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December 2015 by Staff
Gold in Guyana—Part II: Process Optimization at Sacre Coeur Minerals' Lower Puruni Alluvial Mining Project
In Part Two of my two-part series I describe the mechanized alluvial gold mining operation on the lower Puruni River launched by Sacre Coeur Minerals in 2011.
They must have assumed the paystreak was spotty and had been mined out, so they never mined as close to the side of the valley as they should have.
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.
The solution focused on the relative difference in malleability between gold and waste, rather than the difference in density exploited by gravity circuits.
The Gold Eye placer claims, located in the La Cholla district of Arizona, are still producing some beautiful gold. From the days of the Spanish explorers and Mexican miners, men have tunneled into the earth in search of gold in this area.
Our testing over the past 15 years was to confirm or deny the USGS report completed in 1978. Besides the half acre test dig, we completed many additional test digs by hand and with the backhoe.
Silver recovery from low-level solutions is frequently done in a cell that has a cathode with 2 to 5 or more times the surface area as the anode.
The Bawl Mill • Ask The Experts • SB 838 and the Salem Witch Hunt • Small-Scale Hard Rock Production • Researching Mineralized Areas • MMAC & PLP Update • VLF Detector Operating Modes • Using Geologic Maps • Canadian Company Recovers 1,111-Carat Diamond • Lost Sally's Gold • Time to File Claims in Southern California • Colorado Disputes Key Part of EPA Mine Report • Picking Our Way Through Bedrock • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver