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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) | 12 Months Ended
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Dec. 31, 2013
Gold and Silver | El Gallo Complex |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Option to sell prior to the completion of refining (as a percent) | 90.00%
Period of completion of refining | 15 days
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | NSR royalty agreement |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Net smelter return (as a percent) | 3.50%
Quantity produced (in ounces) | 110,000
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | Production up to 30000 ounces | NSR royalty agreement |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Net smelter return (as a percent) | 1.00%
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | Production up to 30000 ounces | NSR royalty agreement | Maximum |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Production quantity used to determine net smelter return | 30,000
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | Production between 30001 to 380000 ounces | NSR royalty agreement |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Net smelter return (as a percent) | 3.50%
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | Production between 30001 to 380000 ounces | NSR royalty agreement | Minimum |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Production quantity used to determine net smelter return | 30,001
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | Production between 30001 to 380000 ounces | NSR royalty agreement | Maximum |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Production quantity used to determine net smelter return | 380,000
Gold and gold equivalents | El Gallo 1 mine and El Gall 2 project | Production above 380000 ounces | NSR royalty agreement |
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
Net smelter return (as a percent) | 1.00%

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- Definition Represents the quantity of physical commodities produced by the entity during the period. + References No definition available. + Details
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- Definition Represents the production quantity of physical commodities used as a basis to determine the net smelter return ("NSR") per the terms of the royalty agreement. + References No definition available. + Details
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- Definition Represents the net smelter return from the royalty agreement with a third party. + References No definition available. + Details
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Namespace Prefix: | mux_
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Balance Type: | na
Period Type: | duration

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- Definition Represents the option held by the entity to sell the product prior to completion of refining. + References No definition available. + Details
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- Definition Represents the number of business days for completion of refining. + References No definition available. + Details
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