Scandium,cobalt and iron geochemistry of the Fen alkaline complex,southern Norway

Whole rock abundances of Sc, Co and total Fe are presented for the Fen carbonatite complex. Average Sc and Co abundances are as follows: urtites (Sc = 1.8 ppm; Co. 5.5 ppm), ijolites (6.6; 25), silicocarbonatites (3.2; 12.2), søvites (3.5, 8.6), damtjernites (24; 57), vipetoites (5.2, 36), rauhaugites (15, 26), rødberg (61, 28). With in the ijolite-søvite series Sc decreases with degree of differentiation due to removal of pyroxene and garnet. In the damtjernite-rødberg series Sc increases with differentiation due to concentration by volatiles involved in the metasomatic conversion of damtjernite to rødberg. Data for the ijolite-søvite series is opposite to trends for this series found in the Oka carbonatite complex.