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TitreProcessing methods for recovery of indicator minerals from sediment and bedrock
AuteurMcClenaghan, M B
SourceExploration 07: Indicator mineral methods in mineral exploration, Workshop 3, course notes; par Thorleifson, L H; McClenaghan, M B; 2007 p. 15-19; 1 CD-ROM
Séries alt.Secteur des sciences de la Terre, Contribution externe 20070172
RéunionExploration 07, Exploration in the new Millennium, 5th Decennial International Conference on Mineral Exploration; Toronto; CA; Septembre 9, 2007
Documentfichier d'ordinateur
MediaCD-ROM; numérique
Référence reliéeCette publication est contenue dans Thorleifson, L H; McClenaghan, M B; (2007). Exploration 07: Indicator mineral methods in mineral exploration, Workshop 3, course notes
Sujetséléments d'indice; minéraux lourds; analyses des minéraux lourds; prospection minière; or; nickel; cuivre; diamant; platine; uranium; tungstène; sulfures; densités; analyses granulométriques; analyse granulométriques; méthodes analytiques; géologie économique; minéralogie; géochimie
Illustrationsphotographs; tables; flow charts
ProgrammeInitiative géoscientifique ciblée (IGC-3), 2005-2010
Résumé(disponible en anglais seulement)
The application of indicator mineral methods to mineral exploration has grown and developed significantly over the past two decades. They are used around the world to explore for a broad spectrum of commodities. Heavy mineral suites now exist for detecting a variety of ore deposit types including diamond, gold, Ni-Cu, PGE, porphyry Cu, massive sulphide, uranium, and tungsten. Indicator minerals, including ore and accessory minerals, are usually sparsely distributed in their host rocks. They may be sparser in derived sediments, thus sediment samples must be concentrated in order to recover and examine them. Most indicator minerals have a moderate to high specific gravity, thus most processing techniques concentrate indicator minerals using some type of density separation, often in combination with sizing and/or magnetic separations. Samples are processed to reduce the volume of material that must be examined. In reducing the volume of material, processing techniques must be able to retain the indicator mineral(s) and do so without contaminating the sample, without losing indicator minerals, and at a reasonable cost. This paper summarizes processing and heavy mineral recovery techniques that are used to recover a wide variety of indicator minerals from sediment and bedrock samples.