Golden Mile Resources Expands Aurora Gold Zone to 280m Wide With Drilling Due Q1 2027
Key Takeaways
- Follow-up surface sampling has expanded the Aurora gold anomaly to at least 280 metres in width and 450 metres in strike length, materially larger than the footprint defined by the April–May 2026 programme.
- 55% of the 99 new channel samples returned greater than 0.1 g/t Au, with 34% exceeding the 0.25 g/t nominal cut-off and standout individual hits of 4.49 g/t and 3.08 g/t Au.
- The eastern and southern boundaries of the Aurora zone remain open, meaning the anomaly could be larger still — volcanic cover on the eastern side means only drilling can test what lies beneath.
- Aurora sits on genuinely undrilled ground immediately north of BHP's San Manuel-Kalamazoo Mine within the Laramide Porphyry Copper Province, a well-established Tier 1 mining district in Arizona (Fraser Institute No. 7 globally in 2023).
- Permitting for the inaugural drill programme is in progress, with drilling expected to commence in Q1 2027 and shareholder updates on the planned programme anticipated during the December quarter 2026.
Follow-up surface sampling at Golden Mile Resources (ASX: G88) has materially expanded the Aurora gold prospect at the Pearl Project in Arizona, with the interpreted anomalous zone now measured at least 280 metres in width and at least 450 metres in strike length. The company collected 99 additional surface channel samples and 5 grab samples during July 2026 as a follow-up to earlier April–May work, with 55% of channel samples returning greater than 0.1 g/t Au and 34% exceeding the nominal cut-off of 0.25 g/t Au. The western boundary of the Aurora zone has now been mapped with reasonable confidence, while the eastern and southern boundaries remain open.
What the latest assay results show
The April–May 2026 channel sampling programme established two standout lines across Aurora. Line 1, covering the southern zone, returned an average grade of 2.38 g/t Au over a strike width of approximately 126 metres, with both ends of the line finishing in anomalous gold at 0.34 g/t and 3.47 g/t. Line 2, which tested a narrower section of the central zone due to restricted outcrop, returned an average of 2.56 g/t Au over approximately 55 metres, also with anomalous gold at both ends at 3.33 g/t and 1.77 g/t.
The July follow-up programme was designed to define the western and eastern extents of the broader anomalous area. Sampling was conducted on a semi-random basis rather than along continuous lines, specifically to capture the true lateral boundaries of the prospect.
The April-May programme that produced exceptional gold grades at Aurora was itself the first systematic channel sampling across the prospect, establishing the two standout lines that the July follow-up was then designed to extend westward and eastward.
| Sample Line | Location | Average Grade (Au) | Strike Width | Status |
|---|---|---|---|---|
| Line 1 | Southern zone | 2.38 g/t | ~126 metres | Both ends anomalous |
| Line 2 | Central zone | 2.56 g/t | ~55 metres | Both ends anomalous |
| July follow-up | Western/eastern extents | Multiple hits >1 g/t | Zone-defining | Eastern boundary open |
Within the broader July programme results, several individual samples stand out for grade quality. Sample 26ACH101 returned 4.49 g/t Au, and sample 26ACH116 returned 3.08 g/t Au, both from outcrop and in-situ scree. These results sit within a programme where the majority of above-cut-off samples are broadly distributed across the zone, giving the high-grade hits geological context rather than reading as isolated anomalies.
Grant Button, Chairman
“These additional results from Aurora continue to build our confidence that we have an exciting drill target that, with further exploration success, has the potential to grow into a significant gold discovery. As I have cautioned previously, we are still at a very preliminary stage of exploration at Aurora but with each sampling exercise not only confirming previous sampling results but also expanding the areal extent of the anomaly, we approach further work with great optimism…”
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Understanding the Aurora target: what kind of deposit is this?
Aurora is being evaluated as a potential large-tonnage felsic-hosted gold deposit. In plain terms, that means the company is testing whether gold mineralisation extends broadly through the host granite rock itself, not just within the narrow quartz veins that were the original discovery signal. If the granite is auriferous across a wide area, the deposit could support bulk tonnage extraction at lower grades rather than being limited to high-grade vein material only.
Key geological points for investors to understand:
- The Oracle Granite (Precambrian age) is the primary host rock under evaluation. Earlier work focused on NNW-trending quartz vein sets within sheared and altered granodiorite; the current programme tests whether the surrounding granite also carries gold, which would significantly expand the potential resource footprint.
- The Cloudburst Volcanics, a sequence of late Oligocene volcanic and sedimentary rocks, unconformably overlie part of the eastern zone. Where this younger cover sits, mineralisation at depth may be concealed and untested by surface sampling.
- The eastern boundary of the Aurora zone remains open precisely because this volcanic cover limits what surface sampling can define. Drilling will be required to test what lies beneath.
- Arizona ranks No. 7 in the Fraser Institute’s 2023 Investment Attractiveness Index, confirming it as a Tier 1 mining jurisdiction.
The Pearl Project sits within the Laramide Porphyry Copper Province and is located immediately north of BHP’s San Manuel-Kalamazoo Mine, one of the larger deposits in the province. Importantly, the source announcement notes the project has never been drilled, meaning Aurora represents genuinely undrilled ground in a well-established mining district.
Pearl copper project results from earlier drilling have also demonstrated the province-scale potential of the broader tenement package, with the project positioned within the Laramide Porphyry Copper Province that hosts some of the region’s largest known mineralised systems.
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What comes next: permitting progresses toward inaugural drill programme
Surface sampling can map a prospect’s footprint, but drilling is what tests whether gold mineralisation continues at depth and at economic grades. For Aurora, the next material step is an inaugural drill programme, and Golden Mile has outlined the path to get there:
- Permitting approvals for the inaugural drill programme are currently in progress.
- Drilling is now expected to commence early in the first quarter of calendar 2027, with the extended timeline reflecting the time required to secure permitting approvals and drilling contractors.
- The company hopes to provide shareholders with updates on the planned drilling during the December quarter 2026.
- The eastern and southern boundaries of the Aurora zone remain open, meaning drilling will test both lateral extensions and depth continuity beyond what surface work can determine.
The Q1 2027 timing is a known variable in the programme schedule. What the expanding anomaly dimensions (280 metres width by 450 metres strike length) tell you is that the target Golden Mile is preparing to drill is materially larger than what was initially defined. Drilling will be the next genuine test of whether that surface footprint reflects something significant underground.
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