Quality control of assay data: A review of procedures for measuring and monitoring precision and accuracy

Exploration and Mining Geology

Volumn 17, Issue 3-4, 2008, Pages 131-144

  Abzalov, M ^a,b  

^a MASSA Geoservices   (Australia)

^b Rio Tinto Limited Australia   (Australia)

Author keywords

Duplicates; Mining geology; QAQC; Standards

Indexed keywords

ACCURACY ASSESSMENT; ASSAY; DETECTION METHOD; MEASUREMENT METHOD; MONITORING; PRECISION; QUALITY CONTROL;

EID: 67449143459     PISSN: 09641823     EISSN: None     Source Type: Journal    
DOI: 10.2113/gsemg.17.3-4.131     Document Type: Article

References (34)

1. Abzalov, M.Z., 1999, Gold deposits of the Russian North East (the Northern Circum Pacific): Metallogenic overview, in AusIMM, eds., Proceedings of the PACRIM '99 symposium: Australasian Institute of Mining and Metallurgy, p. 701-714.
2. Abzalov, M.Z., 2007, Zarmitan granitoid-hosted gold deposit, Tian Shan belt, Uzbekistan: Economic Geology, v. 102, p. 519-532.
3. Abzalov, M.Z., and Both, R.A., 1997, The Pechenga Ni-Cu deposits, Russia: Data on PGE and Au distribution and sulphur isotope compositions: Mineralogy and Petrology, v. 61, p. 119-143.
4. Abzalov, M.Z., and Humphreys, M., 2002, Resource estimation of structurally complex and discontinuous mineralisation using non-linear geostatistics: Case study of a mesothermal gold deposit in northern Canada: Exploration and Mining Geology, v. 11, p. 19-29.
5. Abzalov, M.Z., and Mazzoni, P., 2004, The use of conditional simulation to assess process risk associated with grade variability at the Corridor Sands detrital ilmenite deposit, in Dimitrakopoulus, R., and Ramazan, S., eds., Ore body modelling and strategic mine planning: Uncertainty and risk management: Australasian Institute of Mining and Metallurgy, p. 93-101.
6. Abzalov, M.Z., and Pickers, N., 2005, Integrating different generations of assays using multivariate geostatistics: A case study: Transactions of Institute of Mining and Metallurgy, Section B: Applied Earth Science, v. 114, p. B23-B32.
7. Abzalov, M.Z., Menzel, B., Wlasenko, M., and Phillips, J., 2007, Grade control at Yandi iron ore mine, Pilbara region, Western Australia-Comparative study of the blastholes and Reverse Circulation holes sampling, in AusIMM, eds., Proceedings of the iron ore conference, 20-22 August, 2007, Perth, Western Australia: Australasian Institute of Mining and Metallurgy, p. 37-43.
8. Bumstead, E.D., 1984, Some comments on the precision and accuracy of gold analysis in exploration, in AusIMM, eds., Proceedings AusIMM: Australasian Institute of Mining and Metallurgy, No. 289, p. 71-78.
9. CANMET, 1998, Assessment of laboratory performance with certified reference materials: CANMET Canadian Certified Reference Materials Project Bulletin, 5 p.
10. Davis, J.C., 2002, Statistics and data analysis in geology, 3rd ed.: New York, John Wiley and Sons, 638 p.
11. Dominy, S.C., Annels, A.E., Johansen, G.F., and Cuffley, B.W., 2000, General considerations of sampling and assaying in a coarse gold environment: Transactions of Institute of Mining and Metallurgy, Section B: Applied Earth Science, v. 109, p. B145-B167.
12. Eremeev, A.N., Ostroumov, G.V., Anosov, V.V., Beren-shtein, L.E., Korolev, V.P., and Samonov, I.Z., 1982, Instruction on internal, external, and arbitrary quality control of the exploration samples assayed in the laboratories of the Ministry of Geology of the USSR: VIMS, Moscow, 106 p. (in Russian).
13. Francois-Bongarcon, D., 1998, Error variance information from paired data: Applications to sampling theory: Exploration and Mining Geology, v. 7, p. 161-165.
14. Garrett, R.G., 1969, The determination of sampling and analytical errors in exploration geochemistry: Economic Geology, v. 64, p. 568-574.
