An low sulfidation epithermal gold deposit.
Now largely rehabilitated since its closure in 1994.

The Remance low sulphidation epithermal gold veins have been mined intermittently since the mid 18th century with total known gold production of about 3.72 metric tons. The mine was last operated from 1990-1998 by Minera Remance S. A. which produced about 2.74 metric tons of gold at a head grade of 6.0 g/t. Reserves in 1993 were given as 500,000 metric tons at 6.0 g/t Au (3.00 t gold). Several companies carried out exploration drilling for bulk mineable targets as well as veins since the 1990s. Grades of drill intersections vary from <1 to 68.5 g/t Au over true widths of 0.17 to 6.4 m, with highlights of 0.85 m at 68.5 g/t, 0.6 m at 37.3 g/t, 1.1 m at 18.7 g/t, 1.9 m at 16.9 g/t, 2.3 m at 13.4 g/t, and 2.3 m at 12.6 g/t. Potentially bulk-mineable targets are shown by intersections of 14.2 m at 3.9 g/t, 44.4 m at 4.15 g/t, 34.0 m at 2.2 g/t, and 29.7 m at 1.8 g/t.
The geology was described briefly by Nelson (2001) as several basaltic andesite to dacite flow-domes surrounded by pyroclastic deposits including volcanic breccias, lapilli tuffs, crystal tuffs and andesite flows. Mineralization is hosted by steep quartz veins in a 3.0 km long system over 1.0 km width with the main vein trend N15°W (Principal, Santa Rosa and Consuelo veins), a secondary vein trend of N20-45°E (Huati, Baltazar, Dorita, San Fernando and Esperanza veins), and late NE-trending faults causing left-lateral offset of the Principal Vein by up to 50 m.

Other Regions, Features and Areas containing this locality

References