Tin & tungsten prospectivity
across Australia, the USA & Canada.
Granite-related tin and tungsten, ranked and explained — validated nationally across three countries.
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What the model reads for tin & tungsten.
Every tin & tungsten target is scored on the same seven lines of evidence — with a pathfinder-geochemistry signature tuned to this system.
Host rock
rock type and age
Gravity & magnetics
buried structures and intrusions
Radiometrics
potassium, thorium, uranium
Terrain shape
elevation, slope, aspect
Surface texture
radar (Sentinel-1)
Alteration
mineral signatures from satellite
Pathfinder chemistry
the elements that point to your commodity
Pathfinder geochemistry the model weighs
Lead signal: The granophile suite — lithium, rubidium, caesium, tantalum and niobium. These are the elements this national model actually reads to rank tin & tungsten ground.
What is tin & tungsten?
Tin and tungsten are the classic hard-metal pair of the felsic-intrusion world, so closely linked geologically that explorers routinely hunt them together. MineDSS focuses on granite-related tin and tungsten systems — mineralisation sourced from highly evolved, volatile-rich granitic melts. As these fractionated granites cool, tin (in cassiterite) and tungsten (in wolframite and scheelite) concentrate in the residual fluids and are deposited in and around the pluton: in greisenised cupolas, sheeted vein and stockwork arrays, quartz-wolframite veins, and reactive skarns where fluids meet carbonate wall rock. These systems carry a distinctive, chemically evolved footprint far larger than the ore itself — and that footprint is what a prospectivity model learns to read.
The deposit model
Granite-related tin and tungsten systems sit in and above the apical zones of evolved, reduced to weakly oxidised felsic intrusions, commonly S-type granites emplaced in deformed metasedimentary terranes. Tin favours greisen — a quartz-mica-topaz-fluorite assemblage produced by fluids altering the granite cupola — plus sheeted cassiterite-bearing veins and stockworks. Tungsten occurs as wolframite in quartz vein swarms and as scheelite in skarns developed where fluids react with carbonate country rock. Greisenisation, tourmalinisation and sericitic alteration mark the system, and the granophile pathfinder association is diagnostic. MineDSS reads these settings through mapped geology and rock age, gravity and magnetic structure that images buried intrusions, radiometrics sensitive to fractionated granites, terrain, satellite alteration and the pathfinder geochemistry below.
Why it matters
Tin and tungsten are strategic industrial metals that both sit on major economies' critical-minerals lists. Tin is fundamental to the electronics that underpin electrification and the digital economy, while tungsten's extreme hardness and heat resistance make it difficult to substitute in tooling, defence and high-performance applications. Supply for both is geographically concentrated and exposed to processing bottlenecks, which keeps Western governments and manufacturers focused on securing new, diversified sources — sustaining exploration interest across established and frontier granite provinces.
Where it's used
Tin's dominant use is solder — the joints binding virtually every printed circuit board and electronic assembly — alongside tinplate, chemicals and specialty alloys. Tungsten's exceptionally high melting point and hardness make it essential in cemented carbides for cutting and mining tools, wear-resistant components, filaments and electrodes, and heavy alloys used in aerospace and defence. Both metals sit at the heart of modern manufacturing supply chains.
How MineDSS reads it
MineDSS weighs a full granophile pathfinder suite — molybdenum, bismuth, arsenic, copper, lead, beryllium, and the fractionation indicators lithium, rubidium, caesium, tantalum and niobium — alongside geophysics and satellite alteration. The lithium-rubidium-caesium-tantalum-niobium association tracks how chemically evolved a granite is, a key control on tin-tungsten fertility. Reading these lines together means a ranked target reflects the whole mineralising system — the fertile intrusion, its alteration and its geochemical halo — rather than a single anomalous sample.
Tin & tungsten prospectivity — common questions
Which tin and tungsten deposit types does MineDSS model?
MineDSS models granite-related tin and tungsten systems — mineralisation sourced from evolved, volatile-rich felsic intrusions. In practice that spans greisen and sheeted-vein tin around granite cupolas, quartz-wolframite vein swarms, and scheelite-bearing skarns where magmatic fluids react with carbonate wall rock. All share the same fractionated-granite parentage and the diagnostic granophile geochemical footprint the model is trained to recognise.
How is the model's accuracy measured?
We validate every model the hard way — held-out spatial cross-validation. We hide known deposits, rebuild the model without them, then test whether it still finds them, with test blocks kept spatially separated so it cannot memorise nearby points. We are currently refreshing our published national skill figures so they reflect deployment-time performance, and will republish them per model. Coverage today spans Australia, the United States and Canada; the figures are model-level skill, never a specific site's measured accuracy, and never a discovery or JORC / NI 43-101 resource claim.
Why does the model read elements like lithium, tantalum and niobium?
Here they are pathfinder and associated elements, not commodities MineDSS ranks. Lithium, rubidium, caesium, tantalum and niobium track how chemically evolved a granite is — the fractionation that governs whether an intrusion is fertile for tin and tungsten. Reading them helps the model distinguish prospective evolved granites from barren ones; they are geological evidence, not coverage.
Does a high MineDSS score mean there is a deposit?
No. A high score means the ground shares the geological, geophysical and geochemical characteristics of known granite-related tin-tungsten systems, so it ranks as more prospective and warrants further work. It is a prioritisation of where to look — not a discovery, not a JORC or NI 43-101 resource or reserve estimate, and not drilling or investment advice. Ground truth still requires field verification and drilling.
Other commodities we model
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