GEOSCAN, résultats de la recherche


TitreProcessing of glacial sediments for the recovery of indicator minerals: protocols used at the Geological Survey of Canada
AuteurPlouffe, A; McClenaghan, M B; Paulen, R C; McMartin, I; Campbell, J E; Spirito, W A
SourceGeochemistry: Exploration, Environment, Analysis vol. 13, no. 4, 2013 p. 303-316,
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110278
ÉditeurThe Geological Society of London
Documentpublication en série
Mediapapier; en ligne; numérique
Référence reliéeCette publication est reliée à Spirito, W A; McClenaghan, M B; Plouffe, A; McMartin, I; Campbell, J E; Paulen, R C; Garrett, R G; Hall, G E M; (2011). Till sampling and analytical protocols for GEM Projects: from field to archive, Commission géologique du Canada, Dossier public 6850
Formatspdf; html
Sujetséléments d'indice; dépôts glaciaires; prospection minière; méthodes d'exploration; preparation d'échantillons; échantillons de till; exploration de dépôts glaciaires; techniques de prospection
Illustrationsphotographs; tables; flow charts
ProgrammeBases de données couvrant les trois territoires (minéraux indicateurs), GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
A successful method of mineral exploration in glaciated terrain is the use of indicator minerals recovered from glacial sediments, and subsequently traced back to their bedrock source. The application of indicator mineral methods to diamond exploration is well established because a great deal of research has focused on indicator mineral suites characteristic of diamondiferous kimberlites. Indicator minerals associated with a variety of other mineral deposit types are being studied and methods developed. The successful application of indicator mineral methods relies on efficient and cost-effective recovery as well as the correct identification of a wide variety of indicator minerals. The Geological Survey of Canada (GSC) has developed protocols for ongoing and future research projects to achieve the highest quality for reporting indicator mineral data. Such protocols include the use of field duplicate samples, blank samples, and base material spiked with known numbers, species, and sizes of indicator minerals. Duplicate and spiked samples are used to monitor the precision and reproducibility of the sample processing and mineral identification methods for recovering specific minerals. Blank samples serve to detect potential carry-over contamination. In certain instances, a sample processing order is essential and should be communicated to the commercial processing laboratory. Ore-rich samples collected near known mineralization are to be processed last, to reduce chances of carry-over contamination. Replicate indicator mineral counts should be carried out on at least 10% of the heavy mineral concentrates to measure reproducibility of the mineral counts. All indicator mineral data, original laboratory reports, heavy mineral concentrates, unmounted picked grains, and grain mounts are now archived at the GSC, using specific guidelines.