Ongoing efforts by government-funded agencies to update and maintain the geochemical database established by the British Columbia Regional Geochemical Survey (RGS) and the National Geochemical Reconnaissance (NGR) programs have produced one of the most comprehensive collections of field information and multi-element analytical data in Canada (Jackaman, 2011; Jackaman and Lett, 2013). The database has benefitted from several initiatives including the reanalysis of archived sediment samples by instrumental neutron activation analysis (INAA). In the 1990s, over 20,000 samples from earlier BC RGS and NGR programs were retrieved from archive storage and analyzed by INAA producing previously unavailable data for gold and a range other important metals such as pathfinder and rare earth elements. More recently, Geoscience BC's QUEST-Northwest Project generated new INAA data from samples collected in 1987 during surveys conducted in the Sumdum and Telegraph Creek map areas (Jackaman, 2012).
INAA results have been provided in the Microsoft® Excel (XLS) file GBC REPORT 2013-06.XLS. The data have been carefully checked for analytical quality using blind duplicate samples and control reference material. When determined to be complete and accurate, the reanalysis data were merged with sample site location information acquired from the original survey publication.