A simple technique to identify magnetic anomalies due to kimberlite pipes

Most of the world's known kimberlites have distinctive geophysical signatures, generally magnetic and/or electromagnetic. In the Canadian Shield, their aeromagnetic signature is often that of a circular anomaly. Target selection from aeromagnetic data is therefore based on the identification of roughly circular anomalies. This procedure can be automated by using known pattern recognition techniques. The locations of the solutions are plotted on the aeromagnetic map and, if available, on a conductivity map. The Kirkland Lake region was selected to test the methodology and the proposed technique has been able to identify known kimberlites. -from Author