GreenTech Metals (ASX:GRE) 8.8g/t PGE hit sharpens Munni Munni bulk mining case

The first phase has done more than validate old data, it may change how investors view scale

GreenTech Metals has delivered a useful first phase result because it does two things at once.

It helps validate the historic Munni Munni dataset, and it also points to broader mineralised zones that previous exploration may not have fully captured. That second point is the more interesting one for investors.

GreenTech Metals (ASX:GRE) reported new infill drilling with some of the highest individual PGE3 grades seen at Ferguson Reef, including 8.8g/t PGE3 with 0.65% copper and 0.35% nickel. PGE3 refers to platinum, palladium and gold, which are the key precious metals reported in this part of the program.

The company is now preparing to reestimate the Munni Munni resource to JORC 2012 standard. If the new model can include broader PGE, copper and nickel zones using a net smelter return approach, the investment case could shift from a narrow reef story to a larger mining scenario.

New drilling supports more than just validation

The standout new RC result was 12m at 3.13g/t PGE3, 0.30% copper and 0.17% nickel from 90m, including 2m at 8.37g/t PGE3 from 98m.

Another hole returned 11m at 1.15g/t PGE3 from 116m, including 2m at 2.96g/t PGE3. Other results also showed shallow PGE, copper and nickel mineralisation across the Ferguson Reef.

This matters because GreenTech is not only confirming that the historic system exists. It is showing that shallow zones and wider envelopes may support a different development lens than the old high grade reef focus.

Copper and nickel could change the resource conversation

The historic resource used a 1.9g/t PGE cut off and largely focused on high grade PGE reef domains. That means copper and nickel outside those zones may not have received enough attention.

GreenTech’s new results suggest copper and nickel sulphide mineralisation exists above and below parts of the main PGE reef. In plain English, the company may have more payable metal in the surrounding rock than the old model recognised.

That is why the net smelter return approach matters. Instead of treating each metal separately, it can capture the combined economic value of PGEs, copper and nickel in a single resource framework.

Historic core is giving GreenTech a cheaper validation pathway

One practical advantage at Munni Munni is the preserved historic core stored on site. GreenTech resampled 16 historic holes, which helped validate historical data without having to redrill every area from scratch.

Selected results included 2m at 5.90g/t PGE3 from 107m in MMD117 and 4.5m at 2.67g/t PGE3 from 50.75m in MMD115.

That reduces time and cost, while giving resource consultants more data to support the JORC 2012 reestimate. The company expects the reestimated resource in June 2026.

The Investors Takeaway for GreenTech Metals

GreenTech’s update is more meaningful than a simple drill result because it supports both geological confidence and a possible change in development thinking.

The upside is that Munni Munni may become a broader PGE, copper and nickel system with shallow areas that could support bulk mining potential. That would be more valuable than a narrow historic reef narrative.

The risk is that the reestimated resource still needs to prove the broader zones are continuous, economic and mineable. The June resource update now becomes the key catalyst, because it should show whether these drill results translate into a larger and more investable base case. Investors can find more in depth coverage of ASX listed resources and critical minerals opportunities here at stocksdownunder.