Scandium prospectivity
across the USA & Canada.
Magmatic mafic-ultramafic and lateritic scandium, ranked and explained — validated across the USA and Canada.
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What the model reads for scandium.
Every scandium 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: Vanadium, nickel and cobalt. These are the elements this national model actually reads to rank scandium ground.
What is scandium?
Scandium is a light transition metal, chemically allied to the rare earths, prized for the outsized strengthening effect it has on aluminium. It rarely forms minerals of its own — the scandium silicate thortveitite is the only notable ore mineral — and is instead dispersed at trace levels, substituting for iron and magnesium in ferromagnesian minerals and iron oxides. MineDSS models scandium through two seeded families: magmatic mafic-ultramafic systems and lateritic systems. In the first, scandium concentrates in clinopyroxene and amphibole within mafic to ultramafic intrusions; in the second, deep tropical weathering of those same rocks upgrades scandium in the iron-oxide-rich limonite zone. Both leave a mappable footprint — distinctive host lithologies, geophysical responses and a co-located multi-element geochemical signature — which is exactly the pattern a prospectivity model is built to read across large, partly covered terrains.
The deposit model
Both seeded systems trace back to mafic-ultramafic magmatism, which supplies the scandium budget. In magmatic systems, scandium substitutes for iron and magnesium in clinopyroxene, such as augite and diopside, and in amphibole as a mafic to ultramafic magma crystallises; hydrous, clinopyroxene-rich intrusions such as zoned Alaskan-type complexes are the most fertile, and magmatic processes are estimated to hold the large majority of global scandium resources. Lateritic systems form where those clinopyroxene-rich rocks undergo prolonged tropical weathering: as the primary silicates break down, scandium is retained and upgraded in the goethite- and hematite-bearing limonite horizon, the same iron-oxide zone that hosts nickel and cobalt, with grades climbing several-fold over the parent rock. MineDSS reads these settings by combining mapped mafic-ultramafic geology and weathering profiles, geophysical signatures of dense ultramafic bodies and their laterite cover, satellite-mapped weathered and altered ground, and the pathfinder geochemistry that tracks the ferromagnesian and iron-oxide associations, ranking ground by its resemblance to known scandium-enriched systems.
Why it matters
Scandium is a strategic critical mineral. It appears on the United States' critical-minerals list and on comparable lists in other major economies, reflecting both its enabling role in high-performance materials and an unusually fragile supply chain. Almost all scandium is recovered as a by-product of other operations — titanium, rare-earth, nickel, uranium and aluminium processing — so there is little primary production able to respond to demand, and output is concentrated in a handful of countries. That concentration, combined with recent export controls on scandium products, has sharpened government and industrial interest in secure, diversified sources. Because the metal is dispersed and by-product-dominated, transparent, defensible targeting of genuinely prospective ground carries real weight for explorers and the governments that permit them.
Where it's used
Scandium's flagship application is the aluminium-scandium alloy: additions of only a fraction of a per cent refine the grain structure and sharply raise strength, weldability and resistance to heat and corrosion, with little weight penalty. These alloys are sought for aerospace and defence structures and for metal additive manufacturing, where scandium-modified powders print high-strength, low-porosity components. The second major use is in solid oxide fuel cells, where scandia-stabilised zirconia serves as a high-conductivity electrolyte and now accounts for a growing share of demand. Scandium also goes into high-intensity discharge lighting, advanced ceramics, speciality lasers and electronic components. Small quantities deliver large performance gains, which is why secure supply matters despite modest tonnages.
How MineDSS reads it
Scandium tracks the ferromagnesian and iron-oxide chemistry of mafic-ultramafic rocks and their laterites, so its evidence follows the elements that travel with it. MineDSS reads a co-located pathfinder suite qualitatively: vanadium, nickel and cobalt carry the lead signal, joined by chromium, gallium and niobium, which trace the mafic-ultramafic source and the nickel-cobalt laterite association that upgrades scandium. This geochemistry is weighed alongside mapped intrusive and weathering geology, geophysics that resolves ultramafic bodies and their cover, and satellite indications of weathered ground. The national models draw on more than 1.25 million assayed samples, with anomalous scandium — at or above 25 parts per million, roughly the top eight per cent of assays — set as the target. No single line is decisive; converging evidence is ranked above any isolated anomaly.
Scandium prospectivity — common questions
Which scandium deposit types does MineDSS model?
Two seeded deposit families are modelled: magmatic mafic-ultramafic systems and lateritic systems. In magmatic systems, scandium substitutes into clinopyroxene and amphibole in mafic to ultramafic intrusions, with hydrous, clinopyroxene-rich bodies such as zoned Alaskan-type complexes the most fertile hosts. Lateritic systems form where those rocks weather deeply and scandium is upgraded in the goethite- and hematite-rich limonite zone, alongside nickel and cobalt. The model does not attempt unrelated styles such as carbonatite or pegmatite scandium; it ranks ground by its resemblance to these mafic-ultramafic and laterite settings.
How is the model's accuracy measured, and where is scandium 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 scandium?
The seeded pathfinder suite is vanadium, nickel, cobalt, chromium, gallium and niobium, with vanadium, nickel and cobalt carrying the lead signal. These trace the ferromagnesian minerals and iron oxides that carry scandium in mafic-ultramafic rocks and the nickel-cobalt laterites that concentrate it. MineDSS interprets this geochemistry qualitatively and alongside other evidence — mapped intrusive and weathering geology, geophysical signatures of ultramafic bodies, and satellite indications of weathered ground — rather than applying fixed numeric weights. The pathfinders are read as evidence for a scandium-fertile system, not as commodities the platform ranks in their own right.
Does a high MineDSS score mean a deposit or a resource estimate?
No. A high score means ground is geologically similar to known scandium-enriched 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. Because scandium is dispersed and typically won as a by-product, confirming whether an economic concentration is present — and at what grade and tonnage — still requires field programmes, drilling, metallurgical testwork and independent assessment by qualified professionals. MineDSS ranks prospectivity to help prioritise where to look.
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