On the basis of field investigation, mineralogical
characteristics of ore-magma type magnetite were studied by the means of
optical microscopy, X-ray diffraction, scanning electronic microscopy, chemical
analysis and fluid inclusion composition analysis of Taliabu Sn-Fe polymetallic
deposit, Indoneisa. The results show that ore-magma type ore body with an
injection and filling shape has a clear boundary with all rocks with simple alterations.
Iron ores has typical fabric of iron ore-magma type including bulk band structure,
vesicular structure, rhyotaxitic structure, sintered nodular structure and
tricrystal embedded linked texture. The mineral assemblage is simple. Magnetite
is main mineral. The apatite with magnetite is the typical mineral assemblage.