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The Temagami Magnetic Anomaly, also called the Temagami Anomaly or the Wanapitei Anomaly, is a
The Temagami Magnetic Anomaly is egg-shaped, long and wide. The central section has the greatest amplitude and an east-west 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, it reaches a magnitude of approximately 10,000 nanoteslas, 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.
The Temagami Magnetic Anomaly has similarities to the nearby Sudbury Basin, which is one of the richest mining areas in the world, and so it could be a second metal-rich impact crater.Temagami Magnetic Anomaly
retrieved on March 11, 2008.
The Temagami Magnetic Anomaly, also called the Temagami Anomaly or the Wanapitei Anomaly, is a magnetic anomaly
In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying ...
resulting from a large buried geologic structure in the Canadian Shield near Temagami, Ontario
Temagami, formerly spelled as Timagami, is a municipality in northeastern Ontario, Canada, in the Nipissing District with Lake Temagami at its heart.
The Temagami region is known as ''n'Daki Menan'', the homeland of the area's First Nations co ...
, Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
. It stretches from Lake Wanapitei
Lake Wanapitei (also known as Lake Wahnapitae) occupies a meteorite crater in Sudbury, Ontario, Canada. It is located near the much larger Sudbury meteorite crater but they are not related.
The crater is in diameter and the age is estimated to ...
in the west to Bear Island in Lake Temagami
Lake Temagami, formerly spelled as Lake Timagami, is a lake in Nipissing District in northeastern Ontario, Canada, situated approximately 80 km north of North Bay. The lake's name comes from ''dimii-agamiing'' "tih-MEE-uh-guh-MEENG", which m ...
.
The Aboriginal community of Teme-Augama Anishnabai
The Teme-Augama Anishnabai (from the Anishinaabe ''Dimii'aagamaa Anishinaabe'', "the deep water people") is the Indigenous Anishinaabe community of the Temagami First Nation. The Teme-Augama Anishnabai have trapped and hunted animals in the Temag ...
lies partly within the Temagami Magnetic Anomaly, including the Temagami First Nation
The Temagami First Nation is located on Bear Island in the heart of Lake Temagami. The island is the second largest in Lake Temagami, after Temagami Island. Its community is known as Bear Island 1. Temagami First Nation (TFN) members are status ...
on Bear Island. Located nearby are a number of other geological structures, including the Sudbury Basin, the Lake Wanapitei impact crater, and the Temagami Greenstone Belt
The Temagami Greenstone Belt (TGB) is a small 2.7 billion year old greenstone belt in the Temagami region of Northeastern Ontario, Canada. It represents a feature of the Superior craton, an ancient and stable part of the Earth's lithosphere ...
.
Discovery and structure
The Temagami Magnetic Anomaly is egg-shaped, long and wide. The central section has the greatest amplitude and an east-west 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, it reaches a magnitude of approximately 10,000 nanoteslas, 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.
The Temagami Magnetic Anomaly has similarities to the nearby Sudbury Basin, which is one of the richest mining areas in the world, and so it could be a second metal-rich impact crater.retrieved on March 11, 2008.
See also
* Maple Mountain (Ontario) * Bangui magnetic anomaly *Kursk Magnetic Anomaly
Kursk Magnetic Anomaly (russian: Курская магнитная аномалия) is a territory rich in iron ores located within the Kursk, Belgorod, and Voronezh oblasts in Russia, and constitutes a significant part of the Central Chernozy ...
* Ishpatina Ridge
Ishpatina Ridge is the highest point of land in the Canadian province of Ontario, at an estimated above sea level. Ishpatina Ridge rises approximately above the immediate area. It was only truly recognized as Ontario's highest point after topog ...
References
{{coord, 47.0, -80.2, region:CA-ON_scale:100000, display=title, name=Temagami magnetic anomaly Geology of Temagami Magnetic anomalies