Attawapiskat Kimberlite Field
The Attawapiskat kimberlite field is a field of kimberlite pipes located astride the Attawapiskat River in the Hudson Bay Lowlands, in Northern Ontario, Canada. It is thought to have formed about 180 million years ago in the Jurassic period when the North American Plate moved westward over a centre of upwelling magma called the New England hotspot, also referred to as the Great Meteor hotspot. Since June 26, 2008, the De Beers Open-pit mining, open pit Victor Diamond Mine has been in operation mining two pipes in the field at , about west of the community of Attawapiskat First Nation, Attawapiskat. The mine was expected to produce of diamonds a year. See also *Volcanism of Canada *Volcanism of Eastern Canada *List of volcanoes in Canada References

Volcanoes of Ontario Jurassic volcanoes Landforms of Kenora District Volcanic fields of Canada {{Jurassic-stub ...
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Kimberlite Pipe
Volcanic pipes or volcanic conduits are subterranean geology, geological structures formed by the violent, supersonic eruption of deep-origin volcanoes. They are considered to be a type of ''diatreme''. Volcanic pipes are composed of a deep, narrow cone of solidified magma (described as "carrot-shaped"), and are usually largely composed of one of two characteristic rock types — kimberlite or lamproite. These rocks reflect the composition of the volcanoes' deep magma sources, where the Earth is rich in magnesium. Volcanic pipes are relatively rare. They are well known as the primary source of diamonds, and are mined for this purpose. Formation Volcanic pipes form as the result of violent eruptions of deep-origin volcanoes. These volcanoes originate at least three times as deep as most other volcanoes, and the resulting magma that is pushed toward the surface is high in magnesium and Volatiles#Igneous petrology, volatile compounds such as water and carbon dioxide. As the body of ...
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