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Ministry of Energy Mines and Responsible for Core Review



NTS 104I - Cry Lake / BC RGS 44


GBC 2011-2 / GBC 2012-2 / GBC R2012-7

The Cry Lake (NTS 104I) reconnaissance-scale stream sediment and water survey was completed in 1995 and the resulting field and analytical data were released in 1996.  A total of 1228 sediment and 1213 water samples were collected from 1159 sample sites.


Geoscience BC Report 2011-2 reports on the Northern BC Reanalysis Project -a continuation of a series of large-scale reanalysis initiatives that have been sponsored by Geoscience BC since 2007.  Recognized as a cost-effective means of updating information collected during older government funded regional geochemical surveys, these programs have significantly improved the BC geochemical database by providing a wide range of new analytical information at improved detection levels plus greater data compatibility with analytical methods currently being employed.  Digital data file includes new ICP-MS analytical results for a total of 7,651 stream and lake sediment samples. 


Geoscience BC Report 2012-2 presents the results of the QUEST-Northwest Block 1 airborne magnetic survey, located between the communities of Dease Lake and Iskut.  This dataset was collected by Aeroquest Airborne over the summer and fall of 2011.  The survey was flown with a line spacing of 250 m., and the total survey coverage is 27,012 line-km. 


Geoscience BC Report 2012-7 reports on new infill stream based geochemical surveys plus the reanalysis of over 2400 sample pulps from government funded surveys that were originally completed in NTS map sheets 104F, G and K during the mid-1980s. Geoscience BC Report 2012-07 includes results of the 2011 infill sampling programs. Data generated by the reanalysis work was released in April 2012 (GBC Reports 2011-05 and 2011-06). 

Analytical Data 
Sediments Sediments
element method detection limit element method detection limit
Zinc AAS 2 ppm Antimony AAS-H 0.2 ppm
Copper AAS 2 ppm Iron AAS 0.02%
Lead AAS 2 ppm Molybdenum AAS 1 ppm
Nickel AAS 2 ppm Vanadium AAS 5 ppm
Cobalt AAS 2 ppm
Silver AAS 0.2 ppm
Manganese AAS 5 ppm Waters
Fluorine ION 40 ppm element method detection limit
Cadmium AAS 0.2 ppm pH GCE 0.1
Mercury AAS-F 10 ppb Uranium LIF 0.05 ppb
Arsenic AAS-H 0.5 ppm Fluoride ION 20 ppb
Bismuth AAS-H 0.2 ppm Sulphate TURB 1 ppm
INAA Data (thermal)
element detection limit element detection limit element detection limit
Gold 2 ppb Iron 0.20 % Tellurium 10 ppm
Antimony 0.1 ppm Lanthanum 2 ppm Terbium 0.5 ppm
Arsenic 0.5 ppm Lutetium 0.2 ppm Thorium 0.2 ppm
Barium 50 ppm Molybdenum 1 ppm Tin 100 ppm
Bromine  0.5 ppm Nickel 10 ppm Titanium 100 ppm
Cadmium 5 ppm Rubidium 5 ppm Tungsten 1 ppm
Cerium 5 ppm Samarium 0.1 ppm Uranium 0.2 ppm
Cesium 0.5 ppm Scandium 0.2 ppm Ytterbium 2 ppm
Chromium 20 ppm Selenium 5 ppm Zinc 100 ppm
Cobalt 5 ppm Silver 2 ppm Zirconium 200 ppm
Europium 1 ppm Sodium 1 %
Hafnium 1 ppm Tantalum 0.5 ppm


Element Detection Limit Units
Aluminum Al 0.01 %
Antimony Sb 0.02 ppm
Arsenic As 0.1 ppm
Boron B 20 ppm
Barium Ba 0.5 ppm
Bismuth Bi 0.02 ppm
Cadmium Cd 0.01 ppm
Calcium Ca 0.01 %
Chromium Cr 0.5 ppm
Cobalt Co 0.1 ppm
Copper Cu 0.01 ppm
Gallium Ga 0.1 ppm
Gold Au 0.2 ppb
Iron Fe 0.01 %
Lanthanum La 0.5 ppm
Lead Pb 0.01 ppm
Magnesium Mg 0.01 %
Manganese Mn 1 ppm
Mercury Hg 5 ppb
Molybdenum Mo 0.01 ppm
Nickel Ni 0.1 ppm
Phosphorus P 0.001 %
Potassium K 0.01 %
Scandium Sc 0.1 ppm
Selenium Se 0.1 ppm
Silver Ag 2 ppb
Sodium Na 0.001 %
Strontium Sr 0.5 ppm
Sulphur S 0.02 %
Tellurium Te 0.02 ppm
Thallium Tl 0.02 ppm
Thorium Th 0.1 ppm
Titanium Ti 0.001 %
Tungsten W 0.05 ppm
Uranium U 0.05 ppm
Vanadium V 2 ppm
Zinc Zn 0.1 ppm
Beryllium Be 0.1 ppm
Cerium Ce 0.1 ppm
Cesium Cs 0.02 ppm
Germanium Ge 0.1 ppm
Hafnium Hf 0.02 ppm
Indium In 0.02 ppm
Lithium Li 0.1 ppm
Niobium Nb 0.02 ppm
Rubidium Rb 0.1 ppm
Rhenium Re 1 ppb
Tin Sn 0.1 ppm
Tantalum Ta 0.05 ppm
Yttrium Y 0.01 ppm
Zirconium Zr 0.1 ppm
Platinum Pl 2 ppb
Palladium Pd 10 ppb


The 1995 survey was managed and funded by the British Columbia Ministry of Energy, Mines and Petroleum Resources (MEMPR) as part of the Regional Geochemical Survey Program.


W. Jackaman and R.E. Lett coordinated the operational activities of contract and MEMPR staff. W. Jackaman monitored the field program and coordinated the production of the Open File.


Contracts were awarded to the following companies for sample collection, preparation and analysis. 


COLLECTION:  McElhanney Engineering Services Ltd., Vancouver, B.C.
PREPARATION:  Rossbacher Laboratories Ltd., Burnaby, B.C.
ANALYSIS: CanTech Laboratories Ltd., Calgary, Alta. (Sediments and Waters)
Activation Laboratories Ltd., Ancaster, Ont. (Sediments)