12 focus areas match these criteria.
Focus area | Region | States | Mineral Systems | Deposit types | Commodities |
---|---|---|---|---|---|
Minnesota Quetico Province | North Central | Minnesota; North Dakota | Porphyry Sn (granite-related) | Pegmatite LCT; Porphyry/skarn | (none) |
Neoarchean Greenstone Belts of Minnesota, North Dakota and South Dakota | North Central | Minnesota; North Dakota; South Dakota | Mafic magmatic | Nickel-copper-PGE sulfide | copper; gold; selenium; silver |
Neoarchean Greenstone Belts of Minnesota, North Dakota and South Dakota | North Central | Minnesota; North Dakota; South Dakota | Volcanogenic seafloor | Algoma iron; Copper-zinc sulfide; Polymetallic sulfide; Zinc-copper sulfide | copper; gold; iron; lead; silver |
Neoarchean Greenstone Belts of Minnesota, North Dakota and South Dakota | North Central | Minnesota; North Dakota; South Dakota | Orogenic | Gold | gold; silver |
Neoarchean Greenstone Belts of Minnesota, North Dakota and South Dakota | North Central | Minnesota; North Dakota; South Dakota | Magmatic REE | Peralkaline syenite/granite/rhyolite/alaskite/pegmatites | copper; thorium; uranium; yttrium |
Neoarchean Greenstone Belts of Minnesota, North Dakota and South Dakota | North Central | Minnesota; North Dakota; South Dakota | Porphyry Sn (granite-related) | Pegmatite LCT | (none) |
Turtle Mountains manganese | North Central | North Dakota | Chemical weathering | Supergene manganese | (none) |
Walsh County gabbro | North Central | North Dakota | Mafic magmatic | Nickel-copper-PGE sulfide | copper; gold; selenium; silver |
Williston Basin potash | North Central | Montana; North Dakota | Marine evaporite | Potash; Salt | carnallite; salt (NaCl) |
Williston Basin potash | North Central | Montana; North Dakota | Basin brine path | Basin brine | bromine; iodine; petroleum; salt |
Cretaceous heavy-mineral placer sandstones (black sandstones) | Northwest; North Central; Rocky Mountains | Montana; North Dakota; South Dakota; Wyoming | Placer | Columbite/tantalite; Gold; Ilmenite/rutile/leucoxene; Monazite/xenotime; Uraninite, autunite-group minerals; Wolframite/scheelite; Zircon | gold; iron; thorium; uranium; yttrium |
Cretaceous-Paleocene coals, underclays, and interbeds | Rocky Mountains | Montana; North Dakota; South Dakota; Wyoming | Chemical weathering | Clay; Coal uranium, Regolith (Ion adsorption) REE; Surficial uranium | aggregate (coal clinker); clay; coal; molybdenum; uranium; yttrium |