The new plan follows the confirmation of higher than expected copper grades at the upstream section of the deposit.
The first stage of the development will now use the surplus heavy media separation (HMS) plant from the company's Dikulushi Mine rather than building a new, larger HMS plant.
The company says that this will enable a more rapid development of the project and reduce development costs by more than 50%.
The revised model will provide sufficient copper oxide concentrate, grading about 30% copper, to justify development of a solvent extraction electro-winning facility to produce cathode copper for sale in the DRC.
The tailings deposit comprises mineralised material from a former washing plant operated at the Mutoshi Mine between 1960 and 1987, and discharged into the Kulumaziba watercourse. Recent sampling of the narrower first 7,5 km of the deposit to a depth of three metres has outlined an inferred mineral resource of 1,5-million tons at 6,8% copper using a top cut of 11,5% for about 102 000 t of contained copper.
“The revised development plans for the starter-project on the Kulumaziba deposit will provide the company with a sizeable stream of oxide copper concentrates that would justify examining downstream processing options,” commented Bill Turner, president and CEO of Anvil.
“This is the direction in which we have always wanted to move with our new oxide copper projects in the DRC Copperbelt. The combination of higher than expected resource grades and readily available plant make the decision rather straightforward.”