Coppermine River
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| Coppermine River | |
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| Origin | Lac de Gras |
| Mouth | Coronation Gulf |
| Basin countries | Canada |
| Length | 845 km (525 mi) |
| Source elevation | 396 m (1,300 ft) |
| Mouth elevation | 0 m (0 ft) |
| Basin area | Arctic Ocean |
The Coppermine River is a river in the North Slave and Kitikmeot regions of the Northwest Territories and Nunavut in Canada. It is 845 km (525 mi)[1] long. It rises in Lac de Gras, a small lake near Great Slave Lake and flows generally north to Coronation Gulf, an arm of the Arctic Ocean. The river freezes in winter but may still flow under the ice.
The community of Kugluktuk (formerly Coppermine) is located at the river's mouth.
The river was named for the copper ores which could be found along the lower river. Samuel Hearne, travelled down the river to the Arctic Ocean in 1771. Sir John Franklin also travelled down the river in the during the Coppermine Expedition of 1819–1822.
Bloody Falls, part of the Kugluk/Bloody Falls Territorial Park, is located 18.5 km (11.5 mi) from Kugluktuk, and was home to the Kogluktogmiut a sub-group of the Copper Inuit. It is the site of the Bloody Falls Massacre, when Matonabbee, Samuel Hearne's guide, and his fellow Chipewyan warriors ambushed and massacred the local Inuit.
The river is used for wilderness canoeing and rafting, although it sees only a few groups each year. It features major rapids, such as Rocky Defile, Sandstone, Muskox, and Escape Rapids, as well as many unnamed smaller sets. Bloody Falls is the final major rapid of the river, and should be portaged.
Eruption of plateau lavas near the Coppermine River, built an extensive volcanic plateau about 1,200 million years ago with an area of about 170,000 km2 (66,000 sq mi) representing a volume of lavas of at least 500,000 km3 (120,000 cu mi). The source for these lavas was the giant Mackenzie dike swarm, which is the largest dike swarm known on Earth. It is thought to have originated from a mantle plume center called the Mackenzie hotspot.
The Coppermine River is the namesake of Coppermine Herald at the Canadian Heraldic Authority.
[edit] Further reading
- Dredge, L. A. Where the river meets the sea geology and landforms of the lower Coppermine River Valley and Kugluktuk, Nunavut. [Ottawa]: Geological Survey of Canada, 2001. ISBN 0660185504
[edit] References
[edit] External links
Coordinates: 67°49′N 115°4′W / 67.817°N 115.067°W
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