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Ministry of Energy Mines and Responsible for Core Review


NTS 82K - Lardeau

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GSC OF 515/NGR 26/GSC OF 2356 /BCGS OF1990-11 / GBC 2013-04

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.

Original Analytical Data 


element method detection limit element method detection limit
Zinc AAS 2 ppm pH GCE 0.1
Copper AAS 2 ppm Uranium LIF 0.05 ppb
Lead AAS 2 ppm Fluoride ION 20 ppb
Nickel AAS 2 ppm
Cobalt AAS 2 ppm
Silver AAS 0.2 ppm
Manganese AAS 5 ppm
Iron AAS 0.02%
Molybdenum AAS 1 ppm
Tin AAS 1 ppm
Tungsten COLOR 1 ppm
Mercury AAS-F 10 ppb
Uranium NADNC 0.5 ppm
INAA Data 
element detection limit element detection limit element detection limit
Gold 2 ppb Hafnium 1 ppm Sodium 0.10%
Antimony 0.1 ppm Iron 0.20% Tantalum 0.5 ppm
Arsenic 0.5 ppm Lanthanum 5 ppm Terbium 0.5 ppm
Barium 100 ppm Lutetium 0.2 ppm Thorium 0.5 ppm
Bromine 0.5 ppm Molybdenum 1 ppm Tungsten 2 ppm
Cerium 10 ppm Nickel 10 ppm Uranium 0.2 ppm
Cesium 0.5 ppm Rubidium 5 ppm Ytterbium 2 ppm
Chromium 5 ppm Samarium 0.5 ppm Zirconium 200 ppm
Cobalt 5 ppm Scandium 0.5 ppm    


The 1977 survey was conducted by the Geological Survey of Canada (GSC) in conjunction with the British Columbia Ministry of Energy, Mines and Petroleum Resources (MEMPR) under the Canada-British Columbia Uranium Reconnaissance Program. 


In 1977 E.H.W. Hornbrook directed GSC activities and N.C. Carter directed MEMPR activities. Contracts were let to the following companies for sample collection, preparation and analysis and were managed by staff of the GSC and MEMPR.


COLLECTION: Stokes Exploration Management Ltd. Vancouver, B.C.
S.B. Ballantyne (GSC) and T.E. Kalnins (MEMPR)
PREPARATION: Golder Associates, Ottawa. Ont.
J.J. Lynch (GSC)

Chemex Laboratories Ltd., Vancouver, B.C. (Sediments and Waters)
Atomic Energy of Canada, Ltd., Ottawa, Ont. (U in Sediments)
J.J. Lynch (GSC) and W.M. Johnson (MEMPR)

Initiated in 1990, the RGS Archive Program was conducted by the MEMPR and was funded in part by the Canada/British Columbia Mineral Development Agreement (1985-1990). P.F. Matysek and W. Jackaman directed the activities of MEMPR staff and managed the following sample preparation and analytical contracts.


PREPARATION Rob Phillips, Ottawa, Ont.
ANALYSIS: Becquerel Laboratories, Mississauga, Ont.