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Journal of the Southern African Institute of Mining and Metallurgy

versão On-line ISSN 2411-9717
versão impressa ISSN 0038-223X

J. S. Afr. Inst. Min. Metall. vol.110 no.6 Johannesburg Jun. 2010




Sampling mineral commodities - the good, the bad, and the ugly



R.J. Holmes

Carbon Steel Materials, CSIRO Minerals Down Under National Research Flagship, Australia




A wide range of drill holes and process streams are sampled for resource estimation, grade control, and contractual purposes in the minerals industry. However, despite the availability of training courses, conferences and both national and international standards on correct sampling practices, it is still surprising how often little attention is given to ensuring that representative samples are collected for analysis. The reason for this is that the responsibility for sampling is often entrusted to personnel who do not appreciate the significance and importance of sampling, with cost being the main driving force rather than whether the sample is representative of the material from which it was extracted. This seriously undermines the precision and accuracy of the analyses subsequently generated and can render the analysis process a total waste of time and money and expose mining companies to serious, potential, financial losses. Company management needs to reverse this situation and ensure that sampling is given the attention it deserves to generate representative samples for analysis.



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1. HOLMES, R.J. Correct Sampling and Measurement -The Foundation of Metallurgical Accounting, Chemometrics and Intelligent Laboratory Systems, vol. 74, 2004. pp. 71-83.         [ Links ]

2. GY, P.M. Sampling of Particulate Materials. Theory and Practice, 2nd Edition, Elsevier, Amsterdam, 1982.         [ Links ]

3. PITARD, F.F. Pierre Gy's Sampling Theory and Sampling Practice, 2nd Edition, CRC Press Inc, Florida, 1993.         [ Links ]

4. PITARD, F.F. Blasthole sampling for grade control-The many problems and solutions, Proceedings Sampling 2008, 27-29 May 2008, Perth, Australia The Australasian Institute of Mining and Metallurgy, Melbourne.         [ Links ]

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