Survey Metadata

NGR lake

Northwest Territories


NGR lake sediment survey, NTS 75C, Northwest Territories, 1975

Location map

(requires an Internet connection)

Survey Description

In 1975, lake sediments were collected in North West Territories, southeast of Great Slave Lake.  The data are published in Geological Survey of Canada Open File 324.  Data for 131 sites were not published.

In 2012, samples collected at 2000 sites in 1975 from map sheets 75C (OF 324) and 75F (OF 325) were reanalyzed by ICP-ES/MS and are published in GSC Open File 7232, along with original data from OFs 324 and 325.

This survey was carried out using National Geochemical Reconnaissance (NGR) protocols.

Publication History

Index Publication
1 Geological Survey of Canada (1976). Regional lake sediment geochemical reconnaissance data, Nonacho Belt, east of Great Slave Lake, N.W.T. Geological Survey of Canada, Open File 324. (more)
2 Coker, W.B., Ellwood, D.J., Maurice, Y.T. (1981). National geochemical reconnaissance, Nonacho Lake, Northwest Territories (75C, F and K). Geological Survey of Canada, Open File 741, 19 pages. (more)
3 Maurice, Y.T. (1984). Interpretation of data from Nonacho Lake - East Arm of Great Slave Lake Region, District of MacKenzie. Geological Survey of Canada, Paper 84-12. (more)
4 McCurdy, M.W., McNeil, R.J., Abramovitch, Y.E., Day, S.J.A. (2012). Regional lake sediment geochemical data, Nonacho Basin – East Arm of Great Slave Lake region, Northwest Territories (NTS 75-C and 75-F). Geological Survey of Canada, Open File 7232, 12 p. (more)

Project History

Index Year Project
1 1975-1977 Nonacho Belt lake sediment and water surveys, 1975-1976 (more)
2 2009-2012 NGR Reanalysis Project, 2009-2012. (more)

Downloadable Files

Index Description Size (bytes)
GSC Open File 324 digital data ( FileID=1123 download)
The data are packaged as a single zip file, compatible with modern operating systems.
Introductory text for GSC Open File 324 ( FileID=415 download)
This PDF file contains the introductory text for GSC Open File 324.  It was scanned from the original document.  The data are not included in this file.
GAS file archive ( FileID=648 download)
This file is an archive of geochemical data stored in the Geochemical Analysis System (GAS) format.  The ZIP file contains a readme file, the data and a user manual.
GAS file archive list of contents ( FileID=649 download)
A PDF file listing the files contained in “”.  The file also lists related publications and if a survey for the data has been created in The Canadian Database of Geochemical Surveys.
Diskette to accompany GSC Open File 324 ( FileID=47 download)
WARNING: the data on the diskette may have been packaged as a 16 bit self-extracting executable file, which is incompatible with 64 bit Windows computers.

Geographic Extent

Minimum Latitude Maximum Latitude Minimum Longitude Maximum Longitude
60° 61° -110° -108°

The geographic extent of the survey is defined by the following polygons:

  • Covers NTS 75C in the North West Territories.


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