Name and Location
Mt Carrington gold/silver project, New South Wales, Australia.

Client
White Rock Minerals.

Project Description
An updated scoping study on the Mt Carrington project has delivered a significant uplift in project economics.

The preferred processing flowsheet for the project will consist of:
• a central run-of-mine (RoM) pad, with an RoM bin and primary crusher fed by a front-end loader;
• a coarse ore stockpile, with a reclaim conveyor;
• a lime addition silo on the conveyor feeding the grinding circuit;
• a grinding circuit, requiring about 1800 kW of grinding power, possibly comprising a semiautogenous mill and ball mill, and a regrind ball mill of 200 kW to 250 kW;
• a flotation circuit to concentrate the gold and silver sulphides;
• a cyanide leach and carbon adsorption circuit;
• a standard elution and electrowinning circuit; and
• a gold room, a reagents area, a small lab and workshop.

In Year 3, the silver-dominant pits will be brought into the mine plan. Incremental capital will be spent on the flotation circuit to include a cleaner step, dewatering and concentrate production facility.

Net Present Value/Internal Rate of Return
The project has a net present value, at a 10% discounted rate, of A$60.6-million and a internal rate of return of 103% with a payback of ten months.

Value
The capital cost of the project is estimated at A$24.2-million.

Duration
The scoping study evisages an estimated 12-month design, build and commissioning period.

Latest Developments
White Rock estimates that the feasibility study will take 12 months.

This work will include process design testwork and flowsheet optimisation, mine plan (pit) optimisation and further engineering design and costings.

In parallel, the environmental-impact statement will be completed, allowing for permitting from the regulatory authorities to be acquired within 18 to 24 months.

Key Contracts and Suppliers
None stated.

On Budget and on Time?
Not stated.

Contact Details for Project Information
White Rock Minerals, email info@whiterockminerals.com.au.