Prospect Database: Monte Negro Deposit
| Prospect | Monte Negro | Production reference | Ruiz (1998), GoldCorp annual reports |
| Country | Dominican Republic | Production Period | 1975-1996, 2012 to present |
| Reference Location | field visit | Gold in ounces | 2,996,430 |
| District | Pueblo Viejo | Silver in ounces |
11,913,959 |
| Deposit Type | Epithermal High Sulfidation | Copper in Tons | 360 |
| Owners | Rosario Dominicana | Lead in Tons | |
| Partners | Barrick Gold 60%, GoldCorp 40% | Zinc in Tons | |
| Deals | 1991 international bidding process won by Placer Dome | Aluminum in Tons | |
| Nickel in Tons | |||
| Resource in Tonnes | 81,730,000 | Reserve in Tonnes | 105,100,000 |
| Gold grade in ppm | 1.88 | Gold grade in ppm | 2.7 |
| Silver grade in ppm | 10.43 | Silver grade in ppm | 16.9 |
| Copper grade in pct | 0.08 | Copper grade in pct | 0.07 |
| Lead grade in pct | 0 | Lead grade in pct | 0 |
| Zinc grade in pct | Zinc grade in pct | ||
| Reference Resource | Borst et al., 2012; Smith et al., 2008 | Reference reserve | Borst et al., 2012; Smith et al., 2008 |
| Status | The Pueblo Viejo mine, inactive since June of 1999, was put out to an international bidding process, won by Placer Dome. Placer Dome was acquired by Barrick and Barrick, jointly with GoldCorp, put the mine back into production in 2012. Capital costs, estimated to run $2,700 million, ended up costing almost $5 billion. | ||
| Drilling | 138,349 meters in 1814 drill holes at a spacing of 60-80 m. | ||
| Observations | Metallurgical challenges, addressed by the new plant and autoclaves, include high sulfide content (8%), local high copper and arsenic content, high carbon content, and silica encapsulation. | ||