ACCESSORY AND ROCK FORMING MINERALS MONITORING THE EVOLUTION OF ZONED MAFIC-ULTRAMAFIC COMPLEXES IN THE CENTRAL URAL MOUNTAINS

Abstract

This study describes major and trace element compositions of accessory and rock forming minerals from three Uralian–Alaskan-type complexes in the Ural Mountains (Kytlym, Svetley Bor, Nizhnii Tagil) for the purpose of constraining the origin, evolution and composition of their parental melts. The mafic–ultramafic complexes in the Urals are aligned along a narrow, 900 km long belt. They consist of a central dunite body grading outward into clinopyroxenite and gabbro lithologies. Several of these dunite bodies have chromitites with platinum group element mineralization.