The 200-member union walked off the job last Thursday.

The Serrote copper-gold development will produce 22,000 tonnes per year copper-equivalent over an initial 14-year mine life.

South America, a continent that offers sweet mineral riches sometimes serves them up with a sour side-dish of political risk.

The strike entered its fifth day on Monday, as the union awaited a decision by labor authorities over whether substitute workers the company called in are legal.

Goldsource Mines is planning a second resource update for Eagle Mountain in Guyana during the second half of 2021.

Shanghai copper price registered a second consecutive month of gains on Monday as prices firmed on a potential supply threat in Chile and massive US infrastructure spending plans.