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Mining concessions, development costs, property, plant and equipment, net (Details 1) | Dec. 31, 2017 $ / Ounce-oz $ / MetricTon-Mg
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Gold [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | $ / Ounce-oz | 1,221
Not later than one year [member] | Gold [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | $ / Ounce-oz | 1,300
Not later than one year [member] | Silver [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | $ / Ounce-oz | 17
Not later than one year [member] | Copper [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | 6,000
Not later than one year [member] | Lead [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | 2,250
Not later than one year [member] | Zinc [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | 2,750
Later than one year and not later than two years [member] | Gold [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | $ / Ounce-oz | 1,300
Later than one year and not later than two years [member] | Silver [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | $ / Ounce-oz | 18
Later than one year and not later than two years [member] | Copper [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | 6,000
Later than one year and not later than two years [member] | Lead [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | 2,250
Later than one year and not later than two years [member] | Zinc [Member] |
Disclosure of Mining concessions, development costs, property, plant and equipment, net [Line Items] |
Commodity price estimates | 2,600

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