Koba Resources’ recent IP survey at the Stannex Prospect reveals robust chargeability anomalies aligned with high-grade tin mineralisation, setting the stage for an imminent 3,000m drilling campaign.
- IP survey confirms strong lateral and depth continuity of mineralisation
- Chargeability anomalies correlate with tin-in-soil and rock chip assays
- Maiden 3,000m drill program to test refined high-priority targets
- Bipole-Dipole IP technique validated as effective exploration tool
- Drilling planned across multiple Queensland tin-tungsten prospects
Robust Geophysical Signal Boosts Confidence at Stannex
Koba Resources Limited (ASX:KOB) has completed a detailed Induced Polarisation (IP) survey over the Stannex Prospect, part of its 100%-owned Mt Garnet Tin-Tungsten Project in North Queensland. The results reveal strong chargeability anomalies that closely match previously identified high-grade rock chip samples and tin-in-soil geochemical anomalies, suggesting a substantial and continuous mineralised system.
These chargeability anomalies extend laterally over more than 2 kilometres and reach depths exceeding 250 metres, indicating significant scale potential for the tin-tungsten mineralisation. This geophysical validation sharpens the company’s drill targeting, providing a clear framework for the upcoming maiden 3,000-metre drilling campaign scheduled to commence imminently.
Bipole-Dipole IP Survey Delivers High-Resolution Data
The June survey employed a Bipole-Dipole (BDIP) technique across five lines spaced 400 metres apart, covering approximately 6.4 line kilometres. This method, new to the Mt Garnet Project, measured both chargeability and resistivity down to around 250 metres depth. The strong correlation between the IP chargeability anomalies and surface geochemical indicators; rock chips grading up to 21.3% tin and high-tenor tin-in-soil anomalies; reinforces the prospectivity of the Stannex target.
According to Managing Director Ben Vallerine, the IP results have provided “greater confidence in the scale and quality of the targets,” highlighting the lateral continuity and depth extent of mineralisation. The survey has effectively refined and prioritised drill targets ahead of the maiden drilling program, which will also test nearby Gilmore Prospect.
Drilling Campaign and Broader Exploration Pipeline
The imminent 3,000-metre drilling program marks a critical step in advancing Koba’s tin-tungsten portfolio. The program will initially focus on Stannex and Gilmore within the Mt Garnet Project, with subsequent drilling planned at the Kitchener and Jiminy Prospects in the Stannary Hills Tin-Tungsten Project during Q3.
Additional assay results from a recent tungsten-focused rock chip sampling campaign at Mt Garnet are expected in July, which will further inform the project's tungsten potential. The integration of geophysical, geochemical, and historic data into 3D models aims to underpin resource definition efforts.
Historical Context and Technical Validation
While the Stannex area has seen limited historic drilling; only six holes in the 1970s; the recent IP survey represents a significant technical advancement. The Bipole-Dipole method has proven effective in delineating chargeability anomalies associated with tin-tungsten mineralisation, often linked to sulphide minerals like pyrite. This geophysical approach complements traditional surface sampling, providing a more comprehensive subsurface picture.
Koba’s strategy to combine these modern geophysical techniques with targeted drilling could unlock a substantial resource, although confirmation awaits assay results from the upcoming drill holes. The company’s methodical approach reflects a broader trend in tin-tungsten exploration, where integrating multiple datasets enhances targeting precision.
Bottom Line?
Koba’s IP survey success at Stannex sets a solid foundation for drilling, but the real test will come with assay results that confirm the scale and grade of the mineralisation.
Questions in the middle?
- Will the maiden drilling confirm the lateral and depth continuity suggested by the IP anomalies?
- How might upcoming tungsten assay results influence Koba’s project prioritisation and resource estimates?
- Can the Bipole-Dipole IP technique be effectively scaled across other prospects in Koba’s portfolio?