Abstract

Halab iron occurrence in the northern part of Sanandaj-Sirjan zone is located in the south-west of Zanjan (26 km south-west of Dandy). Iron mineralization is hosted by schist and quartzite sequence. All lithologies in this area are to be understood as metamorphic equivalents of Kahar Formation which is overlain by Jan Gutaran marble and  dolomitic  unit.  Their  contacts  are  mostly  faulted. The  iron  mineralization  is  stratiform  within  the metamorphosed  Kahar  Formation  and  occurs  as  banded  iron  parallel  to  the  foliation  of  host  schist  units. Magnetite  and  hematite  are  the  main  ore  minerals  in  this  occurrence.  The  ore  minerals  show  disseminated, laminated, banded and massive textures. The magnetite of the Halab iron is characterized by annealing textures. Pyrite  in  small  amounts  is  the  result  of  sulfide  mineralization.  Goethite,  limonite  and  barite  are  products  of supergene processes.