Abstract
Refractory ores can be classified into four types according to mineralogical criteria. One of these types contains “invisible” gold dispersed in the form of a solid solution or sub-micron inclusions in sulphide minerals. Analysis of gold in most sulphide minerals requires detection limits of fractional parts per million such that electron microprobes with detection limits of about 200 ppm for gold cannot determine gold in solid solution in common sulphides. Surface Science Western has developed a unique quantitative method combining an ion microprobe, secondary ion mass spectrometry and ion implantation to determine gold in solid solution in pyrite, arsenopyrite, pyrrhotite, chalcopyrite and sulpho salts to less than 0.5 ppm. In addition, the in-depth profiling capability of the microprobe allows the identification of sub-micron inclusions.
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Schedule a callMore From: Proceedings of the Metallurgical Society of the Canadian Institute of Mining and Metallurgy
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