Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4717277 | Lithos | 2009 | 7 Pages |
Abstract
The youngest alkaline and ultrapotassic magmatism in West Greenland (Mesozoic to Paleogene) extends for more than 300Â Â km along the coast and the ages obtained in this study for two Jurassic carbonatite complexes, the 165Â Ma Qaqarssuk complex near Maniitsoq and the 158Â Ma Tikiusaaq complex east of Nuuk, indicate that carbonatites are also an integral part of this Jurassic alkaline province. There is a peak in alkaline and ultrapotassic magmatism in West Greenland during the period 165-145Â Ma, possibly indicating a period of increased extension during the opening of the North Atlantic Ocean.
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Authors
K. Secher, L.M. Heaman, T.F.D. Nielsen, S.M. Jensen, F. Schjøth, R.A. Creaser,