Temagami Magnetic Anomaly
- Temagami Magnetic Anomaly
The Temagami Magnetic Anomaly, also called the Temagami Anomaly or the Wanapitei Anomaly, is a large buried geologic structure, stretching from Lake Wanapitei in the west to Bear Island in Lake Temagami.
The magnetic anomaly is located on the Canadian Shield in the Temagami region of northeastern Ontario. The Aboriginal community of Teme-Augama Anishnabai lies partly within the Temagami Magnetic Anomaly, including the Temagami First Nation on Bear Island which is a portion of the Aboriginal community.
The Temagami Magnetic Anomaly is located near a number of other geological structures, including the Sudbury Basin, the Lake Wanapitei impact crater and the Temagami greenstone belt, although none of the structures are directly related to each other in the sense of resulting from the same geophysical processes.
Discovery and structure
The Temagami Magnetic Anomaly is egg shaped, Unit km|58|0 long and Unit km|19|0 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. [ [http://gdcinfo.agg.nrcan.gc.ca/app/3Dimaging/temagami_e.html 3-D Magnetic Imaging using Conjugate Gradients: Temagami anomaly] Retrieved on 2008-03-11] 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. [ [http://temagami.nativeweb.org/temagami-anomaly.html Temagami Magnetic Anomaly] , retrieved on March 11, 2008.]
References
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