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Newcore’s Enchi in Ghana amenable to heap leaching

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Newcore Gold’s Enchi project is located in the south-west of Ghana. Image credit: Newcore Gold

Newcore’s Enchi in Ghana amenable to heap leaching

Additional column tests at TSX listed Newcore Gold’s Enchi Gold Project in Ghana highlighted the amenability of Enchi to heap leach gold recovery.       

The Enchi Gold project is in the south-west of Ghana, Africa’s largest gold producer. The Project currently hosts an Inferred Mineral Resource of 1.41 million ounces of gold at 0.62 grams per tonne (g/t).

Enchi’s is a 216 km2 land package that covers 40km of Ghana’s prolific Bibiani Shear Zone, a gold belt which hosts several five- million-ounce gold deposits, including the Chirano gold mine, about 50km to the north.

According to Greg Smith, VP Exploration of Newcore, the additional set of column tests completed on diamond drill core material from Enchi returned consistent results with high recoveries for all three composite samples.

“This highlights the amenability of Enchi to heap leach gold recovery. These samples are representative of the oxide and transitional material from the two largest deposits, Sewum and Boin, which together currently comprise approximately 87% of the Enchi Inferred Mineral Resource Estimate,” says Smith.

Smith says that these samples were much coarser than material used for previous testwork and were more in line with the parameters of the Preliminary Economic Assessment completed in 2021.

“The coarser material resulted in a series of positive benefits including continued excellent recoveries, lower required reagent levels for lime and cement and lower cyanide consumption and slumping,” says Smith.

The three additional column tests were completed as part of the ongoing metallurgical program at Enchi. An average gold recovery of 92.4% was achieved from column testwork completed on two composite samples from the Sewum Gold Deposit and one composite sample from the Boin Gold Deposit.

Material for metallurgical testing (Newcore’s Enchi in Ghana amenable to heap leaching)

The three samples were submitted for column testwork to the Intertek Lab located in Tarkwa, Ghana, approximately four hours by paved road from the Enchi Gold Project.

Material for the metallurgical samples consisted of half diamond drill core from holes drilled specifically to collect material for metallurgical sampling.

The samples were selected to represent the two largest deposits on the Project, Sewum and Boin, and consisted of blended oxide and transitional material. For each deposit, individual samples included a range of gold grades and weathering intensities.

Enchi Drill Program (Newcore’s Enchi in Ghana amenable to heap leaching)

A 5,000m discovery and resource expansion drill program, following up on the success achieved to date from drilling at Enchi, commenced in Quarter 3 of 2022.

According to Smith diamond drilling will focus on continuing to define the higher-grade sulphide mineralisation at depth with a goal of delineating the potential for high-grade underground resources at Enchi.

Reverse Circulation (RC) drilling will target near-surface oxide and shallow sulphide mineralisation with a goal of outlining additional resource growth along strike and depth at all deposit areas.

RC drilling will also be planned to follow-up on discoveries made as part of the recently completed 90,000m drill program. Additional exploration work is also on-going, including metallurgical testwork and trenching of high-priority surface anomalies.

Discovery drilling completed in Q2 (Newcore’s Enchi in Ghana amenable to heap leaching)

A 90,000m discovery and resource expansion drill program (commenced in August 2020) was completed at Enchi in Quarter 2 of 2022.

The program included both RC and diamond drilling and included the first deeper drilling on the Project.

Newcore’s multi-pronged exploration approach delivered on the goals set out at the start of drilling:

  • Successfully outlined potential resource growth along strike at all four existing deposits (Sewum, Boin, Nyam, Kwakyekrom);
  • Encountered strong results at previously drilled zones that are outside of the resource area (Kojina Hill and Eradi);
  • Drilling intersected high-grade at depth which has outlined the potential for underground resources and
  • Identified new discoveries from successful first pass drilling on early stage kilometre-scale gold-in-soil anomalous targets (Sewum South, Tokosea).

The total planned drill program consisted of 575 holes representing 92,583m.

Newcore’s Enchi in Ghana amenable to heap leaching

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Newcore’s Enchi in Ghana amenable to heap leaching

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