Kali Metals Ltd
- ASX Code: KM1
- Market Cap: $14,162,151
- Shares On Issue (SOI): 0
Kali Metals Uncovers High-Grade Tin-Tungsten System at Mt Cudgewa, Setting the Stage for a Maiden Drill Campaign
The Kali Metals Mt Cudgewa tin tungsten discovery in Victoria has drawn considerable attention following the release of a significant surface exploration outcome at its 100%-owned Tallangatta Project. Mapping and sampling have identified a substantial hard-rock tin and tungsten mineral system at the Mt Cudgewa Prospect, with rock-chip results of up to 6.00% SnO₂ and 0.38% WO₃ from a mineralised zone spanning 1.7km in strike length and 250m in width, positioning this target as one of the company's more compelling near-term drilling candidates.
"Our initial fieldwork has identified a substantial extensive mineral system characterised by dense swarms of mineralised veins, extending over a 1.7km strike," said Paul Adams, Managing Director of Kali Metals.
When big ASX news breaks, our subscribers know first
A Hard-Rock Discovery Hidden Beneath a Century of Alluvial History
Mt Cudgewa carries a long mining history. Alluvial tin workings operated at the site from 1873 to 1919, though the hard-rock source feeding those workings had never been systematically targeted with drilling, according to the company's announcement.
Kali's geologists have now mapped a primary tin-tungsten mineral system located approximately 200m south of those historical alluvial workings, a finding that repositions the prospect from a historical mining site into an active hard-rock exploration target.
The mineralised zone is reported to host approximately ten discrete zones, each containing multiple quartz veins ranging from 0.2 to 0.5 metres wide. The density and spatial extent of this vein swarm is considered by the company to signal a well-developed hydrothermal system — the type of geological setting associated with tin-tungsten deposits found elsewhere.
The Numbers That Matter: Rock-Chip Sampling Results
Of the 17 rock-chip samples collected at Mt Cudgewa to date, several returned grades considered high-quality by industry standards. The table below summarises the standout results from the announcement:
| Sample ID | SnO₂ (%) | WO₃ (%) | Notes |
|---|---|---|---|
| MCR016 | 6.00 | 0.01 | Highest tin result; visible cassiterite in white quartz |
| MCR012 | 2.15 | 0.38 | Highest tungsten result |
| MCR013 | 1.70 | 0.02 | Strong tin grade |
| MCR015 | 1.24 | 0.04 | Above-background tin |
| MCR011 | 0.93 | 0.12 | Tin with notable tungsten credit |
| MCR017 | 0.99 | 0.11 | Consistent tin-tungsten association |
| MCR010 | 0.65 | 0.18 | Significant tungsten credit |
At the nearby Mildren Prospect, three rock-chip samples were collected during a brief site visit. Two of the three returned tungsten grades exceeding 0.1% WO₃, which the company states warrants further investigation at that location.
It should be noted that rock-chip samples are point samples and are not representative of overall or average grade across a mineral system. According to the announcement, they remain a valuable tool for identifying mineralised targets and guiding follow-up work, but should not be relied upon as an indicator of resource-scale grade continuity.
Soil Sampling Adds Scale: Anomalism Extends Beyond Known Outcrops
While the rock-chip results confirm high-grade mineralisation at surface, the soil sampling programme is building a case that the broader system may be more extensive than what is currently exposed at outcrop.
Of the 880 planned soil samples, 480 have been collected across the wider Mt Cudgewa area using a ridge-and-spur sampling methodology. Sample spacing was designed systematically, according to the report:
- 50m centres over areas with previous workings
- 100m spacing in transitional zones
- 200m spacing in areas where mineralisation is considered less likely
Key findings from the soil programme reported to date include:
- Tin and tungsten anomalism confirmed over known mineralised occurrences
- A sub-parallel tin soil anomaly identified approximately 500m south of Mt Cudgewa, suggesting potential extensions of the system
- Broad, strong tin soil anomalies identified over granitoids to the west of Mt Cudgewa, interpreted by the company as a likely primary source of the mineralisation
- Anomalism extending to the east, indicating the system may remain open in multiple directions
The remaining 400 soil samples are expected to be collected once the programme recommences in September, following the current wet-weather season, the company stated.
Understanding Cassiterite and Why It Matters
What Is Cassiterite?
Cassiterite (SnO₂) is the primary ore mineral of tin, appearing as a dark, dense mineral visible in the rock-chip photograph from sample MCR016. It typically occurs in quartz veins, greisen bodies — rocks formed by hydrothermal alteration of granite — and pegmatites associated with highly evolved granites.
Its high density makes it identifiable in the field and an effective indicator mineral in alluvial systems, which explains why historical miners recovered tin from streams draining Mt Cudgewa for nearly five decades.
Why Does It Matter to Investors?
Identifying cassiterite in hard-rock quartz veins at surface, with grades up to 6.00% SnO₂, suggests the primary source of historical alluvial production may now have been located. If the vein system demonstrates depth continuity — something that can only be confirmed through drilling — the project's economic potential could be material.
Tin is a critical mineral used extensively in electronics and soldering applications, and global supply remains concentrated in a limited number of producing countries. Furthermore, the dual presence of tungsten adds additional commodity significance, as both metals are classified as critical minerals across multiple jurisdictions.
