NGR Open Files

Archived information

The database from which the NGR Open File metadata was extracted is unilingual and is not being actively maintained.  It contains information that is not readily available elsewhere.

Open File 1640

Open File:  1640
Previous OF publication(s):  
Province / Territory:  Ontario
Funding Source:  Federal and Provincial
Year of Collection:  1987

Survey Type:  Regional Lake Survey
# Lake sites:  1696
# Stream sites:  
Survey Area:  20900 km²
NTS Sheet(s):  041P, 031M

The regional lake sediment and water survey for central Ontario (NTS 41P and part of 31M) was conducted during the summer of 1987.

This report presents analytical and statistical data for 18 variables in lake sediments from 1,696 sample sites, collected at an average density of one sample per 12.4 km². This report includes values for uranium, fluoride, pH, alkalinity, calcium and magnesium in waters.

location map for Open File 1640
legend to accompany location map for Open File

Analytical Data

variablemethoddetection limityear of analysis
AntimonyHY-AAS0.2 ppm1987
ArsenicHY-AAS1 ppm1987
CadmiumAAS0.2 ppm1987
CobaltAAS2 ppm1987
CopperAAS2 ppm1987
FluorineISE20 ppm1987
GoldFA-NA1 ppb1987
IronAAS0.02 pct1987
LeadAAS2 ppm1987
Loss-on-ignitionGRAV1 pct1987
ManganeseAAS5 ppm1987
MercuryCV-AAS10 ppb1987
MolybdenumAAS2 ppm1987
NickelAAS2 ppm1987
SilverAAS0.2 ppm1987
UraniumNADNC0.5 ppm1987
VanadiumAAS5 ppm1987
ZincAAS2 ppm1987
variablemethoddetection limityear of analysis
CalciumICP0.5 ppm1987
FluorideISE20 ppb1987
MagnesiumICP0.05 ppm1987
Total AlkalinityTIT1 ppm1987
UraniumLIF0.05 ppb1987
pHGCM 1987


The reconnaissance survey was undertaken by the Geological Survey of Canada in conjunction with the Ontario Department of 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.

Contractor and supervisor details for sample collection
CategoryResponsible Party
Contractor:SIAL Geophysique, Montreal, Quebec
Supervisor:E.H.W. Hornbrook, P.W.B. Friske (GSC)
Contractor and supervisor details for sample preparation
CategoryResponsible Party
Contractor:Golder Associates, Ottawa, Ontario
Supervisor:J.J. Lynch (GSC)
Contractor and supervisor details for sample preparation
CategoryResponsible Party
Contractor:Bondar-Clegg & Company Ltd., Ottawa, Ontario Chemex Labs Limited, Vancouver, British Columbia
Supervisor:J.J. Lynch (GSC)

Other information:
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