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Ministry of Energy Mines and Responsible for Core Review



NTS 93K - Fort Fraser


/ RGS 57 / GSC OF 1766 / GBC 2008-5 / GBC 2009-11 / GBC 2009-14 /
GBC R2015-09

GSC Open File 1766/BC RGS 57 includes analytical and statistical data compiled from a reconnaissance-scale geochemical survey conducted in the Fort Fraser (NTS 93K) map sheet during 2002.  Stream sediment and water samples were collected from 795 sites covering over 10,500 square kilometers at a density of one sample per 13.2 km2 (Figure 1).

Survey results include 49 variables in stream sediments, fluorine and loss-on-ignition in sediments, and pH, uranium, fluoride and conductivity in stream waters.  In addition, 186 stream water samples were analyzed for trace and major elements.


There are over sixty known mineral occurrences in the Fort Fraser area including the Endako molybdenum mine.  This very accessible region for exploration has potential for volcanogenic massive sulphide (VMS) mineralization mesothermal vein (Au), epithermal vein (Au, Ag) and Cu-Mo porphyry mineralization.  The area is underlain by volcanic and sedimentary rocks of the Mesozoic Cache Creek, Takla and Hazelton Groups and by Jurassic-Cretaceous quartz monzonite to granodiorite plutons.  A NATMAP project over the area carried out by the BC Geological Survey and the Geological survey of Canada between 1995 and 1999 included geological mapping, till geochemical and lake sediment surveys.


Geoscience BC Report 2008-5 is part of the QUEST project, which was funded by Geoscience BC in partnership with the Northern Development Initiative Trust, and covers a 46,000 square kilometre area extending from Williams Lake to north west of Mackenzie. This digital release includes results of the 2007 in-fill lake sediment and water survey as well as original data and new inductively coupled plasma mass spectrometry (ICPMS) results from a 1995 survey previously conducted in the adjacent Stuart Lake area.


Geoscience BC Report 2009-11 is part of the QUEST-West project, which covers over 40,000 kilometers from Vanderhoof and Fort St. James to Terrace and Kitimat. Geoscience BC in partnership with the Northern Development Initiative Trust and the Regional District of Bulkley-Nechako funded an infill drainage sediment and water survey in 2008 conducted in central British Columbia. This digital release includes results of the 2008 infill survey and parts of this package incorporate data from a number of previous lake and stream based surveys completed in the study area as well as the new reanalysis data that were released in January 2009 as part of the QUEST-West Project.


Geoscience BC Report 2009-14 is an investigation using SiroSOM for the Analysis of QUEST Stream-Sediment and Lake-Sediment Geochemical Data on all NTS sheets for 93 and 94 A, B, C and D. 


Geoscience BC Report 2015-09 is a report on the Geochemical Reanalysis of Archived Till Samples, TREK Project, Interior Plateau, central BC (parts of NTS 093C, 093B, 093F & 093K)." Short for Targeting Resources through Exploration and Knowledge, TREK is Geoscience BC's current regional project focused on BC's Interior Plateau, an underexplored area that is considered highly prospective for mineral resources.

