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Subsequent Event (Tables) | 12 Months Ended
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Dec. 31, 2012
Subsequent Events [Abstract] |
Subsequent Event Exploration Commitment |
Due Dates | Expenditures (US$)
18 months | $ 2,000,000
36 months | $ 3,000,000
60 months | $ 5,000,000
Total | $ 10,000,000

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