Sierra Madre Begins Test Mining, Processing at Guitarra Mine

Sierra Madre Gold and Silver has launched test mining and processing at the Guitarra Mine Complex in Estado de Mexico. To date, the flotation plant has processed 5,698 dry t and is averaging 259 dry t/d, with plans to boost this to 500t/d by 4Q24.

“Since acquiring Guitarra on March 30, 2023, our team has been working diligently to restore the mine to full commercial operation. The start of test mining and processing is a significant milestone in this process,” stated Greg Liller, Executive Chairman and COO, Sierra Madre Gold and Silver.

The company reported that the flotation plant has been operating continuously since June 25, while stockpiling of development material began on June 20. In addition, current test mining utilizes long hole and shrinkage techniques, with plans to introduce cut-and-fill operations in the near future. 

The workforce comprises 188 employees, mostly from the local community. The company explained that many of these individuals are former Guitarra staff, contributing valuable experience and expertise to the project.

On May 25, 2022, Sierra Madre Gold and Silver signed an agreement with First Majestic Silver to fully purchase the La Guitarra mine. La Guitarra is a high-grade underground silver mine that produced plenty of silver in the past, with an extension of over 39,000ha. It produced over 1.5Moz/y of gold and silver between 2015 and 2018, when the mine stopped operations. Its current infrastructure includes two underground centers, La Guitarra and Coloso, as well as a 500t/d flotation mill and tailings facilities, among other features.