granite-related / polymetallic
Bismuth prospectivityacross Australia, the USA, Canada & worldwide.
Granite-related and polymetallic bismuth, ranked and explained across Australia, the United States and Canada.
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✓ Australia
Ranked targets
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✓ United States
Ranked targets
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✓ Canada
Ranked targets
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Everywhere else
Global model
Ranked targets come with national models in Australia, the United States and Canada. Everywhere else, the global model returns the prospectivity map, the geology behind it and a confidence read. Next, the models are retrained on the full record and new sources, such as hyperspectral imagery, before we use them to rank and select ground.
How we rank bismuth ground
From a country to a decision.
- 01 · Atlas
Know the ground
The geology, structure, recorded deposits, tenure and geochemistry over the ground, on one map with the source of every layer.
See Atlas - 02 · Open Ground
Find ground you can peg
Which ground is open, held or excluded, read from each licensing authority's own register.
See Open Ground - 03 · Prospectivity
Rank it for bismuth
The ground scored for bismuth, with the evidence behind it and ranked targets in Australia, the United States and Canada. Anywhere else, the global model maps bismuth.
See Prospectivity - 04 · Spectral
Map the alteration
The alteration minerals and the structures that control them, from satellite: regional to district scale, and camp scale from WorldView-3.
See Spectral - 05 · Due Diligence
Check before committing
Tenure, land access, environment and the real cost to hold and test a bismuth position.
See Due Diligence -
Talk to us about bismuth
Partners, investors, publishers and researchers.
The deposit system
The bismuth system.
Bismuth is a brittle, silvery-white heavy metal prized for its very low melting point, its low toxicity and its unusual habit of expanding as it solidifies. In nature it occurs chiefly as native bismuth and as bismuthinite, a bismuth sulphide, and it is commonly carried in bismuth tellurides of the tetradymite group and in bismuth sulphosalts.
Read more: the deposit model, why it matters and where it is used +
More on bismuth
It is won almost entirely as a by-product of smelting lead, tungsten, tin and copper ores rather than from bismuth-only mines. MineDSS models bismuth through two deposit systems: granite-related and polymetallic. Both are tied to felsic intrusions, hydrothermal alteration and structurally focused sulphide mineralisation, and both leave a mappable footprint: greisenised and veined intrusive rocks, characteristic geophysical responses and a distinctive multi-element geochemical halo. That is exactly the pattern a prospectivity model is built to read across large, partly covered terrains.
The deposit model
Granite-related systems form in and around felsic intrusions, where fluids exsolving from cooling, fluorine- and boron-rich granites deposit native bismuth and bismuthinite in greisen, quartz veins and adjacent skarn. Bismuth here keeps close company with tungsten and tin ore minerals such as wolframite, scheelite and cassiterite, together with molybdenite, and is concentrated in the proximal, highest-temperature parts of these systems. Polymetallic systems carry bismuth in sulphide-rich veins (from base-metal lead-zinc-silver lodes distal to an intrusion to the classic five-element cobalt-nickel-silver-bismuth-arsenic assemblage) and in reduced intrusion-related gold settings, where bismuth-telluride melts scavenge and host gold.
Why it matters
Bismuth is classified as a critical mineral in several major economies because its supply is both concentrated and inelastic. It is recovered almost entirely as a by-product of lead, tungsten, tin and copper processing, so output cannot easily be raised in response to demand, and refining is concentrated in a small number of producers, with much Western refining capacity having closed decades ago. At the same time bismuth is increasingly valued as a low-toxicity, environmentally benign substitute for lead across solders, free-machining alloys and other applications. That combination of narrow supply and expanding, strategically sensitive demand is why transparent, defensible targeting of prospective ground carries real weight for explorers and for the governments that permit and depend on them.
Where it's used
Bismuth's most distinctive uses exploit its low melting point and low toxicity. Fusible and low-melting alloys built around bismuth are used in fire-sprinkler and safety plugs, fire-detection devices, precision casting and holding fixtures, while bismuth is a key ingredient of lead-free solders for electronics and plumbing. In metallurgy it acts as a machinability additive that replaces lead in free-cutting steels and aluminium. Bismuth compounds are widely used in medicine (bismuth subsalicylate and subcitrate treat digestive complaints and peptic ulcers) and as pearlescent and high-opacity pigments and cosmetics, including bismuth oxychloride and bismuth vanadate. Further applications include bismuth oxide in ceramics, glass and electronics, and bismuth-based industrial catalysts.
Questions
Bismuth: common questions.
Which bismuth deposit types does MineDSS model? +
MineDSS models two deposit systems: granite-related and polymetallic bismuth systems. Granite-related systems host native bismuth and bismuthinite in greisen, quartz veins and skarn around felsic, tungsten- and tin-bearing intrusions, concentrated in the proximal, high-temperature parts of those systems. Polymetallic systems carry bismuth in sulphide-rich veins: base-metal lead-zinc-silver lodes, the five-element cobalt-nickel-silver-bismuth-arsenic assemblage, and reduced intrusion-related gold settings where bismuth-telluride melts host gold. Because bismuth is recovered almost entirely as a by-product of lead, tungsten, tin and copper ores, both routes reflect real production geology. The model does not attempt to represent unrelated deposit styles; it ranks ground by how closely its evidence matches ground where samples assay anomalously high for the target mineral.
How is the model tested, and where can I run bismuth? +
Every MineDSS model is tested before it is served: we withhold whole blocks of ground, rebuild the model without them, and check that it still ranks the anomalous samples there above background, with test ground kept spatially separate. A model that does not pass our release gates is not used, for any mineral, in any country. National models for bismuth run in Australia, the United States and Canada, with ranked targets. Anywhere else in the world, the global model returns the prospectivity map, the geology behind it and a confidence read. Skill is model-level, never a specific site's measured accuracy, and never a discovery or JORC / NI 43-101 resource claim.
Which pathfinder elements track bismuth? +
The classic pathfinders are tungsten, tin, molybdenum, tellurium, gold and arsenic, with tungsten, tin and molybdenum leading for granite-related and polymetallic systems. Tungsten, tin and molybdenum reflect the greisen and skarn association around fertile granites; tellurium accompanies bismuth in its telluride minerals; gold marks the intrusion-related gold settings that bismuth-telluride melts help concentrate; and arsenic tracks the sulphide and five-element vein chemistry. These elements are part of the geochemical record our models learn from. In a run on any piece of ground, the map itself is read from geology and rock age, gravity and magnetics, radiometrics, terrain, satellite radar and spectral alteration, so it covers ground that has never been sampled.
Does a high MineDSS score mean a deposit or a resource estimate? +
No. A high score means its evidence closely matches ground where samples assay anomalously high for the target mineral, and it 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 bismuth is present, and in what quantity and grade, still requires field programmes, drilling and independent assessment by qualified professionals. Because bismuth is typically won as a by-product, that assessment also weighs the host tungsten, tin, gold or base-metal system that would actually be mined.
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Partners
Exploration and mining companies interested in working with us.
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Investors
The record, the models and the ground they point to.
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Publishers and researchers
Geological surveys, universities and programmes whose work the record is built on.
MineDSS ranks prospectivity to help you decide where to explore next. It is not a discovery, not a JORC or NI 43-101 resource or reserve estimate, and not drilling or investment advice.