Survey Metadata

NGR lake

British Columbia


BC RGS lake sediment and water survey, NTS 93K/9, 10, 15, 16, northern Interior Plateau, British Columbia, 1995.

Location map

(requires an Internet connection)

Survey Description

Helicopter-supported lake sediment and water sample collection was carried out during October 4-9, 1995 in the Pinchi Lake area.  Samples were collected at each site using a float-equipped Bell 206 helicopter.  A total of 438 sediment and water samples were collected from 413 sites at an average site density of 1 site per 8.7 km2.

Sediments were sampled using a Hornbrook-type torpedo sampler and samples placed in large Kraft paper bags.  Some departures from standard national Geochemical Reconnaissance (NGR) sampling strategies were incorporated particularly pertaining to overall site density and the number of sites sampled in each lake.  First, every lake in the survey area was sampled rather than sampling only a selection of lakes at a fixed density.  Secondly, centre-lake sediment samples were collected following standard NGR procedure, but sediment from the centres of all major known or inferred sub-basins was also collected.

The data are published in BC Open File 1996-15/GSC Open File 3305.

An additional 250 mL lake water sample was also collected at every second site for more extensive multi-element ICP-MS analysis.  A total of 217 sites were sampled; data will be released at a later date.

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

Sampling Procedure

Lake water samples were collected in 250 mL Nalgene bottles using a custom-designed sampling apparatus.  Waters were sampled from approximately 15 cm below the lake surface and precautions were taken to minimize suspended solids.

Publication History

Index Publication
1 Cook, S.J., Jackaman, W., McCurdy, M.W., Day, S.J., Friske, P.W. (1997). Regional lake sediment and water geochemistry of part of the Fort Fraser map area, British Columbia (NTS 93K/9, 10, 15 and 16). Geological Survey of Canada, Open File 3305/British Columbia Geological Survey Open File 1996-15. (more)
2 Jackaman, W. (2008). Regional lake sediment and water geochemical data, northernFraser Basin, centralBritish Columbia (parts ofNTS 93G, H, J, K, N & O). Geoscience BC, Report 2008-5. (more)

Project History

Index Year Project
1 1993-1996 Interior Plateau, Project/Nechako NATMAP Project, British Columbia (more)

Downloadable Files

Index Description Size (bytes)
Diskette to accompany GSC Open File 3305 ( FileID=294 download)
This ZIP file contains a copy of the data diskette originally released with GSC Open File 3305.

Geographic Extent

Minimum Latitude Maximum Latitude Minimum Longitude Maximum Longitude
54.5° 55° -125° -124°

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

  • Covers NTS 93K/9 (Pinchi Lake), 93K/10 (Stuart Lake), 93K/15 (Inzana Lake) and 93K/16 (Tezzeron Creek) in the northern Interior Plateau of British Columbia.  It is bounded by latitudes 54.5° and 55° N and longitudes 124° and 125° W.


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