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GEOREF RECORD

Gold analysis; fire assaying and alternative methods

Eric L. Hoffman, John R. Clark and James R. Yeager
Gold analysis; fire assaying and alternative methods (in Quality assurance, continuous quality improvement and standards in mineral resource estimation, Marcel A. Vallee (editor) and Alastair J. Sinclair (editor))
Exploration and Mining Geology (April 1998) 7 (1-2): 155-160

Abstract

This paper describes fire assaying and 'high tech' alternatives for gold analysis, including the advantages and disadvantages of each method. These 'high tech' methods include instru neutron activation, aqua-regia digestion/atomic absorption, graphite furnace-atomic absorption or ICPMS and combinations of cyanidation with some of these methods. Fire assay remains the stalwart among analytical methods for gold but, even with its multiple ana finishes, is not fool-proof for 100% recovery of the gold present. Consumers of assays should not blindly trust the assay results without consideration of quality control data. Laboratories can and do make mistakes. Some of these can be easily discovered by due diligence. All these measures should ensure that gold analysis values from successive campaigns and from different laboratories meet acceptable levels of accuracy and precision, and can be correlated together, particularly when they occur in neighbouring holes. This is essential just as much for prospect evaluation as for project feasibility.


ISSN: 0964-1823
Serial Title: Exploration and Mining Geology
Serial Volume: 7
Serial Issue: 1-2
Title: Gold analysis; fire assaying and alternative methods
Title: Quality assurance, continuous quality improvement and standards in mineral resource estimation
Author(s): Hoffman, Eric L.Clark, John R.Yeager, James R.
Author(s): Vallee, Marcel A.editor
Author(s): Sinclair, Alastair J.editor
Affiliation: Activation Laboratories, Ancaster, ON, Canada
Affiliation: Geoconseil Marcel Vallee, Sainte-Foy, QC, Canada
Pages: 155-160
Published: 199804
Text Language: English
Publisher: Canadian Institute of Mining, Metallurgy and Petroleum, Montreal, QC, Canada
Meeting name: Geological Society of CIM symposium on Quality control of resource estimation; an ISO perspective
Meeting location: Montreal, QC, CAN, Canada
Meeting date: 19981998
References: 9
Accession Number: 2000-074374
Categories: Economic geology, geology of ore depositsGeneral geochemistry
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables
Secondary Affiliation: University of British Columbia, CAN, CanadaEnzyme Laboratories, USA, United States
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200023
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