The project was the first to be added to the US FAST-41 permitting process, and the company said it has the potential to be one of the world’s largest zinc producers.

In January, the company's mine operations generated 329,934 silver-equivalent ounces.

The company has set of guidance of 130,000-145,000 GEOs for the year.

The new zone remains open to the northwest, projecting towards the Homestake Main deposit.

The price of one gram of silver more than doubled in a year but at about 47 Egyptian pounds, it remains far cheaper than gold.

The new numbers represent a 1% increase in tonnage, but the overall grade increased by 11%.

An extra 5.9 million oz. of gold, 3.3 billion pound of copper, 55.4 million oz. of silver and 51 million lb. of molybdenum were added.

The life of the project has increased by two years, the silver production has increased almost 3 million oz., and the gold production has more than doubled.