Les avis de diffusion du dossier public de la CGC

OPEN FILES 506 and 507

National Geochemical Reconnaissance releases NGR 17-1977, 18- 1977.

Regional lake sediment and water geochemical reconnaissance data; Ontario - North Shore Lake Superior, NTS 42D, 3 (s/2) and 52A, H (s/2)

          These files relate to data acquired under the Federal-Provincial Uranium Reconnaissance Program, the provincial part being financed through the Canada-Ontario Agreement on a Uranium Reconnaissance Program.

          The project was jointly planned by the Geological Survey of Canada and the Ontario Ministry of Natural Resources. The contracts for field work, sample preparation and sample analysis were let, supervised and monitored by the Geochemistry Section, Geological Survey of Canada.

          The survey covers approximately 27,700 km ² (10 70 mi ²) at an average sample density of one sample per 12 km ² (5 mi ²). Lake sediments were analyzed for U, Zn, Cu, Pb, Ni, Co, Ag, Mn, Fe, Mo, Hg and As and loss-on-ignition to estimate organic carbon content. Lake waters were analyzed for U, F and pH.

          Each open file consists of 13 geochemical maps, sample location map and a text of field operations and analytical and statistical data. The total area is divided up into two open files. These files will be placed on Open File for inspection from 1:00 p.m. EDT, Thursday, June 8, 1978 (and equivalent local times) at all the libraries of the Geological Survey of Canada, at the Ontario Ministry of Natural Resources, Public Service Centre, 6th Floor, Whitney Block, Queen's Park, Toronto, Ontario and at the offices of the Regional Geologists in Thunder Bay, Kenora and Sault Ste. Marie, Ontario.

          A limited number of white prints and text will be available for sale at the Toronto Public Service Centre and the offices of the Regional Geologists. White print and text copies may also be obtained at the user's expense by application to Campbell Reproductions, 880 Wellington Street, Ottawa, Ontario, K1R 6K7. The field observations and analytical data in the text from which the maps were prepared are also available in a digital form at the user's expense from The Director, Computer Science Centre, Department of Energy, Mines and Resources, 588 Booth Street, Ottawa, Ontario, K1A 0E8.