| Titre | Geochemical, mineralogical, and textural data from tills in the Highland Valley Copper mine area, south-central British Columbia |
| Télécharger | Téléchargements |
| Auteur | Ferbey, T; Plouffe, A; Bustard, A L |
| Source | Commission géologique du Canada, Dossier public 8119, 2016, 20 pages, https://doi.org/10.4095/299242 |
| Année | 2016 |
| Séries alt. | British Columbia Geological Survey, Geofile 2016-11 |
| Éditeur | Ressources naturelles Canada |
| Document | dossier public |
| Lang. | anglais |
| DOI | https://doi.org/10.4095/299242 |
| Media | en ligne; numérique |
| Liens | readme
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| Formats | pdf |
| Province | Colombie-Britannique |
| SNRC | 92I/05; 92I/06; 92I/09; 92I/10 |
| Lat/Long OENS | -121.5000 -120.5000 50.7500 50.2500 |
| Sujets | dépôts glaciaires; tills; profils de dispersion; directions des mouvements de la glace; minéralisation; gisements porphyriques; mines; cuivre; molybdène; glaciation; or; sulfures; géochimie des éléments
en trace; géochimie du till; analyses de till; Batholite de Guichon Creek ; minéraux métalliques; géochimie; géologie des dépôts meubles/géomorphologie; minéralogie; Quaternaire |
| Illustrations | location maps; photographs; ternary diagrams; cross-sections; flow charts; photomicrographs |
| Consultation | |
| Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre) |
| |
| Programme | Étude des gîtes porphyriques, Initiative géoscientifique ciblée (IGC-4) |
| Diffusé | 2016 11 02 |
| Résumé | (disponible en anglais seulement)
Although rocks of Quesnel terrane in the Intermontane Belt of south-central British Columbia have long-been known as prolific producers of porphyry
mineralization, much of the bedrock in the region is covered by glacial sediments. Nonetheless, geochemical and mineralogical data, particularly from locally derived tills, can help detect deposits buried under Quaternary sediments. We collected till
samples from 99 sites near the Highland Valley Copper mine for geochemical, indicator mineral, and grain size determinations to test the utility of the method at a site where the configuration and tenor of ore-grade porphyry Cu mineralization are
known. Landform-scale features such as drumlins, flutings, crag-and-tails mapped on aerial photographs, outcrop-scale features such as striations, grooves, and rat tails measured in the field, and data from previous studies indicate a relatively
simple regional Late Wisconsinan ice-flow history with generally southward sediment transport, making provenance determinations on subglacial tills relatively straightforward. Commonly a first derivative of bedrock, subglacial till is the ideal
sample medium for till geochemical and mineralogical surveys. Most of our samples were taken from a regionally developed till facies interpreted as a subglacial till deposited by moving ice (well compacted, markedly fissile, massive, cobble-boulder
diamicton with a relatively clay-rich matrix and abundant faceted and striated clasts). For comparison, we also collected from a more locally developed till facies interpreted as an ablation till (poorly compacted, non-fissile, massive cobble-boulder
diamicton with a relatively clay-deficient matrix) that overlies the subglacial till. Quality assurance/quality control results indicate that, uncontrolled by analytical artefact, the geochemical and mineralogical results for the dataset presented
herein are suitable for geological interpretations that will be considered in future publications. |
| Résumé | (Résumé en langage clair et simple, non publié)
Le gîte Highland Valley Copper (HVC) est la plus grosse mine de cuivre à ciel ouvert au Canada. Il existe un potentiel minéralogique dans la
Cordillère canadienne propice à la découverte d¿autres gîtes similaires à HVC mais le défi est la présence de sédiments glaciaires qui recouvrent de la minéralisation potentiellement économique et qui rend l'exploration minérale difficile. Par
contre, la composition du sédiment glaciaire (sa teneur en métaux et son contenu en minéraux) peut fournir de l'information sur la composition de la roche sous-jacente et son potentiel minéralogique. Dans notre étude, nous démontrons que certains
minéraux et métaux sont plus abondants dans le sédiment glaciaire près de HVC comparativement aux régions environnantes. Les mêmes analyses pourront donc être faites sur le sédiment glaciaire dans le but de découvrir des gîtes couverts par le
sédiment glaciaire. |
| GEOSCAN ID | 299242 |
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