Locating Magnetic Contacts and Source Characteristics from Magnetic Data – Application to the Canadian Shield

P103 LOCATING MAGNETIC CONTACTS AND SOURCE CHARACTERISTICS FROM MAGNETIC DATA: APPLICATION TO THE CANADIAN SHIELD 1 P. KEATING 1 M. PILKINGTON 1 P. SAILHAC 2 L. NADEAU 1 1 Geological Survey of Canada 615 Booth Ottawa Ont. Canada K1A 0E9 2 Ecole et Observatoire des Sciences de la Terre de Strasbourg Introduction Canada is one of the largest countries in the world its landmass covers more than 9 000 000 km 2 . Most of the population is concentrated along the southern border. As one goes from south to north access becomes more and more difficult and costly. Geological mapping