The plant has been treating excessive grade ore averaging 16.5 g/t gold since mid-Could. Gold restoration will in all probability be above 90%, however a number of extra weeks of working information will likely be wanted for certainty.
The plant had minor start-up points in each circuits, however they have been resolved in early Could. Difficulties have been encountered in getting cyanide concentrations as much as the required ranges within the cyanidation reactor and a scarcity of filter press cloths.
To make up for the delay in plant start-up, Mako intends to course of solely excessive grade vein materials till the top of June.
The open pit mine is averaging 982 tonnes of ore every day. A 105,856-tonne stockpile consists of 17,596 tonnes of diluted vein materials grading 15.37 g/t gold and 88,260 tonnes of historic dump materials at 2.47 g/t for 16,676 oz. of whole contained gold.
The beginning of mining within the Porcelana zone is to start early within the third quarter 2021. This zone has the excessive grade and thickness profile encountered on the mine.
The November 2020 estimate for the pit has totally diluted measured and indicated sources of 310,900 tonnes grading 9.54 g/t gold, containing 95,400 oz. of gold. The totally diluted inferred useful resource is 226,700 tonnes grading 8.50 g/t gold, containing 62,000 oz. of gold.
The estimate for potential underground mining consists of measures and indicated materials of 230,600 tonnes at 11.22 g/t gold, containing 83,200 oz. The inferred portion is 116,100 tonnes at 8.42 g/t gold, containing 51,200 oz.
The historic dumps are labeled as inferred having 78,800 tonnes at 2.95 g/t gold, containing 7,500 oz.
(This text first appeared within the Canadian Mining Journal)