GSC Open File Release Notices

Archived information

The text below is an exact reproduction of the original release notice, which was often unilingual.  It contains information that is not readily available elsewhere.  The information on pricing and availability is out of date.

Release Notice Text


Contamination in Overburden Samples Obtained by the Rotary Dualtube Drilling Technique

Unedited manuscript report by D.A. Proudfoot, R.G. Skinner and W.W. Shilts discussing contamination introduced by abrasion of tungsten-brass alloys in components of equipment during drilling to obtain overburden samples for geochemical analysis. Copies are available at a cost of $1.00 from the Publications Distribution Office, Geological Suvey of Canada, 601 Booth Street, Ottawa, Ontario, K1A 0E8.


{#820, April 1975 circular}


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