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Ministry of Energy Mines and Responsible for Core Review



NTS 93D/103A - Bella Coola - Larado Sound

BC RGS 56 / GSC OF 4414 / BCGS GF2006-10 / GBC 2009-14 / BCGS GF2011-7 /

The Bella Coola (NTS 93D/103A) reconnaissance-scale stream sediment and water survey was completed in 2001 and the resulting field and analytical data were released in 2002.  A total of 1180 stream sediment and water samples were collected from 1003 sample sites over 12,000 square kilometres at an average density of 1 site every 12 sq. km.  Sediment samples were analysed by INAA and aqua regia-ICPMS for base and precious metals, pathfinder and rare earth elements.  Water samples were analysed for pH, uranium and fluoride. In addition, 39 and 194 stream water samples were analyzed for trace and major elements in 103A and 093D, respectively.  Geology and mineral occurrence sketch.


The Bella Coola area is relatively under explored and has potential for volcanogenic massive sulphide (VMS) mineralization (e.g. Nifty - MINFILE 093D 006), gold-silver veins, and Cu-Mo porphyry deposits. The area is underlain by the Mesozoic Hazelton Group, Coast Complex plutonic rocks and Cretaceous-Tertiary intrusive rocks.


Stream sediment analyses, from several regional geochemical surveys(093D,C,E), carried out by the BC Geological Survey in the Bella Coola area have been compiled into GeoFile 2006-10 for convenience and to accompany recent geological map product releases from the Geological Survey of Canada and the BC Geological Survey.


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. 


In 2009, moss samples were analysed by INAA and AAS.  See BC Geological Survey GeoFile 2011-7 for results.

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 Bella Coola survey was designed and managed by the B.C. Geological Survey Branch. The survey was funded by the Targeted Geoscience Initiative (TGI) and the British Columbia Ministry of Energy and Mines.


P.W.B. Friske and W. Jackaman directed the survey and coordinated the activities of the various contractors, B.C. 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:


COLLECTION:  McElhanney Consulting Services Ltd., Vancouver, B.C.
W. Jackaman (BCGS)
PREPARATION:  Bondar Clegg, North Vancouver, B.C.
R.E.W. Lett (BCGS) and P.W.B. Friske (GSC)
ANALYSIS: ACME Analytical Laboratories, Ltd., Vancouver, B.C.
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)

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