Determining the appropriate sample size for a representative sample for assay purposes at the 66% confidence level.
Determining a representative sample size for assay purposes (pdf)
DownloadHow to convert gold recoveries in panned samples to meaningful numerical assay grades (in ppm and down into ppb levels).
Converting gold grains in the panning dish to gold assay values (ppm & ppb) (docx)
DownloadAn essential table for exploration purposes detailing average crustal abundances, enrichment factors, geochemical anomaly threshold assay values, and approximate metal prices for some 20 of the commonest ore types.
Metal abundance, grade & enrichment factors 2010 Table (pdf)
DownloadA short essay extolling the incredible usefulness and versatility of the humble gold pan in mineral exploration
IN PRAISE OF THE GOLD PAN 2016 2 (pdf)
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