Iron-phosphate deposit geology and metallogenic specialization in the Tianshan metallogenic belt, Xinjiang

Abstract：This paper deals with the mineral-bearing characteristics of magmatite complex rocks in the Tianshan metallogenic belt. 4 mineral-bearing complex rock belts and 5 deposit genetic types have been determined. The research on metallogenic specialization shows the following characteristics: 1) Magmatite iron phosphate is controlled by the deep fracture at the edge of the platform; 2) The host rock is mainly of the alkaline ferruginous-mafic rocks suite; 3) The major and trace elements in host rack are obviously inconsistent with each other; 4) The paragenesis of rock types mainly shows the association relationships of biotite diopsidite, pyroxenite, alkaline gabbro, plagioclase and carbonate rock; 5) Mineral paragenesis mainly shows the characteristics of diopside + apatite + magnetite + biotite, plagioclase + apatite + magnetite + soda-zoisite and pyroxene + apatite + magnetite. The elements paregenesis shows notable correlation of P, Fe, Ti, V and REE. Based on prognostic research, the authors delineated 9 ore perspective areas with ore-forming conditions.