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

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.