Geochemical Properties and Platinum Group Element (Pge) Contents of Eastern Turkey (Van Area) Chromitite

Abstract

Eastern Anatolia (Van) chromite deposits are associated with an east-west trending units of peridotite in the Eastern Anatolia Accretionary Complex (EAAC). The samples taken from four different areas were analyzed for their trace, major oxides and PGE contents. The average content of chromite ore as follows: Mehmetalan n=11) 45.3 wt. % Cr2O3, Mollatopuz (n=15) 31 wt. % Cr2O3, Yukaribacikh area (n=12) 43 wt.% Cr2O3 and Alabayir (n=4) 36.5 wt. % Cr2O3. The average of Sigma PGE results of same group samples contain 194 ppb, 86 ppb, 287 ppb, and 122 ppb respectively. Ir group (Ir, Os, Ru) elements show significantly enrichement compare to Pd group elements (Pd, Rh, Pt). Sigma PGE of chromitites host in ultramafic tectonits are much more abundant compared to banded chromitite host in cumulates. This results are comparable with all Turkey chromitite ore. In Yukaribalcikh area, both existence of abundant cataclastic zones in the polished sections and boudin shaped ore within shear zones contain high Sigma PGE values (e.g. Sample No:YB-CO2; 627 ppb). This enrichment indicate that multi stage of deformation may have been effected for PGE enrichment.