Figure 1

Analytical Data
Element Detection Limit Units
Aluminum 0.01 %
Antimony 0.02 ppm
Arsenic 0.1 ppm
Barium 0.5 ppm
Bismuth 0.02 ppm
Cadmium 0.01 ppm
Calcium 0.01 %
Chromium 0.5 ppm
Cobalt 0.1 ppm
Copper 0.01 ppm
Gallium 0.2 ppm
Gold 0.2 ppb
Iron 0.01 %
Lanthanum 0.5 ppm
Lead 0.01 ppm
Magnesium 0.01 %
Manganese 1 ppm
Mercury 5 ppb
Molybdenum 0.01 ppm
Nickel 0.1 ppm
Phosphorus 0.001 %
Potassium 0.01 %
Scandium 0.1 ppm
Selenium 0.1 ppm
Silver 2 ppb
Sodium 0.001 %
Strontium 0.5 ppm
Sulphur 0.02 %
Tellurium 0.02 ppm
Thallium 0.02 ppm
Thorium 0.1 ppm
Titanium 0.001 %
Tungsten 0.2 ppm
Uranium 0.1 ppm
Vanadium 2 ppm
Zinc 0.1 ppm
INAA plus F and LOI
Element Detection Limit Units  Methods
Antimony 0.1 ppm INAA
Arsenic 0.5 ppm INAA
Barium 50 ppm INAA
Bromine 0.5 ppm INAA
Cerium 5 ppm INAA
Cesium 0.5 ppm INAA
Chromium 20 ppm INAA
Cobalt 5 ppm INAA
Europium 1 ppm INAA
Gold 2 ppb INAA
Hafnium 1 ppm INAA
Iron 0.2 % INAA
Lanthanum 2 ppm INAA
Lutetium 0.2 ppm INAA
Rubidium 5 ppm INAA
Samarium 0.1 ppm INAA
Scandium 0.2 ppm INAA
Sodium 0.02 % INAA
Tantalum 0.5 ppm INAA
Terbium 0.5 ppm INAA
Thorium 0.2 ppm INAA
Tungsten 1 ppm INAA
Uranium 0.2 ppm INAA
Ytterbium 2 ppm INAA
Sample Weight 0.01 gm GRAV
Fluorine 10 ppm ION
Loss on Ignition 0.1 % FUSION
pH     GCE
Uranium 0.05 ppb LIF
Fluoride 20 ppb ION
Sulphate 1 ppm TURB
Trace and Major Elements
Element Detection Limit Units  Methods
Aluminium 2 ppb ICPMS
Antimony 0.01 ppb ICPMS
Arsenic 0.1 ppb ICPMS
Barium 0.2 ppb ICPMS
Beryllium 0.005 ppb ICPMS
Boron 0.5 ppb ICPMS
Cerium 0.01 ppb ICPMS
Cesium 0.01 ppb ICPMS
Chromium 0.1 ppb ICPMS
Cobalt 0.05 ppb ICPMS
Copper 0.1 ppb ICPMS
Dysprosium 0.005 ppb ICPMS
Erbium 0.005 ppb ICPMS
Gadolinium 0.005 ppb ICPMS
Lanthanum 0.01 ppb ICPMS
Lead 0.01 ppb ICPMS
Lithium 0.005 ppb ICPMS
Manganese 0.1 ppb ICPMS
Molybdenum 0.05 ppb ICPMS
Neodymium 0.005 ppb ICPMS
Nickel 0.2 ppb ICPMS
Praseodymium 0.005 ppb ICPMS
Rubidium 0.05 ppb ICPMS
Samarium 0.005 ppb ICPMS
Strontium 0.5 ppb ICPMS
Titanium 0.5 ppb ICPMS
Uranium 0.005 ppb ICPMS
Vanadium 0.1 ppb ICPMS
Ytterbium 0.005 ppb ICPMS
Yttrium 0.01 ppb ICPMS
Zinc 0.5 ppb ICPMS
Calcium 0.02 ppm ICPES
Iron 0.005 ppm ICPES
Magnesium 0.005 ppm ICPES
Potassium 0.05 ppm ICPES
Silicon 0.02 ppm ICPES
Sodium 0.05 ppm ICPES
Sulphur 0.05 ppm ICPES


In collaboration with the Geological Survey of Canada, the Fort Fraser survey was designed and managed by the BC Geological Survey Branch. The BC Ministry of Energy and Mines and Targeted Geoscience Initiative (TGI) provided funding.

P.W.B. Friske and R.E.W. Lett directed the survey and coordinated the activities of the various contractors, BC Geological Survey Branch (BCGS) staff and Geological Survey of Canada (GSC) staff. Contracts were awarded to the following companies for sample collection, preparation, and analysis, and were managed by the listed BCGS and GSC staff:



McElhanney Consulting Services Ltd., Vancouver, BC
R.E.W. Lett (BCGS)


ACME Analytical Laboratories, Ltd., Vancouver, BC
R.E.W. Lett (BCGS) and P.W.B. Friske (GSC)


ACME Analytical Laboratories, Ltd., Vancouver, BC
R.E.W. Lett (BCGS) and P.W.B. Friske (GSC)

Becquerel Laboratories, Ltd., Mississauga, Ontario
P.W.B. Friske (GSC)

CanTech Laboratories, Inc., Calgary, Alberta
P.W.B. Friske (GSC) and R.E.W. Lett (BCGS)

GSC Analytical Method Development, Ottawa, Ontario
G.E.M. Hall (GSC) and J.E. Vaive (GSC)