List of Earth MRI focus areas with mineral system = Alkalic porphyry

Alkalic porphyry

Alkalic porphyry systems form in oceanic and continental magmatic arcs and in continental rifts by similar processes from fluids exsolved from more fractionated alkalic plutons and stocks. Resulting ore deposits tend to be more enriched in Au, Te, Bi, and V.

Color on map:

Deposit types

Name	Commodities	Critical minerals
Greisen	Mo, Bi	Bi
S-R-V tungsten	W	W, Bi, Mn, Sc
Porphyry/skarn copper-gold	Cu, Mo, Au	PGE, Te, Bi
Polymetallic sulfide S-R-V-IS	Au, Ag, Pb, Zn, Cu	Ge, Ga, In, Bi, Te
Fluorspar	Fluorite	Fluorite
Distal disseminated silver-gold	Ag, Au	Sb, As
High sulfidation	Cu, Ag, Au	Te, Bi, As, Sb
Low sulfidation	Au	Te, Bi, V, F
Lithocap alunite	Al, K2SO4 (potash)	Al, K2SO4, Ga
Lithocap kaolinite	Kaolin	Ga

References

Jensen, E.P., and Barton, M.D., 2000, Gold deposits related to alkaline magmatism, chap. 8 of Hagemann, S.G., and Brown, P.E., eds., Reviews in economic geology, volume 13--Gold in 2000: Littleton, Colo., Society of Economic Geologists, Inc., p. 279-314.
Kelley, K.D., and Spry, P.G., 2016, Critical elements in alkaline igneous rock-related epithermal gold deposits, chap. 9 of Verplanck, P.L, and Hitzman, M.W., eds., Reviews in economic geology, volume 18--Rare earth and critical elements in ore deposits: Littleton, Colo., Society of Economic Geologists, Inc., p. 195-216.
Wang, Z., Li, M.Y.H., Liu, Z.R.R., and Zhou, M.F., 2021, Scandium--Ore deposits, the pivotal role of magmatic enrichment and future exploration: Ore Geology Reviews, v. 128, article no. 103906, accessed April 12, 2021, at https://doi.org/10.1016/j.oregeorev.2020.103906.

Source: Hofstra, A.H., and Kreiner, D.C., 2020, Systems-Deposits-Commodities-Critical Minerals Table for the Earth Mapping Resources Initiative: U.S. Geological Survey Open-File Report 2020-1042, 24 p., https://doi.org/10.3133/ofr20201042.

List of Earth MRI focus areas with mineral system = Alkalic porphyry

27 focus areas match these criteria.

Focus area	Region	States	Mineral Systems	Deposit types	Commodities
Seward Peninsula-St. Lawrence Island PorphMo-W	Alaska	Alaska	Alkalic porphyry	Porphyry/skarn copper-gold	copper; gold; molybdenum
Cuttingsville stock	Northeast	Vermont	Alkalic porphyry	Porphyry/skarn copper-gold	copper; gold; molybdenum; silver
Bearpaw Mountains-Eagle Buttes	Northwest	Montana	Alkalic porphyry	Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver
Castle stock	Northwest	Montana	Alkalic porphyry	Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver
Challis fluorspar	Northwest	Idaho	Alkalic porphyry	Fluorspar; Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver
Judith Mountains	Northwest	Montana	Alkalic porphyry	Low sulfidation; Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver
Little Belt Mountains	Northwest	Montana	Alkalic porphyry	Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver
Lowland Creek Volcanics	Northwest	Montana	Alkalic porphyry	Low sulfidation	copper; gold; silver
Moccasin Mountains	Northwest	Montana	Alkalic porphyry	Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver
MT-ID Alkalic Belt	Northwest	Montana	Alkalic porphyry	Fluorspar; Polymetallic sulfide S-R-V-IS	copper; feldspar; lead; gold; silver; vermiculite
Yankee Fork fluorspar	Northwest	Idaho	Alkalic porphyry	Fluorspar	(none)
Zortman syenite	Northwest	Montana	Alkalic porphyry	Low sulfidation	copper; gold; silver
Bear Lodge District and Broader Region	Rocky Mountains	South Dakota; Wyoming	Alkalic porphyry	Low sulfidation; Polymetallic sulfide S-R-V-IS; Porphyry/skarn copper-gold	copper; gold; lead; molybdenum; silver
Central City-Idaho Springs polymetallic veins	Rocky Mountains	Colorado	Alkalic porphyry	Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver; uranium
Central Colorado epithermal Au-Ag	Rocky Mountains	Colorado	Alkalic porphyry	High sulfidation; Low sulfidation	copper; gold; lead; silver
Cripple Creek district	Rocky Mountains	Colorado	Alkalic porphyry	High sulfidation; Low sulfidation	copper; gold; silver
Jamestown district	Rocky Mountains	Colorado	Alkalic porphyry	Low sulfidation; Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver; uranium
La Plata polymetallic district	Rocky Mountains	Colorado	Alkalic porphyry	Distal disseminated silver-gold; Polymetallic sulfide S-R-V-IS; Porphyry/skarn copper-gold	copper; gold; lead; silver
Leucite Hills volcanics	Rocky Mountains	Wyoming	Alkalic porphyry	Lithocap alunite	diamond; diopside; garnet; peridot; spinel
Rattlesnake Hills Alkali Intrusive Complex	Rocky Mountains	Wyoming	Alkalic porphyry	High sulfidation; Low sulfidation	copper; gold; silver
St Peters dome district (Oligocene)	Rocky Mountains	Colorado	Alkalic porphyry	Low sulfidation; Polymetallic sulfide S-R-V-IS	copper; gold; lead; silver; uranium
Daisy Mine	Southwest	Nevada	Alkalic porphyry	Distal disseminated silver-gold; Fluorspar	copper; gold; mercury; molybdenum; silver; thallium
Gold Hill Mining District	Southwest	Utah	Alkalic porphyry	Distal disseminated silver-gold; Low sulfidation	gold; silver
Nogal-Bonito (Cedar Creek)	Southwest	New Mexico	Alkalic porphyry	Polymetallic sulfide S-R-V-IS; Porphyry/skarn copper-gold	copper; gold; lead; molybdenum; silver
Orogrande Mining District	Southwest	New Mexico	Alkalic porphyry	Porphyry/skarn copper-gold; S-R-V tungsten	copper; gold; iron; lead; molybdenum; silver; uranium
Texas-New Mexico alkaline belt	Southwest	New Mexico; Texas	Alkalic porphyry	Porphyry/skarn copper-gold; S-R-V tungsten	copper; gold; iron; lead; silver
White Oaks Mining District	Southwest	New Mexico	Alkalic porphyry	Porphyry/skarn copper-gold; S-R-V tungsten	copper; gold; molybdenum