinien; profils de dispersion; roches ignées; magmas; Plateau d'Alberta ; Dépôt de Pine Point ; Zone de cisaillement de Great Slave Lake ; Calotte glaciaire Laurentide; géologie économique; géologie des dépôts meubles/géomorphologie; géochimie; Cénozoïque; Quaternaire
Illustrationssketch maps; tables; digital elevation models; photomicrographs; photographs; plots; scatter plots
ProgrammeL'Initiative géoscientifique ciblée (IGC-2), 2003-2005
ProgrammeLa mise en valeur des ressources du Nord
Diffusé2007 06 01
Résumé(disponible en anglais seulement)
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 ID223895