Sierra Madre Announces Test Mining Throughput in Excess of 425 Tonnes per Day at La Guitarra October 23, 2024 / Gambusino Prospector 2024-10-23 Sierra Madre, Test Mining. sierramadrego10232024-nrDownload Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like this:Like Loading...