The jachallera Gualcamayo mine experience this year a large quantum leap in the production of gold. During 2013, the number of ounces produced were 120,000, but in 2014 the number will reach 180,000 ounces, 50% more than what was produced last year. The data were recently confirmed by Emilio Roca, Production Manager of Minas Argentinas, a subsidiary of Yamana Gold, a major mining event held recently in the province of Salta.
In turn, the staff of the multinational explained that the figure of increase is very positive and is due almost entirely to the commissioning of the underground part of the deposit. However, he explained that “from now on”, you should pay special attention to costs because the site has little amount of gold on average and is located in a rugged terrain that requires very specific jobs.
According to official information from the website of Yamana Gold – Mining Argentina, in the underground portion of the deposit must mobilize a ton of rock to yield 2.5 grams of ore, while in his hand open pit ore grade is low, averaging 1 gram of ore per ton of rock removed.
The production manager also explained to the national media in 2012 147.000 gold equivalent ounces were produced and that last year the number fell to 120,000, while in 2014 will reach 180 thousand. “The plan is to repeat this figure for 2015, 2016 and 2017″. “Statistically Gualcamayo is a site that is on the verge of marginalization, if we are not efficient, we could not cover costs especially with the tax burden that exists in Argentina (the tax burden represents 52% of the business), up from Peru (45%), Australia (34.4%), South Africa (40.6%) and Chile (43 9%), “Rock explained. To understand clearly and without negative connotations the word “marginal” jachallera it is clear that the mine is in steep terrain where the law of mineral presence is not as abundant as in other parts of the country or province.
Daily reservoir moves 200,000 tons of mineral resources (including sterile and metals) of this mineral are between 15 000 and 18 000 tons that come with an average grade of one gram per tonne. The end product of all mining work Gualcamayo (bullion or ingot) is finally composed of 90% gold, silver 6% and 4% impurities.
The site uses technology from heap leaching to recover gold from crushed ore that is placed on a court where heap leaching is done with cyanide solution. Continue reading