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TitreOverview of common processing methods for recovery of indicator minerals from sediment and bedrock in mineral exploration
AuteurMcClenaghan, M B
SourceGeochemistry: Exploration, Environment, Analysis vol. 11, 2011 p. 265-278, https://doi.org/10.1144/1467-7873/10-IM-025
Année2011
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090319
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1144/1467-7873/10-IM-025
Mediapapier; en ligne; numérique
Formatspdf
Sujetsméthodes analytiques; minéraux lourds; prospection minière; séparation par gravité; densités; séparation magnétique; preparation d'échantillons; minéralogie
Illustrationsphotographs
ProgrammeProjet de recherche en zones profondes IGC-3, Initiative géoscientifique ciblée (IGC-3), 2005-2010
ProgrammeBases de données couvrant les trois territoires (minéraux indicateurs), GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
Over the past two decades, the application of indicator mineral methods to mineral exploration has expanded significantly such that they are now used to explore globally for a broad spectrum of commodities. Indicator mineral suites have been identified for a variety of ore deposit types including diamond, Au, Ni-Cu, PGE, metamorphosed volcanogenic massive sulphide, porphyry Cu, U, Sn and W. Indicator minerals, which include ore, accessory and alteration minerals, are sparse in unconsolidated sediments, thus sediment samples must be concentrated in order to recover and examine them. Because most indicator minerals have a moderate to high specific gravity, processing techniques involving density separation, in combination with sizing and magnetic separation, are used to recover them from sediment samples. This paper reviews the commonly used processing methods including panning, hydroseparation, tabling, Knelson concentrators, spiral concentrators, dense media separators, jigs and various types of magnetic separators, as well as mineral selection and mineral chemistry determinations. Monitoring of quality control is essential at each stage in these processing, picking and analytical procedures. When reporting indicator mineral results, processing methods, fraction weights and size ranges, and laboratory name should all be recorded, in addition to indicator mineral abundance data.
GEOSCAN ID261319