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OPEN FILE 718

Preliminary Geomathematical Analysis of Geological, Mineral Occurrence and Geophysical Data, Southern District of Keewatin, Northwest Territories, by F.P. Agterberg, C.F. Chung, S.R. Divi, K.E. Eade and A.G. Fabbri

This study carried out in 1979 is a step in development of methods for regional resource appraisal using geomathematical techniques. The southern part of the District of Keewatin was used as a test area. The purpose of this report is to explain the methods and to indicate directions of work to overcome some of the present limitations on use of data.

Thirty-four generalized rock units were defined and, together with gravity data, digitized for square picture elements measuring 500 m on a side. Multi-variable statistical techniques were applied to data for selected occurrences of mineralization of the following four types: (a) Volcanogenic massive sulphide type; (b) Au in Archean volcanic and sedimentary rocks, gneisses, etc.; (c) Mainly Cu in mafic-intermediate volcanic rocks; and (d) Cu-Ni in mafic and ultramafic rocks. Correlation of these mineral occurrence data with the digitized geological data resulted in a set of probability index maps for each type with index numbers that indicate the relative favourability of occurrence of mineralization in 10 km x 10 km cells.

This open file is available for viewing as of April 29, 1981 at all Geological Survey libraries and at the Resident Geologist’s Office, Department of Indian and Northern Affairs, Bellanca Building, P.O. Box 1500, Yellowknife, Northwest Territories X1A 2R3.  Copies may be obtained at the user’s expense from GSC sales offices in Vancouver, Calgary and Ottawa; and Resident Geologist’s Office in Yellowknife.

Price: $5.00

 

{#889, April 1981 circular}