Ming is a copper-gold massive sulfide deposit located in northwestern Newfoundland in a region that has a strong history of gold, base metal and industrial minerals mining. The two dominant types of mineralization at Ming are stratiform volcanogenic massive sulphide (Ming Massive Sulphide) and disseminated sulphide stringers (Lower Footwall Zone).
Production began in late 2011 and Rambler produced approximately 15 kozs of gold in five months from a high-grade gold area, known as the 1806 Zone. This early production from the gold zone allowed Rambler to generate revenue while the company constructed a copper flotation circuit at the Nugget Pond Mill approximately 40 km from the Ming mine. The processing facility includes a conventional crushing, grinding and flotation process that has been in commercial production since the second quarter of 2013. Recoveries range between 94% and 96% for copper and 65% to 70% for gold.
Rambler expanded the mill throughput capacity to 1,250 tpd in 2017 and the current mine plan from the June 2015 Pre-Feasibility Study has production continuing through 2036. The Proven and Probable Reserves as of July 2015 are 8.7 Mt of ore containing 1.79% copper and 0.5 g/t gold (1.56% CuEq cut-off).
The surface exploration program at the Ming mine has demonstrated that the lower footwall zone mineralization continues beyond defined mineral reserves and increases in grade and thickness with depth. The second and third drill holes, RM17-25a and 25b, have extended the lower footwall zone an additional 550 metres down-dip beyond any previous drilling. The mine was expected to reach and sustain 1,250 tpd in late 2017.
The first hole from Rambler´s surface exploration program has been completed and confirmed depth extension at both the Ming Massive Sulphide zone and the Lower Footwall zone. The drill hole was drilled from surface to a depth of 1,771 metres. Mineralized intersections include 6.3 m of 2.85% copper and 3.0 g/t gold in the massive sulphides and 40.0 m of 1.42% copper in the lower footwall zone.