Survey Metadata

Till, Vegetation

Ontario

1978

Biogeochemical and till sampling, NTS 31F/1, Hopetown, Ontario, 1978-1980.





Location map

(requires an Internet connection)



Survey Description


Leaves of black spruce, balsam fir, juniper, sugar maple, aspen, grasses and their till substrate were sampled at approximately 80 sites near Hopetown, Ontario in 1978, 1979 and 1980.  Sampling was conducted over 0.25 km2 on a grid positioned to include zinc-rich bedrock and its associated dispersal train.  The grid consisted of traverses at about 50 m intervals across the area.  Samples of C-horizon of the soil profile developed on till were collected at about 20 m intervals along the traverses.  At each site, a sample weighing approximately 2 kg was collected from the bottom of a pit (40-70 cm in depth).  Strongly oxidized B-horizon was avoided.  Vegetation samples were taken in conjunction with the till samples.  A description of the study can be found in Canadian Journal of Earth Sciences, v.19.

Data Description:

Paper report.

Quantities Analysed:

<0.002 mm fraction of till analyzed by AAS after an HNO3-HCl digestion for Cd and Zn; Hg by CV-AAS after digestion in an HNO3-KMnO4 solution.

Geochem Maps Available:

Contour plots of Zn, Cd, Hg in till; plots showing Zn values in vegetation and areas where Zn is > 500 ppm in till.

Other Analyses:

Vegetation samples ashed at 450o C and analyzed by AAS for Zn, Cd, and Hg after HNO3-HCl digestion.

Publication History

Index Publication
1 DiLabio, R.N.W., Rencz, A.N., Egginton, P.A. (1982). Biogeochemical expression of a classic dispersal train of metalliferous till near Hopetown, Ontario. Canadian Journal of Earth Sciences, v. 19, p. 2297-2305. (more)

Project History

Index Year Project
1 1978-1982 Hopetown, Ontario vegetation and till survey, 1978-1980 (more)

Geographic Extent

Minimum Latitude Maximum Latitude Minimum Longitude Maximum Longitude
45.1187° 45.1261° -76.4763° -76.4665°

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

  • Covers part of NTS 31F/1 (Carleton Place), near Hopetown, Ontario.  It is located approximately 200 m north of the Clyde River.  Highway 391 runs east-west through the study area.  It is bounded to the southwest by Wapisu Lake.

Keywords


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