Geoscience BC Report 2013-09
Nelson (NTS 082F) Sample Reanalysis (ICP-MS)
by W. Jackaman (Noble Exploration Services Ltd.)
Geoscience BC Report 2013-09 presents ICP-MS results for stream sediment samples collected during the original 1977 Nelson RGS program. Results from the 1977 Lardeau RGS program were released in January 2013 as Geoscience BC Report 2013-04. The Nelson regional geochemical survey was conducted in 1977 and included the collection of 1394 stream sediment samples. In co-operation with the BC Geological Survey (BCGS) and Natural Resources Canada (NRCan), samples saved from the survey work were retrieved from storage facilities in Ottawa. A total of 1554 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
ICP-MS results have been provided in the Microsoft® Excel (XLS) file GBC REPORT 2013-09.XLS. The data have been carefully checked for analytical quality using blind duplicate samples and control reference material. Reanalysis data determined to be complete and accurate were merged with sample site location information acquired from the original survey publication. Routine comparison of the original determinations with the ICP-MS analyses for elements such as copper, lead, nickel and zinc, identified inconsistencies in some samples. As a result, ICP-MS data for 382 samples have been removed from the data set until further investigations can be completed.
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