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  The information on pricing and availability is out of date.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


Airborne Radioactivity Maps and Profiles

Airborne Radioactivity Maps – Elliot Lake, Ontario

Radioactivity data obtained with the Geological Suvey of Canada high sensitivity airborne gamma-ray spectrometer system are being released for a 50 sq. km area centred on the town of Elliot lake, Ontario. This detailed survey was flown to June 1977 with a mean line spacing of 122 m. Results are presented as contour maps at a scale of 1:13 333 showing total count, potassium, equivalent uranium, and equivalent thorium concentrations, and eU/eTh, eU/K, and eTh/K ratios, superimposed on a semi-controlled photomosaic base. This survey was flown at the request of the Atomic Energy Control Board.

The release will be available for inspection from 1:00 p.m. E.S.T., December 21, 1977 (and equivalent local times) at the libraries of the Geological Suvey of Canada and the Public Service Centre, Ministry of Natural Resources, Room 6404, Whitney Block, Queen’s Park, Toronto, Ontario.

White print copies may be purchased from Terra Surveys Limited, 2060 Walkley Road, Ottawa, Ontario, K1G 3P5.


{#851, December 1977 circular}


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