15. Goovaerts, P., 1997, Geostatistics for natural resources evaluation: New York, Oxford University Press, 483 p.
16. Howarth, R., and Thompson, M., 1976, Duplicate analysis in geochemical practice, Part 2: Examination of proposed method and examples of its use: The Analyst, v. 101, p. 699-709.
17. ISO Guide 33, 1989, Uses of certified reference materials:Standards Council of Canada, 12 p.
18. JORC Code, 2004, Australasian code for reporting of exploration results, mineral resources, and ore reserves: AusIMM, 20 p.
19. Kane, J.S., 1992, Reference samples for use in analytical geochemistry: Their availability, preparation, and appropriate use: Journal of Geochemical Exploration, v. 44, p. 37-63.
20. Leaver, M.E., Sketchley, D.A., and Bowman, W.S., 1997, The benefits of the use of CCRMP's custom reference materials: Canadian certified reference materials project: Society of Mineral Analysts Conference, MSL No. 637,16 p.
21. Long, S., 1998, Practical quality control procedures in mineral inventory estimation: Exploration and Mining Geology, v. 7, p. 117-127.
22. Pitard, F., 1998, A strategy to minimise ore grade reconciliation problems between the mine and the mill: Mine to Mill 1998 Conference, Brisbane, Australia, October 11 to 14, Australasian Institute of Mining and Metallurgy, p. 77-82.
23. Roden, S., and Smith, T., 2001, Sampling and analysis protocols and their role in mineral exploration and new resource development, in Edwards, A., ed., Mineral resources and ore reserve estimation-The AusIMM guide to good practise: Australasian Institute of Mining and Metallurgy, p. 73-78.
24. Shaw, W.J., 1997, Validation of sampling and assaying quality for bankable feasibility studies, in AusIMM, eds., The resource database towards 2000: Australasian Institute of Mining and Metallurgy, AusIMM Illawara branch, Wollongong, p. 69-79.
25. Sinclair, A.J., and Bentzen, A., 1998, Evaluation of errors in paired analytical data by a linear model: Exploration and Mining Geology, v. 7, p. 167-173.
26. Sinclair, A.J., and Blackwell, G.H., 2002, Applied mineral inventory estimation: Cambridge University Press, 381 p.
27. Sketchley, D.A., 1998, Gold deposits: Establishing sampling protocols and monitoring quality control: Exploration and Mining Geology, v. 7, p. 129-138.
28. Stanley, C.R., 2006, On the special application of Thomp-son-Howarth error analysis to geochemical variables exhibiting a nugget effect: Geochemistry: Exploration, Environment, Analysis, v. 6, p. 357-368.
29. Stanley, C.R., and Lawie, D., 2007a, Average relative error in geochemical determinations: Clarification, calculation, and a plea for consistency: Exploration and Mining Geology, v. 16, p. 265-274.
30. Stanley, C.R., and Lawie, D., 2007b, Thompson-Howarth error analysis: Unbiased alternatives to the large-sample method for assessing non-normally distributed measurement error in geochemical samples: Geochemistry: Exploration, Environment, Analysis, v. 7, p. 1-10.
31. Taylor, J.K., 1987, Quality assurance of chemical measurements: Michigan, Lewis Publishers, 135 p.
32. Thompson, M., and Howarth, R., 1973, The rapid estimation and control of precision by duplicate determinations: The Analyst, v. 98, p. 153-160. Thompson, M., and Howarth, R., 1976: Duplicate analysis in geochemical practice, Part 1: Theoretical approach and estimation of analytical reproducibility: The Analyst, v. 101, p. 690-698.
33. Thompson, M., and Howarth, R., 1978, A new approach to the estimation of analytical precision: Journal of Geochemical Exploration, v. 9, p. 23-30.
34. Valtée, M., David, M., Dagbert, M., and Desrochers, C, 1992, Guide to the evaluation of gold deposits: Geological Society of CIM, Special Volume 45,299 p.