Key highlights

• Legacy Minerals is assessing whether an optimised Scoping Study can support a larger Mining operation at Mt Carrington.

• Managing director Christopher Byrne discussed the work at the IMARC conference, following the September quarter report.

• This update covers gold equivalent and silver, drilling continuing, and the management claims in the study.

Legacy Minerals (ASX:LGM) is assessing whether its Mt Carrington Gold-Silver Project in northern New South Wales could support a larger mining operation. Managing director Christopher Byrne discussed the work in an interview at the IMARC conference, published on 31 October, following the company's September quarter report lodged with the ASX on 30 October.

According to the interview summary, Mt Carrington's updated mineral resource stands at 1.6 million ounces of gold equivalent, including about 714,000 ounces of gold and 35 million ounces of silver. An optimised Scoping Study is investigating how the expanded resource could support a larger production scenario.

What an optimised study would show

A scoping study is the first stage of economic assessment. It estimates possible production rates, Capital and operating costs and financial returns at a broad level of accuracy. An "optimised" study revisits an earlier case with updated inputs, in this instance a larger resource.

The answer to the headline question is that it could show whether scale improves Mt Carrington's economics. A bigger operation may lower unit costs and extend mine life, but it also usually requires more upfront capital and more extensive approvals. The study will indicate which trade-off the company prefers.

Scoping studies can include Inferred resources and carry significant uncertainty. They do not establish reserves or confirm that a project is economically viable.

Drilling continues

Exploration drilling is continuing around Mt Carrington, and copper-focused assays are awaiting laboratory results, according to the interview summary. Legacy is targeting completion of the optimised Scoping Study and results from two exploration drilling campaigns before the end of the December quarter.

Copper would add a further dimension to a project previously framed around gold and silver. Until assays are released, its significance cannot be judged.

Gold equivalent and silver

The 1.6-million-ounce figure is expressed as gold equivalent, combining gold and silver using price and recovery assumptions. Silver accounts for a large part of that total. Changes in the gold-to-silver price ratio can therefore alter the equivalent figure without any change in the deposit.

Precious metal prices have been volatile recently. Gold had fallen to a one-year low and silver had dropped 6%. Lower prices would be reflected in any updated economic study.

Management claims

Byrne's statements about resource size, drilling and timing are the company's own and should be checked against Legacy's ASX releases, including the quarterly report. Interviews are useful for understanding strategy, but they are not independent verification.

Location and history

Mt Carrington is a historical mining area in northern New South Wales. Brownfield projects can benefit from existing data and disturbed ground, but legacy environmental issues may also need to be addressed.

Company context

A larger development case would eventually require significant funding, likely including equity, Debt or a partner.

What to watch

Key items are the optimised Scoping Study, copper assay results and the two drilling campaigns due before year-end. Investors should also review the September Quarterly Report for cash and spending details.

Why scale matters for silver-gold projects

Precious metal projects with large silver components often depend on economies of scale, because silver is lower in value per tonne of ore than gold at typical grades. A larger plant can spread fixed costs over more tonnes, improving margins. That is the logic behind studying a bigger operation. The counterweight is capital intensity: larger plants cost more to build, and financing them can be harder for a small company. Legacy's optimised study should help clarify where that balance lies for Mt Carrington, and whether the expanded resource changes the project's likely scale. The study is due before year-end.