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. ISSN 0024-4937 (doi:10.1016/S0024-4937(99)00064-X)
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Publisher's URL: http://dx.doi.org/10.1016/S0024-4937(99)00064-X
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.
|Glasgow Author(s):||Ellam, Prof Robert|
|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|