|
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 stream water samples were analyzed for trace and major elements in 103A. 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. |
 |
| Analytical Data |
ICPMS
Sediments |
| 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
Sediments |
| 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 |
| Waters |
| pH |
|
|
GCE |
| Uranium |
0.05 |
ppb |
LIF |
| Fluoride |
20 |
ppb |
ION |
| Sulphate |
1 |
ppm |
TURB | |
Trace and Major Elements
Waters |
| 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 | |
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Acknowledgements
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 | | |
