The Lardeau (NTS 82K) reconnaissance-scale stream sediment and water survey was completed in 1977 and the resulting field and analytical data were released in 1978. A total of 1297 sediment and 1295 water samples were collected from 1225 sample sites.
As part of the RGS Archive Program, 1236 archived sediment pulps were re-analyzed by epi-thermal INAA and this new data along with original survey results were published in 1991.
British Columbia Geological Survey Open File 1990-11 presents analytical results for gold and 28 other elements from stream samples collected in the Purcell Wilderness Conservancy Study Area in southeastern British Columba.
In 2012 Geoscience BC published ICP-MS results for stream sediment samples collected during the original 1977 Lardeau RGS program in southeast BC.
Geoscience BC Report 2013-04 presents ICP-MS results for stream sediment samples collected during the original 1977 Lardeau RGS program. The Lardeau regional geochemical survey was conducted in 1977 and included the collection of 1297 stream sediment samples. In co-operation with the BC Geological Survey and Natural Resources Canada, samples saved from the survey work were retrieved from storage facilities in Ottawa. A total of 1435 drainage-sediment and quality-control samples were subsequently delivered to Acme Analytical Laboratories Ltd. (Vancouver, BC) and analyzed by an ultra-trace aqua-regia digestion (0.5 g) ICP-MS technique for 53 elements. Due to a deficiency of available material, one sample was not included in the reanalysis work.