| Titre | Application of Quaternary geology in a region with high potential for undiscovered Zn, Pb and Cu mineralization, southern Mackenzie region, Northwest Territories |
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| Auteur | Paulen, R C ;
Piercey, S J; King, R D; Smith, I R; Day, S J A |
| Source | L'Association géologique du Canada-L'Association minéralogique du Canada, Réunion annuelle conjointe, Recueil des résumés vol. 45, 2022 p. 174 |
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| Année | 2022 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20210685 |
| Éditeur | Association géologique du Canada |
| Réunion | GAC-MAC Halifax 2022; Halifax, NS; CA; mai 15-18, 2022 |
| Document | publication en série |
| Lang. | anglais |
| Media | numérique; en ligne |
| Formats | pdf |
| Province | Territoires du Nord-Ouest |
| Région | Southern Mackenzie region |
| Sujets | zinc; plomb; cuivre; minéralisation; Sciences et technologie; minéralogie |
| Programme | GEM-GéoNord : La géocartographie de l'énergie et des minéraux Coordination du programme GEM |
| Diffusé | 2022 05 15 |
| Résumé | (disponible en anglais seulement)
As part of the Geological Survey of Canada's GEM2 Program, Quaternary geology and mineralogical studies of till and stream sediments were undertaken in the
southwestern region of Great Slave Lake from 2017-2020. Multi-faceted research activities in the study area addressed the broad research question: 'Is there potential for additional carbonate-hosted sulphide deposits under the thick glacial
overburden between Hay River to Kakisa Lake and Fort Providence?' Fieldwork involved surficial mapping of NTS sheets 85C, 85F and 85G and included till and stream sediment heavy mineral sampling; no previous surficial mapping or surficial heavy
mineral data existed for these areas. The project also benefited from additional samples donated by the Northwest Territories Geological Survey collected as part of former Protected Area Strategy surveys. Heavy minerals were subjected to trace
element geochemical and isotopic analyses to elucidate potential mineralization source types, and eliminate known sources (i.e., Pine Point). Sulfide minerals preserved in the till and stream sediments (sphalerite, galena, chalcopyrite, arsenopyrite)
were analyzed for mineral chemistry and in-situ Pb and in situ and conventional S isotopes to test potential deposit sources of these grains. Sphalerite mineral chemistry (low Fe/Zn and Ge/Ga) and delta-34S signatures (-18.5 to +22.5 permille) and
galena mineral chemistry (high Ag/(Sb+Bi)) and delta-34S signatures, are indicative of deposition from low temperature fluids and potentially derived from carbonate-hosted Zn-Pb mineralization. The Ge/Ga in sphalerite and Pb isotope signatures of
galena, however, indicate that these grains could not have been derived from Pine Point and represent a unique, undiscovered source of mineralization. Chalcopyrite grains have high Cd/Zn ratios and delta-34S (-12.4 to +39.7 permille) values that are
also consistent with deposition from low temperature fluids and likely represent derivation from a sediment-hosted source (e.g., sediment-hosted Cu, Kipush-type, or MVT(?) mineralization). Our integrated Quaternary work with heavy mineral geochemical
and isotopic data indicate a strong potential for undiscovered Zn, Pb, and Cu mineralization occurring in bedrock concealed beneath Quaternary sediments in the region. |
| Sommaire | (Résumé en langage clair et simple, non publié)
Une mise à jour des données de l'activité superficielle du sud du Mackenzie GEM2 couplée à de nouvelles données sous l'activité Scheelite du sud
des Territoires du Nord-Ouest du GEM Geo-North. Il s'agit d'une présentation de conférence axée sur les nouveaux résultats des travaux de chimie minérale. Le message à retenir ici est de mettre en évidence le potentiel minéral d'une région avec peu
ou pas de découvertes minérales antérieures. |
| GEOSCAN ID | 329682 |
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