Survey Metadata


British Columbia


Biogeochemical survey, NTS 93A/12, QR deposit, central British Columbia, 1988

Location map

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Survey Description

Douglas fir tree tops were collected from 94 sites within a six square kilometre area approximately 140 km southeast of Prince George in central British Columbia.  The study area was centred on the Main Zone of gold mineralization of the poorly exposed QR (Quesnel River) deposit.  The sampling was carried out during the morning of April 27, 1988.  In total 103 samples were collected, including a few from distant areas to determine background levels of elements.  An interpretation of the work can be found in Journal of Geochemical Exploration, v.34.

Sampling Procedure

Samples were collected at intervals of approximately 200 m (100 m on one line) along 12 lines 200 m apart.  The length of line varied from 500 to 2300 m.  A helicopter was used to obtain the samples, with the sampler, who was harnessed in, leaning out over the skid and snipping off the top 0.5 m of the tree.  

Publication History

Index Publication
1 Dunn, C.E. (1989). Airborne and surface biogeochemical surveys for precious metals in the Cordillera. Cordilleran Geology and Exploration Roundup, Geological Survey of Canada, Cordilleran and Pacific Geoscience Division, Program and Abstracts. (more)
2 Dunn, C.E., Scagel, R.K. (1989). Tree-top sampling from a helicopter – a new approach to gold exploration. Journal of Geochemical Exploration, v. 34 (3), p. 255-270. (more)

Project History

Index Year Project
1 1988-1989 QR gold deposit, central British Columbia vegetation survey, 1988 (more)

Geographic Extent

Minimum Latitude Maximum Latitude Minimum Longitude Maximum Longitude
52.6524° 52.6779° -121.8165° -121.7723°

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

  • Covers part of NTS 93A/12 (Hydraulic) north and south of the Quesnel River in central British Columbia.  It is located approximately 7 km west of the town of Quesnel Forks and approximately 2 km west of the junction of the Quesnel River and Maud Creek.


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