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MINERAL RIGHTS AND PROPERTIES (Tables)
3 Months Ended
Oct. 31, 2013
Schedule of Mineral Rights and Property Acquisition Costs [Table Text Block]
    October 31, 2013     July 31, 2013  
Mineral Rights and Properties, Unproven            
 Palangana Mine $ 7,045,457   $ 7,045,457  
 Goliad Project   8,689,127     8,689,127  
 Burke Hollow Project   1,313,250     1,313,250  
 Channen Project   428,164     428,164  
 Salvo Project   364,710     363,645  
 Nichols Project   154,774     154,774  
 Anderson Project   9,154,268     9,154,268  
 Workman Creek Project   1,287,158     1,287,158  
 Los Cuatros Project   257,250     257,250  
 Slick Rock Project   171,271     163,213  
 Todilto Project   166,720     166,720  
 Yuty Project   11,947,144     11,947,144  
 Coronel Oviedo Project   1,133,412     1,133,412  
 Other Property Acquisitions   1,081,848     1,067,148  
    43,194,553     43,170,730  
Impairment of Mineral Rights and Properties   (28,891 )   -  
    43,165,662     43,170,730  
Accumulated Depletion   (2,623,879 )   (2,278,053 )
    40,541,783     40,892,677  
             
Databases   2,405,038     2,345,038  
Accumulated Amortization   (1,743,895 )   (1,685,011 )
    661,143     660,027  
             
Land Use Agreements   390,155     390,155  
Accumulated Amortization   (166,760 )   (157,007 )
    223,395     233,148  
  $ 41,426,321   $ 41,785,852  
Schedule of Mineral Property Expenditures [Table Text Block]
    Three Months Ended October 31,  
    2013     2012  
Mineral Property Expenditures            
 Palangana Mine $ 671,582   $ 1,823,863  
 Goliad Project   144,971     104,002  
 Burke Hollow Project   174,298     1,102,932  
 Channen Project   465     691,262  
 Anderson Project   84,161     74,722  
 Workman Creek Project   28,971     30,936  
 Slick Rock Project   49,025     55,010  
 Yuty Project   17,825     91,270  
 Coronel Oviedo Project   84,151     199,801  
 Other Mineral Property Expenditures   332,694     203,487  
  $ 1,588,143   $ 4,377,285