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Dossier Public 2026

Open File:  2026
Previous OF publication(s):  
Province / Territory:  Ontario
Funding Source:  Federal and Provincial
Year of Collection:  1987

Survey Type:  Regional Lake Survey
# Lake sites:  367
# Stream sites:  0
Survey Area:  3288 km²
NTS Sheet(s):  042D, 042E, 052A, 052B, 052H

The regional lake sediment and water survey of four areas in northern Ontario (NTS 42D, 42E, 52A, 52B, 52H) was conducted during the summer of 1987.

This report presents analytical and statistical data for 47 variables in lake sediments from 367 sample sites, collected at an average density of one sample per 9.0 km². This report includes values for uranium, fluoride, pH and alkalinity in waters.

location map for Open File 2026
legend to accompany location map for Open File

Analytical Data

Sediments
variable method detection limit year of analysis
Antimony HY-AAS 0.2 ppm 1987
Antimony INAA 0.1 ppm 1987
Arsenic HY-AAS 1 ppm 1987
Arsenic INAA 0.5 ppm 1987
Barium INAA 50 ppm 1987
Bromine INAA 0.5 ppm 1987
Cadmium AAS 0.2 ppm 1987
Cerium INAA 5 ppm 1987
Cesium INAA 0.5 ppm 1987
Chromium AAS 1 ppm 1987
Chromium INAA 20 ppm 1987
Cobalt AAS 2 ppm 1987
Cobalt INAA 5 ppm 1987
Copper AAS 2 ppm 1987
Europium INAA 1 ppm 1987
Fluorine AAS 20 ppm 1987
Gold INAA 2 ppb 1987
Hafnium INAA 1 ppm 1987
Iron AAS 0.02 pct 1987
Iron INAA 0.2 pct 1987
Lanthanum INAA 2 ppm 1987
Lead AAS 2 ppm 1987
Loss-on-ignition GRAV 1 pct 1987
Lutetium INAA 0.2 ppm 1987
Magnesium AAS 1 ppm 1987
Manganese AAS 5 ppm 1987
Mercury CV-AAS 10 ppb 1987
Molybdenum AAS 2 ppm 1987
Molybdenum INAA 1 ppm 1987
Nickel AAS 2 ppm 1987
Nickel INAA 10 ppm 1987
Palladium FA-ICP 2 ppb 1987
Platinum FA-ICP 2 ppb 1987
Rubidium INAA 5 ppm 1987
Samarium INAA 0.1 ppm 1987
Sample Weight 0.01 gms 1987
Scandium INAA 0.2 ppm 1987
Silver AAS 0.2 ppm 1987
Sodium INAA 0.02 pct 1987
Tantalum INAA 0.5 ppm 1987
Terbium INAA 0.5 ppm 1987
Thorium INAA 0.2 ppm 1987
Tungsten COL 2 ppm 1987
Tungsten INAA 1 ppm 1987
Uranium INAA 0.2 ppm 1987
Vanadium AAS 5 ppm 1987
Ytterbium INAA 2 ppm 1987
Zinc AAS 2 ppm 1987
Waters
variable method detection limit year of analysis
Fluoride ISE 20 ppb 1987
Total Alkalinity TIT 1 ppm 1987
Uranium LIF 0.05 ppb 1987
pH GCM 1987

Acknowledgements:

The reconnaissance surveys were undertaken by the Geological Survey of Canada in conjunction with the Ontario Ministry of Northern Development and Mines under the Canada - Ontario Mineral Development Agreement (1985 - 1990).

E.H.W. Hornbrook directed the survey.

P.W.B. Friske coordinated the operational activities of contract and Geological Survey of Canada staff.

Collection:
Contractor and supervisor details for sample collection
Category Responsible Party
Contractor: GSC personnel, Ottawa, Ontario
Supervisor: P.W.B. Friske, S. Cook and M. McCurdy
Preparation:
Contractor and supervisor details for sample preparation
Category Responsible Party
Contractor: Golder Associates, Ottawa, Ontario
Supervisor: J.J. Lynch (GSC)
Analysis:
Contractor and supervisor details for sample preparation
Category Responsible Party
Contractor: Bondar-Clegg & Company Ltd., Ottawa, Ontario Chemex Labs Limited, North Vancouver, British Columbia Acme Analytical Laboratories, Vancouver, British Columbia
Supervisor: J.J. Lynch (GSC)

Other information:

Data for platinum and palladium in lake sediments are included in this report.

Magnesium and chromium in lake sediments by flame atomic absorption spectrometry were determined with a total decomposition of the sample (4-acid digestion) followed by analysis.

Date de modification