Name of the Project
Okiep Copper Project (OCP).

Location
Northern Cape, South Africa.

Project Owner/s
New Okiep Mining Company comprises Orion Minerals (56.25%) and the Industrial Development Corporation of South Africa, or IDC (43.75%).

Project Description
The OCP mineral tenement holdings of 702 km² covers the majority of the area where a total of 105-million tonnes is reported to have been mined in the district over the past 100 years.

A scoping study completed in May 2021 proposed a proof-of-concept-scale copper mining operation at the brownfield OCP, and confirmed that the project’s deposits have the potential to be mined at low cost using openpit and underground mining methods.

The outcome of the scoping study, based on five initial deposits (Flat Mines), supports the economic merit of developing a foundation-phase mining operation, while Orion conducts the required work and engineering studies to evaluate the potential to re-establish mining operations.

The life-of-mine (LoM) for the proof-of-concept foundation phase is modelled for 12 years, during which concurrent exploration and mine expansion scenarios will be planned and potentially implemented. 

The proposed foundation-scale mining operations could run at a design processing plant throughput of 780 000 t/y, resulting in 9 000 t/y of copper sold in marketable concentrates. This could potentially supplement the 23 000 t/y of copper production planned from Orion’s flagship Prieska Copper Zinc Mine (PCZM) .

Only mineral resources from the Flat Mines Area of the greater Okiep Copper Complex are incorporated in the foundation-phase plan, leaving significant potential for future expansion scenarios to be considered.

Underground and surface mining methods will be used in conjunction with mineral processing using conventional froth-flotation concentration to produce the copper concentrates for export.

The proof-of-concept phase of the proposed operation targets the development of only those Okiep copper deposits for which Orion has verified and reported mineral resources during the early phase of the due diligence period. The milled production target comprises measured mineral resources of 33%, indicated mineral resources of 46% and inferred mineral resources of 21%.

Potential Job Creation
Not stated.

Net Present Value/Internal Rate of Return
The scoping study for the project indicated a pretax net present value, at a 10% discount rate, of R1.9-billion and an internal rate of return of 44%, with a payback from first production of 3.25 years.

Capital Expenditure
Peak funding is estimated at R643-million in 2021 terms.

Planned Start/End Date
First production is possible within 16 months from the start of construction.

Latest Developments
Orion’s feasibility study on the OCP is on track for external review in mid-November and will incorporate confirmatory diamond drilling results that Orion published earlier in the September quarter.

Orion reported on October 23 that the OCP continued to deliver the highly anticipated extensions of previously intersected wide, high-grade copper mineralisation, "confirming the substantial upside of this project”.

The final assay results from the first drill hole have been completed to test down-dip continuity in a block of structurally uplifted high-grade copper mineralisation at Flat Mine South (FMS), which is part of the OCP.

The results have returned an intersection of 24.95 m at 4.14% copper within 59 m at 3.14% copper and confirm that high-grade copper mineralisation continues in an up-thrown and repeated fault block position.

"Importantly, the newly intersected mineralisation is at the foot of the proposed mine development planned for FMS, to extract the existing mineral resource,” MD and CEO Errol Smart has noted.

Orion has said that these latest results add further momentum to its development strategy for the OCP, building on the outstanding outcomes of a recently completed confirmation drilling programme, which confirmed the geology and endowment of the Flat Mines area, which includes FMS, Flat Mines East and Flat Mines North.

Key Contracts, Suppliers and Consultants
ABS Africa; Falcon and Hume Attorneys Inc; ALS Chemex (core sample analysis), Discovery Drilling; Rados; Geolabs and Sound Mining.

Contact Details for Project Information
Orion Minerals, tel +27 11 880 3159 or email info@orionminerals.com.au.