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  EXPLANATORY REPORT FOR THE MAHABAD QUADRANGLE MAP 1:250,000 (NORTH KURDESTAN)
report of 1:25000 Mahabad map
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   Two samples rather representing the south Mahabad batholith and Chahar Divar granite analyzed for trace elements by qualitative estimation and the results are shown in Table 3. Jt should be considered that one or two samples can not express in any case the definite concentration valid for the whole intrusive body, nevertheless only from the quantities point of view we can make some preliminary conclusion that the value of Ag, Co, Cu, Li, Pb, La is rather high. Doran granite present in Mahabad area has a sharp contrast in their petrographic composition with Upper Cretaceous granite, which is extensively occurring in the map limit. No intrusive contact younger than Mahabad Formation has been observed and the phenomena of contact metamorphism due to intrusion of (he granite are not evident in the surrounding Precambrian basement rocks. This possibly might be due to the shallow intrusive character resembling subvolcanics. The lack of contact aureole can be interpreted as a result of the reaction of later regional metamorphism.
   The Doran Granite is truncated by erosion during Infracambrian and transgressively overlain by the Bayandor Formation in southern Mahabad range (east of Bayram). The granite along the contact is strongly weathered and covered by 3 meters of soft clay sediments, which are mainly derived from washed out weathering products of the granite. These basal clay sediments contain reworked grains of quartz and kaolinitized feldspar, followed by the normal red micaceous shale and sandstone.
  
 
 
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