Newcore Gold has announced positive results from five additional column tests completed as part of the ongoing metallurgical program at the company’s 100%-owned Enchi gold project in Ghana.
An average gold recovery of 91.7% was achieved from column test work completed on three composite samples from the Sewum Gold Deposit and two composite sample from the Boin Gold Deposit.
Highlights from column test results
Five column tests completed, average gold recovery of 91.7% achieved
- A total of five column tests returned an average gold recovery of 91.7%, with a recovery range of 88.4% to 95.6%.
Test work further advances the understanding of processing options for Enchi
- Testing completed on representative samples of oxide mineralization from trenches.
- Crush size in testing in-line with modelled crush size for heap leach processing.
- Larger sized samples used in the columns with each sample weighing 30 kg.
Low reagent consumption
- All samples showed modest cyanide consumption with an average of 1.2 kg/t, with a 1.3 kg/t lime (hydrated) addition to maintain a pH above 10.5.
Additional Metallurgical Testwork Underway.
- Optimization work continues results from additional column tests to be completed on oxide mineralization from the Sewum, Boin, and Nyam gold deposits.
- A pilot heap bench-scale test is underway, to be completed in Q4,2023.
- Additional testing of sulphide mineralization from Sewum is in progress.
Greg Smith, VP Exploration of Newcore stated, “This additional set of column tests completed on representative oxide material from the Enchi gold project returned results that are consistent with prior results, returning high recoveries for all five composite samples.
“Metallurgical test work completed on oxide mineralization confirms the generally modest lime and cement consumptions. This work continues to highlight the amenability of Enchi to heap leach gold recovery and the favorable results will be incorporated into our PEA update scheduled for H1 2024.
“This test work was completed on samples from the two largest deposits currently identified on the Project, Sewum and Boin, which together compromise approximately 73% of the Mineral Resource Estimate. We continue to de-risk and advance the development of the Project with further metallurgical test work underway on both oxide and sulphide mineralization at Enchi.”