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 0405

Open File:  0405
Previous OF publication(s):  
Province / Territory:  Ontario
Funding Source:  Federal
Year of Collection:  1976

Survey Type:  Regional Lake Survey
# Lake sites:  580
# Stream sites:  0
Survey Area:  13400 km²
NTS Sheet(s):  031C

The regional lake survey for central Ontario (NTS 31C) was conducted during the summer of 1976.

This report presents analytical and statistical data for 13 variables in lake sediments from 580 sample sites collected at an average density of one sample per 23.1 km².

Analytical Data

variablemethoddetection limityear of analysis
ArsenicCOL1 ppm1976
CobaltAAS2 ppm1976
CopperAAS2 ppm1976
IronAAS0.02 pct1976
LeadAAS2 ppm1976
Loss-on-ignitionGRAV1 pct1976
ManganeseAAS5 ppm1976
MercuryCV-AAS10 ppb1976
MolybdenumAAS2 ppm1976
NickelAAS2 ppm1976
SilverAAS0.2 ppm1976
UraniumNADNC0.2 ppm1976
ZincAAS2 ppm1976


The Geological Survey of Canada provided financial support ('A' Base Funds).

E.H.W. Hornbrook directed Geological Survey of Canada activities.

Contracts for field work, sample preparation and sample analysis were let, supervised and monitored by the Geochemistry Section, Geological Survey of Canada.

Contractor and supervisor details for sample collection
CategoryResponsible Party
Contractor:GSC personnel
Supervisor:E.H.W. Hornbrook
Contractor and supervisor details for sample preparation
CategoryResponsible Party
Contractor:Golder Associates, Ottawa, Ontario
Supervisor:J.J. Lynch
Contractor and supervisor details for sample preparation
CategoryResponsible Party
Contractor:Chemex Labs Limited, Vancouver, British Columbia Atomic Energy of Canada Limited, Ottawa, Ontario
Supervisor:J.J. Lynch

Other information:

Waters were collected in 1982 and sediment was reanalyzed for additional elements in 1982. Data were released in Open File 899.

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