Glossary of Key Terms
| Term | Definition |
|---|---|
| SnO₂ | Tin oxide; the chemical formula for cassiterite, the primary tin ore mineral |
| WO₃ | Tungsten trioxide; the oxidised form used to express tungsten grade |
| Greisen | Rock formed by hydrothermal alteration of granite, often associated with tin and tungsten mineralisation |
| Rock-chip sample | A surface point sample collected from outcrop; not representative of average grade |
| Soil anomaly | An area where element concentrations in soil exceed background levels, indicating possible mineralisation at depth |
| LiDAR | Light Detection and Ranging; high-resolution aerial imagery used to map topography and identify subtle geological features |
| Ridge-and-spur sampling | A soil sampling methodology that follows topographic highs to capture residual mineralisation |
What Comes Next: A Defined Six-to-Nine Month Roadmap
According to the announcement, Kali's exploration team has outlined a structured plan for advancing Mt Cudgewa from a surface discovery toward a drill-ready target over the next six to nine months.
| Activity | Detail | Timeline |
|---|---|---|
| Soil sampling completion | Remaining approximately 400 samples from the 880-sample programme | From September 2025 |
| Extended geological mapping | Wider Mt Cudgewa and Mildren areas | Ongoing |
| Additional rock-chip sampling | Targeting new vein zones and extensions | Ongoing |
| LiDAR imagery acquisition | Approximately 350km² of high-resolution topographic data | Near-term |
| Permitting | Track clearing, trenching and/or drill pad approvals | Progressing |
| Trenching and inaugural drilling | Maiden drill campaign, pending data and permits | Following completion of above steps |
The LiDAR acquisition is considered a notable step in this process. High-resolution topographic data is expected to help the team identify subtle structural features and plan fieldwork more effectively across terrain that is largely vegetated, potentially revealing additional vein corridors not currently accessible on foot.
The Investment Case: Factors Relevant to Mt Cudgewa
Several factors from the announcement combine to make the Kali Metals Mt Cudgewa tin tungsten discovery in Victoria relevant to shareholders and critical minerals investors alike.
High-Grade Surface Results
A peak result of 6.00% SnO₂ from a surface rock-chip sample represents a high-grade outcome at surface. Combined with 0.38% WO₃ from an adjacent sample, the tin-tungsten association across the vein system points to a mineralogically active hydrothermal setting.
Scale and Historical Context
A mineralised corridor measuring 1.7km long by 250m wide, hosting approximately ten discrete vein zones, indicates a system with meaningful lateral extent. The soil sampling programme is already pointing to possible extensions, particularly to the east and south.
In addition, alluvial tin mining conducted between 1873 and 1919 at the Cudgewa workings provides historical evidence that the area is tin-bearing. The hard-rock source now identified by Kali had not previously been drilled, according to the company, meaning this represents a genuinely new target within a historically mineralised district.
Dual-Commodity Exposure and Tenement Ownership
The presence of both tin (SnO₂) and tungsten (WO₃) across the system adds commodity diversification. Both metals are classified as critical minerals in multiple jurisdictions due to their applications in electronics, defence and energy-related technologies.
The Tallangatta Project covers 611km² across multiple tenements in Victoria, all 100% owned by Kali. The broader Southern Lachlan Fold Belt tenure spans 1,523.8km² across Victoria and New South Wales, providing considerable further exploration ground.
A Sequenced Path Toward Drilling
The combination of surface sampling, LiDAR acquisition, geological mapping and permitting work is being carried out in a defined sequence intended to support a maiden drill campaign. Management has indicated this process is expected to unfold over the next six to nine months, providing investors with a reasonably clear timeline.
The next major ASX story will hit our subscribers first
Why Investors May Continue Watching Kali Metals
Kali Metals enters this phase of exploration with a defined target, a high-grade surface result as an initial data point, and a systematic programme designed to build the case for drilling. The Kali Metals Mt Cudgewa tin tungsten discovery in Victoria has consequently moved from a historical mining footnote to an active exploration focus.
Additional rock-chip assays, the remaining 400 soil samples, and LiDAR data represent upcoming data releases that could further define the system's scale. The company's broader portfolio, spanning gold, lithium and critical minerals across more than 4,029km² of tenure in Western Australia and the Southern Lachlan Fold Belt, provides additional exploration exposure beyond the Tallangatta Project.
Key Takeaway: Kali Metals (ASX: KM1) has identified a tin-tungsten mineral system at Mt Cudgewa that has not previously been drilled, supported by surface results of up to 6.00% SnO₂ across a 1.7km mineralised corridor. With soil sampling indicating possible extensions in multiple directions and a structured six-to-nine month roadmap toward an inaugural drill campaign, this discovery represents an area of continued interest for investors monitoring critical minerals exploration in Australia.
Want to See What Kali Metals Has Uncovered at Mt Cudgewa?
Kali Metals (ASX: KM1) has identified a high-grade tin-tungsten mineral system spanning a 1.7km corridor at its 100%-owned Tallangatta Project — a target that has never been drilled. With surface results of up to 6.00% SnO₂, a structured roadmap toward a maiden drill campaign, and soil sampling pointing to potential extensions in multiple directions, this is a project worth following closely. Watch the company's latest update and explore the Mt Cudgewa discovery in greater detail by heading to the link below.
Click Here to Learn More About Kali Metals and the Mt Cudgewa Project →
