Red Dog — Alaska, USA
Testing whether sulphide-targeting criteria developed on Australian drill control transfer to a world-class Zn–Pb district in Alaska.
Can a sulphide signature transfer between sites?
The Red Dog work formed part of a wider test: develop sulphide-selection criteria using Australian drill-controlled scans, then apply those criteria to independent geology in Alaska.
At scan AN810, the 9–16 MHz frequency response showed a dip at approximately the same depth as the drill-recorded sulphide occurrence. At AN944, a multi-evidential interpretation using energy and frequency criteria identified the pyrite-rich Ikalukrok Fe-sulphide zone at approximately 650–700 m.
The value of this case is not a claim of grade prediction. It is the evidence that an ADR response developed across one set of sulphide-bearing rocks could be tested against a separate Zn–Pb system and compared directly with drill information.
Multiple measurements. One geological question.
Cross-site criteria
Selection criteria developed from Australian sulphide scans were carried into the Red Dog analysis rather than being invented independently for each Red Dog hole.
AN810 drill comparison
The 9–16 MHz frequency results show a response at approximately the same depth as the sulphide occurrence in the drill data.
AN944 pyrite zone
The combined evidence interpretation aligns with the mapped and drilled Ikalukrok pyrite-rich interval at roughly 650–700 m.
At Red Dog, the ADR interpretation aligned with independently known sulphide intervals.
The strongest website-ready result is AN944: after applying the multi-evidential correlation and comparing it with assay and drill interpretation, the study reports that the correlation identified the pyrite zone. AN810 provides a second line of evidence, with frequency behaviour at approximately the depth of the sulphide occurrence.
ADR is presented here as a sulphide-targeting and subsurface-characterisation method. These results do not demonstrate direct prediction of Zn or Pb grade, tonnage, resource size or economic value. Depth and interpretation uncertainty remain part of the result.
Could ADR add another evidence layer before your next drill decision?
Start with the project, the existing geology and the decision you need to make. VEXRAD will tell you where ADR may add value — and where it may not.
Start a Project Fit Check →More Insights & EvidenceWhat could ADR show at your target?
Every geological setting is different. This case study demonstrates evidence from a particular project; it does not guarantee the same result elsewhere.
If you have a target, existing geoscience or a proposed drill location, start with a free VEXRAD Project Fit Check. We will review whether ADR appears technically relevant before recommending further work.
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