印尼某铁矿区岩浆岩与磁铁矿成因关系

Discussions on relationship between magmatic rocks and genesis of magnetite in an iron mine of Indonesia

通过对印尼某铁矿区岩浆岩与磁铁矿关系的研究,认为该区主花岗岩体是成矿物质的主要来源;接触交代型是矿区主要成矿类型;正长细晶岩是主花岗岩体成岩后期残余岩浆充分结晶分异的产物;正长细晶岩与花岗岩之间及其内部赋存的磁铁矿在成因上属接触交代型磁铁矿经后期残余气液充填交代叠加所形成。

According to the study on the relationships between Magmatic rocks and magnetite in an iron ore area in Indonesia, the author concluded that in this ore area, the main granite body was the predominant source of materials ; the main type was of contact meta- somatism. The syenite-aplite was the product of fully crystallization-differentiation of residual magma in late diagenetic stage of the main granite body. In genesis, the syenite-aplite and between the syenite-aplite and granite and their internal occurred magnetite belonged to contact metasomatic magnetite formed by later residual gas-liquids filled-replaced-superimposition.