REE Geochemistry of fluorite mineral in fluorite deposits of Centeral Alborz

Fluorite mineralization occurred in Central Alborz in Elika and Tizkooh Formations. The genesis of these deposits are considered to be epigenetic to sedimentary-diagenetic type. The obtained results show that all sedimentary-diagenetic and epigenetic fluorits are with similarities normalized patterns. These similarities can be considered from solution, transportation or recrystalization of former fluorites (sedimentary-diagenetic) epigenetic fluorite originated. The pattern similarity of fluorite and host rock, it can be concluded that remobilization of F element occurred and differential patterns between fluorite and igneous rock described their independency. In Kamarpohst ore deposit, the amount of REE is increasingly from fluorite zone to alteration and finally to basalt. Also the highest amount of REE identified in basalt and the lowest amount find in fluorite. Moreover, there was a complete similarity between normalized pattern of basalt, alteration halo and fluorite vein in Kamarposht deposit. This can show the leading of REE from the basalt and transported to fluorite vein. The dissimilarity in normalized pattern in black shale, sandstone and fluorite can be explained as differently origins. This result can be supported by the low amount of REE in sandstone and shele.Because of negative anomaly of Eu and positive anomaly for Ce, the environment of fluorite in Elica Formation was reduction.