Türkiye Jeoloji Bülteni

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 theEastern 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, YukarÇbalçÇklÇ area (n=12) 43 wt.% Cr2O3 and AlabayÇr(n=4) 36.5 wt. % Cr2O3. The average of ȭPGE 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 groupelements (Pd, Rh, Pt). ȭPGE of chromitites host in ultramafic tectonits are much more abundant compared tobanded chromitite host in cumulates. This results are comparable with all Turkey chromitite ore. InYukarÇbalçÇklÇ area, both existence of abundant cataclastic zones in the polished sections and boudin shapedore within shear zones contain high ȭPGE values (e.g. Sample No:YB-CO2; 627 ppb). This enrichment indicatethat multi stage of deformation may have been effected for PGE enrichment.