Biogeochemical survey, parts of NTS 32D/4, 5, Kirkland Lake area, northeastern Ontario, 1992.
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Tree tissues were collected along transects over kimberlite bodies during a two day period in August, 1992 in the Kirkland Lake area, northeastern Ontario. At each location tissues of the dominant species were collected: twigs of balsam fir at Diamond Lake kimberlite pipe; twigs and outer bark of black spruce at the C14 pipe; and twigs of both balsam fir and pin cherry at the Buffonta dyke. At Diamond Lake, balsam fir twigs were collected from 13 sample sites spaced 100 m apart along a 1200 m north to south transect. At the Buffonta property, pin cherry and balsam fir twigs were collected from 12 sites at 30 m intervals along two transects. At the C14 pipe, black spruce bark and twig samples were collected along a 400 m transect over the kimberlite from 9 sites spaced at 50 m intervals. The data are published in Geological Survey of Canada Open File 3005. A summary of this work can be found in Geological Survey of Canada 3228.
Usually 5 to 7 twigs, each comprising 5 to 7 years of growth were collected, commonly 35 to 40 of twig. It is important to maintain a consistent ratio of twig bark to twig wood because many of the heavy metals are located in the bark of the twig rather than its woody tissue. The loose, dead tissue comprising the scaly outer bark of black spruce trees was collected.
|1||McClenaghan, M.B., Dunn, C.E. (1995). Biogeochemical survey over kimberlites in the Kirkland Lake area, northeastern Ontario. Geological Survey of Canada, Open File 3005. (more)|
|2||Dunn, C.E., McClenaghan, M.B. (1996). Biogeochemical studies of kimberlites. In Searching for Diamonds in Canada, A.N. LeCheminant, D.G. Richardson, R.N.W. DiLabio and K.A. Richardson (ed.). Geological Survey of Canada, Open File 3228, p. 219-223. (more)|
|1||1992-1999||Kirkland Lake Kimberlite Project, 1992-1997 (more)|
|Minimum Latitude||Maximum Latitude||Minimum Longitude||Maximum Longitude|
The geographic extent of the survey is defined by the following polygons:
Covers part of NTS 32D/4 in the southwest corner of McVittie Township east of the Misema River near Diamond Lake approximately 3 km northwest of the town of Larder Lake in northeastern Ontario. The study area is centred on the Diamond Lake kimberlite pipe located at 48°06'20"/79°45'30".
Covers part of NTS 32D/5 in central Garrison Township on the old Buffonta Mines Property just west of the old Buffonta pit in northeastern Ontario. The study area is centred around the Buffonta kimberlite dike located at 48°28'02"/79°56'52".
Covers part of NTS 32D/5 in south-central Clifford Township just southeast of Kennedy Lake in northeastern Ontario. The study area is centred on the C-14 kimberlite pipe located at 48°16'30"/79°48'.
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