Geochemical evolution of the Ivigtut granite, South Greenland: a fluorine-rich "A-type" intrusion

Goodenough, K.M., Upton, B.G.J. and Ellam, R.M. (2000) Geochemical evolution of the Ivigtut granite, South Greenland: a fluorine-rich "A-type" intrusion. Lithos, 51(3), pp. 205-221. (doi: 10.1016/S0024-4937(99)00064-X)

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The Ivigtut alkali granite stock lies within the Proterozoic Gardar alkaline igneous province of South Greenland. This small (300 m across) granite body once contained the world's largest body of cryolite, now mined out. The granite surrounding the cryolite body has been extensively metasomatised by F- and CO2- rich fluids, leading to zonal enrichment in HFSE and REE. Variations in the Rb-Sr and Sm-Nd systematics of the granite can be correlated with the degree of metasomatism. Unaltered granites have highly variable initial Sr-87/Sr-86, and initial epsilon(Nd) ratios of around -3, suggesting formation through crustal contamination of a mantle-derived magma. Metasomatised granites show higher initial epsilon(Nd) ratios, which can be interpreted to suggest that the metasomatic fluid was derived from a mantle source.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Ellam, Professor Rob
Authors: Goodenough, K.M., Upton, B.G.J., and Ellam, R.M.
Subjects:Q Science > QE Geology
College/School:College of Science and Engineering > Scottish Universities Environmental Research Centre
Journal Name:Lithos
Publisher:Elsevier BV
ISSN (Online):1872-6143

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