JOINT FILING AGREEMENT
Exhibit 99.1
The undersigned acknowledge and agree that the foregoing Schedule 13D is filed on behalf of
each of the undersigned and that all subsequent amendments to this Statement on Schedule 13D may be
filed on behalf of each of the undersigned without the necessity of filing additional joint filing
agreements.
Dated: January 7, 2010
| TONGLING NONFERROUS METALS GROUP HOLDINGS CO., LTD. |
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| By: | /s/ Xxxxxxxx XX | |||
| Name: | Xxxxxxxx XX | |||
| Title: | Chief Engineer | |||
| CHINA RAILWAY CONSTRUCTION CORPORATION LIMITED |
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| By: | /s/ Xxxxxxxx XXXX | |||
| Name: | Xxxxxxxx XXXX | |||
| Title: | Company Vice President | |||
| CRCC-TONGGUAN INVESTMENT CO., LTD. |
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| By: | /s/ Shouhua JIN | |||
| Name: | Shouhua JIN | |||
| Title: | Chairman | |||
