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113:, making it one of the largest positive anomalies in North America. The eastern section coincides with a small positive gravity anomaly, indicating the presence of dense rocks at depth. The anomaly was discovered by a magnetic survey and a gravity survey.
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Kawohla, Alexander; Frimmel, Hartwig E.; Bitec, Andrejs; Whymarkd, Wesley; Debaillee, Vinciane (May 2019). "Very distant
Sudbury impact dykes revealed by drilling the Temagami geophysical anomaly".
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In 2014, a 2200m borehole was drilled at Afton
Township where the anomaly is at its maximum. Analysis of the lowest most rocks indicated similarities with the quartz diorite dykes found at the
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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 east–west strike.
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The western portion appears smoother in character while the eastern section is long and narrow. With an areal extent of 50 x 15 km, it reaches a magnitude of approximately
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Landsat image showing the anomaly, cross is at the centre of it. Shows the terrain only, not the magnetic deviations of the area.
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The
Temagami Magnetic Anomaly was first found in the late 1940s during a magnetic survey by Norman Bell Keevil.
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on Bear Island. Located nearby are a number of other geological structures, including the
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What's inside the
Temagami geophysical anomaly, Sudbury District, Ontario?
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The
Anomaly on a map, the larger pink spot near the center of the image.
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3-D Magnetic
Imaging using Conjugate Gradients: Temagami anomaly
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lies partly within the
Temagami Magnetic Anomaly, including the
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resulting from a large buried geologic structure in the
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SGA Québec 2017 extended abstract, Vol. 4, 1543-1546.
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199:Geophysics, Vol. 62, No. 4 (July–August 1997).
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208:Kawohl, Alexander et al. (2017).
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81:Lake Wanapitei impact crater
67:The Aboriginal community of
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249:Temagami magnetic anomaly
195:Pilkington, Mark (1997).
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130:Maple Mountain (Ontario)
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135:Bangui magnetic anomaly
118:Sudbury Igneous Complex
91:Discovery and structure
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69:Teme-Augama Anishnabai
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73:Temagami First Nation
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170:Precambrian Research
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34:Wanapitei Anomaly
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238:47.0°N 80.2°W
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151:References
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