Great Northern Minerals has secured permits and a drilling contractor for an approximately 2,000 metre maiden RC campaign at Iron Butte, where four undrilled chargeability anomalies sit around an existing inferred resource. Douglas Creek has also produced three or more new targets, but both projects remain at the exploration stage and will need drilling to validate the geological interpretations.
- Iron Butte drilling targeted for early November 2026
- Four new DDIP chargeability anomalies prioritised across a 3km target area
- Existing Iron Butte resource contains 480,000 oz of gold and 11.5Moz of silver
- Douglas Creek soil and stream sediment assays expected in November
- $3.13 million cash at quarter end, equivalent to 5.44 quarters at the reported outflow rate
Iron Butte Moves From Targeting to Drilling
Great Northern Minerals Limited (ASX:GNM) is set to put its most important exploration thesis to the test, with permitting complete, the required bond accepted and an experienced Nevada contractor engaged for maiden reverse circulation drilling at Iron Butte. Road and drill-pad construction is under way, with the approximately 2,000 metre campaign scheduled to begin in early November 2026.
The program will test whether the existing Iron Butte system extends along strike and at depth, including the possibility of deeper Carlin-style gold and silver mineralisation. That prospect is supported by a prior diamond-drill intersection of 1.5 metres at 13.5 grams per tonne gold and 11.5 grams per tonne silver from 405.4 metres, although the company has drilled only two deeper diamond holes to date.
The campaign follows the identification of four new undrilled DDIP chargeability anomalies across a roughly 3km target area. The four Iron Butte IP targets include a central anomaly beneath the existing resource, a northern target associated with elevated gold and silver in soil and rock, a southern anomaly below holes that ended in mineralisation, and the Caetano target northeast of the resource.
A Resource With Depth and Strike Upside
Iron Butte’s maiden JORC 2012 inferred resource comprises 37.85 million tonnes at 0.4 grams per tonne gold and 6 grams per tonne silver, containing 480,000 ounces of gold and 6.7 million ounces of silver. A separate silver-only inferred resource contributes another 4.8 million ounces, taking the stated silver inventory to 11.5 million ounces. The central mineralised zone measures about 500 metres by 300 metres, runs from surface to 200 metres depth and remains open in all directions.
That gives the drilling a clear job, rather than merely a collection of geophysical curiosities: test extensions around a defined resource and probe the largely untested ground below it. The anomalies are described as potentially representing disseminated sulphide linked to gold and silver mineralisation in fresh rock. They are targets, not discoveries, and the economic significance will depend on what the RC holes actually intersect.
Douglas Creek Adds a Second Exploration Thread
At Douglas Creek in North Queensland, a DDIP survey and magnetic inversion have outlined at least three undrilled chargeability anomalies around an interpreted reverse-polarised tonalite body measuring about 1.5km by 500m and extending to an interpreted depth of roughly 1km. The company says the features coincide with surface geochemistry and, in places, exposed mineralisation. Earlier coverage described the same Douglas Creek magnetic targets as being supported by surface results including rock samples grading up to 13.6 grams per tonne gold.
Terra Search has completed follow-up soil sampling over the southern IP anomaly and stream sediment sampling around similar magnetic features to the north. Samples are with ALS in Townsville, with results expected in November. Great Northern intends to rank drill targets after the assays and begin permitting for drill testing after the 2026-27 wet season, leaving Douglas Creek behind Iron Butte in the near-term timetable.
Cash Position Leaves Drilling as the Next Financial Test
GNM ended September with $3.13 million in cash and reported a quarterly net operating cash outflow of $576,000, including $287,000 of exploration and evaluation expenditure and $328,000 of administration and corporate costs. On that reported outflow, the Appendix 5B calculates 5.44 quarters of funding. That estimate does not incorporate the potentially higher spending profile associated with the planned drilling campaign, further permitting or later Douglas Creek work.
Catalyst Ridge in California remains a longer-dated permitting and targeting exercise. GNM is progressing a mineral prospecting permit and plans future DDIP surveys before any drill program is mobilised. The immediate valuation question is therefore concentrated at Iron Butte: whether November drilling can convert a persuasive set of geophysical targets and a promising deep intersection into repeatable mineralised intervals.
Bottom Line?
Early November Iron Butte drilling is the key near-term catalyst, but the cash runway should be reassessed once the company reports the campaign’s actual pace and cost.
Questions in the middle?
- Will the approximately 2,000 metres of Iron Butte RC drilling intersect mineralisation beyond the current inferred resource?
- Will Douglas Creek’s November soil and stream sediment results strengthen the case for drilling after the wet season?
- How much will the Iron Butte campaign and subsequent project work draw down GNM’s reported 5.44-quarter cash estimate?