Discovery and Structure
The Temagami Magnetic Anomaly is egg shaped, 58 km (36 mi) long and 19 km (12 mi) wide. The central section has the greatest amplitude and an E-W strike. The western portion appears smoother in character while the eastern section is long and narrow. With an areal extent of 50 x 15 km, the Temagami Magnetic Anomaly reaches a magnitude of approximately 10,000 nanoteslas making it one of the largest positive anomalies in North America. It was discovered by a magnetic survey and a gravity survey.
The Temagami Magnetic Anomaly has striking similarities to the nearby Sudbury Basin, which is one of the richest mining areas in the world. Its magnetic anomalies are very similar to the Sudbury Basin and so it could be a second metal-rich impact crater.
Read more about this topic: Temagami Magnetic Anomaly
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