Tungsten prospectivity
across the USA & Canada.
Skarn, vein and greisen tungsten, ranked and explained — validated across the USA and Canada.
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What the model reads for tungsten.
Every 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: Tin, bismuth and molybdenum. These are the elements this national model actually reads to rank tungsten ground.
What is tungsten?
Tungsten is a refractory transition metal, chemical symbol W after its historic name wolfram, prized for the highest melting point of any metal together with exceptional density, hardness and heat resistance. In nature it is won almost entirely from two ore minerals: scheelite, a calcium tungstate, and the wolframite series of iron-manganese tungstates. Both crystallise from volatile-rich fluids expelled by cooling granitic intrusions, and MineDSS models tungsten through three seeded deposit systems: skarn, vein and greisen. Each is tied to felsic intrusions, hydrothermal alteration and structurally focused mineralisation, and each leaves a mappable footprint — altered and veined intrusive and carbonate rocks, characteristic geophysical responses over concealed granites, and a distinctive granophile multi-element geochemical halo that a prospectivity model is built to read across large, partly covered terrains.
The deposit model
All three seeded systems descend from the same source: fractionated, volatile-rich granitic magmas that expel tungsten-bearing hydrothermal fluids as they cool. Skarn deposits form where those fluids invade carbonate country rock beside an intrusion, replacing it with coarse calc-silicate assemblages in which scheelite is deposited, commonly in the classic reduced tungsten skarns whose retrograde alteration adds fluorine, silica, tin and bismuth. Vein systems concentrate wolframite in quartz veins that radiate from granite cupolas, from centimetre-scale sheeted swarms to metre-wide structures traceable for hundreds of metres. Greisen systems represent the altered, muscovite-quartz-topaz tops of late-stage granites, carrying wolframite and scheelite alongside cassiterite. MineDSS reads these settings by combining mapped intrusive and carbonate geology and structure, geophysical signatures of buried plutons, skarn and alteration, satellite-derived indications of altered and weathered ground, and the pathfinder geochemistry that trails a mineralising system, ranking ground by its resemblance to well-characterised skarn, vein and greisen tungsten settings.
Why it matters
Tungsten is a strategic industrial metal and appears on the critical-minerals lists of several major economies, reflecting both its irreplaceable industrial roles and a concentrated supply base. Its combination of extreme hardness, density and thermal stability underpins cutting tools, defence hardware and semiconductor manufacturing, where viable substitutes are scarce. Supply is unusually concentrated: a single country accounts for roughly four-fifths of mined output, and recent export-licensing measures have tightened an already narrow pipeline, sharpening interest in diversified primary sources. Because lead times from discovery to mine are long and prospective ground is easily overlooked beneath cover, transparent and defensible targeting carries real strategic weight for both explorers and the governments that permit and rely on secure supply.
Where it's used
The dominant use of tungsten is cemented tungsten carbide, an extraordinarily hard composite that accounts for most consumption and equips the cutting, drilling and wear-resistant tools of the metalworking, mining, construction and oil-and-gas industries. Tungsten is also a key alloying element in high-speed and tool steels and in superalloys, where it preserves strength and cutting edge at high temperature. Its very high density suits kinetic-energy penetrators, armour and radiation shielding, as well as balancing and vibration-damping weights. The metal's unmatched melting point long made it the material of choice for lamp filaments and electrodes, and it still serves electrical contacts, heating elements, catalysts and speciality pigments.
How MineDSS reads it
Tungsten is an intrusion-related, granophile system: it is carried by the fractionated, volatile-rich fluids of evolved granites, so the diagnostic evidence traces that incompatible-element chemistry. MineDSS names a tungsten-focused pathfinder suite qualitatively rather than through fixed weights. The seeded elements are tin, bismuth, molybdenum, arsenic, beryllium, lithium and copper, with tin, bismuth and molybdenum carrying the lead signal for skarn, vein and greisen systems. These trace the greisen, sulphide and fractionated-granite associations that accompany scheelite and wolframite. The geochemistry is interpreted alongside mapped intrusive and carbonate host geology and structure, geophysical expressions of concealed plutons and skarn, and satellite indications of altered ground. No single line is treated as decisive; the model weighs them jointly, so a coherent, mutually reinforcing pattern is ranked above any isolated anomaly.
Tungsten prospectivity — common questions
Which tungsten deposit types does MineDSS model?
MineDSS models three seeded deposit systems: skarn, vein and greisen tungsten. Skarn deposits host scheelite in calc-silicate rock where granitic fluids replace carbonate country rock, vein systems carry wolframite in quartz veins radiating from granite cupolas, and greisen systems concentrate wolframite and scheelite in the muscovite-quartz-topaz altered tops of late-stage granites. All three descend from the same fractionated, volatile-rich felsic magmas, which is the intrusion-related footprint the model is built to read. The model does not attempt to represent unrelated deposit styles; it ranks ground by its resemblance to these well-characterised settings.
How is the model's accuracy measured, and where is tungsten available?
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 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.
Which pathfinder elements does MineDSS use for tungsten?
The seeded pathfinder suite is tin, bismuth, molybdenum, arsenic, beryllium, lithium and copper, with tin, bismuth and molybdenum carrying the lead signal for skarn, vein and greisen systems. These elements reflect the granophile, greisen and sulphide associations typical of scheelite and wolframite mineralisation, tracing the fractionated granitic fluids from which tungsten precipitates. MineDSS interprets this geochemistry qualitatively and alongside other evidence — mapped intrusive and carbonate geology and structure, geophysical signatures of concealed plutons and skarn, and satellite indications of altered ground — rather than applying fixed numeric weights to any one element.
Does a high MineDSS score mean a deposit or a resource estimate?
No. A high score means ground is geologically similar to known mineralised systems and merits closer exploration attention. It is not a discovery, not a JORC or NI 43-101 resource or reserve estimate, and not drilling or investment advice. MineDSS ranks prospectivity to help prioritise where to look; confirming whether tungsten is present, and in what quantity and grade, still requires field programmes, drilling and independent assessment by qualified professionals.
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