Survey Metadata

NGR stream

British Columbia


BC RGS stream sediment and water survey, NTS 104B, northwestern British Columbia, 1987.

Location map

(requires an Internet connection)

External Links

Index Link
BC EMPR Regional Geochemistry ( LinkID=681 more)
Metadata page for BC Regional Geochemical Survey RGS 18 (NTS 104B). Includes links to related data.

Survey Description

During the summer of 1987, helicopter (97%) and truck (3%) supported stream sediment and water collection was carried out in the Iskut River area, northwestern British Columbia.  Samples were collected from 661 sites at an average density of one site per 12.5 km2 throughout the 8,200 km2 survey area.  Duplicate samples were routinely collected from a site once in each analytical block of twenty samples.  The data are published in British Columbia Ministry of Energy and Petroleum Resources Regional Geochemical Survey RGS 18/Geological Survey of Canada Open File 1645.

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

Sampling Procedure

Stream sediment samples ideally comprise 2 – 4 kg of sand size and finer inorganic material collected from low energy sites within the stream.  Large Kraft paper sample bags were used to ensure sufficient fines were collected.  Stream waters were taken using 250 mL Nalgene plastic bottles flushed out with water from the stream prior to collection of the sample.

Publication History

Index Publication
1 Matysek, P.F., Day, S.J., Gravel, J.L., Jackaman, W. (1988). Iskut River, British Columbia. Geological Survey of Canada, Open File 1645/British Columbia Regional Geochemical Survey RGS 18. (more)
2 Lett, R., Jackaman, W. (2003). Re-analysis of regional stream sediment survey samples from the Iskut River area (NTS 104B and G). British Columbia Ministry of Energy and Mines, Mining and Minerals Division, GeoFile 2003-20. (more)

Project History

Index Year Project
1 1987-1988 Northwestern British Columbia stream sediment and water surveys carried out in 1987 (more)
2 2002-2008 British Columbia ICP-MS and ICP-ES reanalysis project for stream sediments, 2002-2008. (more)

Downloadable Files

Index Description Size (bytes)
GSC Open File 1645 digital data ( FileID=1217 download)
The data are packaged as a single zip file, compatible with modern operating systems.
Introductory text for GSC Open File 1645 ( FileID=534 download)
This PDF file contains the introductory text for GSC Open File 1645.  It was scanned from the original document.  The data are not included in this file.
Diskette to accompany GSC Open File 1645 ( FileID=161 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
56.17° 57° -131.88° -130°

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

  • Covers part of NTS 104B (Iskut River) in northwestern British Columbia.  It is bounded to the southwest by the Alaska border and Tongass National Forest.


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