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Property and equipment (Tables)
9 Months Ended
Oct. 31, 2012
Schedule of Property, Plant and Equipment [Table Text Block]
    October 31, 2012     January 31, 2012  
Geology equipment $   261,055   $ 290,736  
Vehicles and transportation equipment   50,180     50,180  
Office furniture and equipment   73,451     73,451  
    384,686     414,367  
Less: Accumulated depreciation   (295,488 )   (284,857 )
  $   89,198   $ 129,510