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Rare Earth Elements: A Review of Production, Processing ...

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<strong>Rare</strong> <strong>Earth</strong> <strong>Elements</strong> <strong>Review</strong> Appendix B – REE Mines and Mineral Deposits in the U.S.<br />

Appendix B<br />

Locations <strong>of</strong> REE-Producing Mines and REE-Containing Mineral Deposits in the U.S.<br />

State /<br />

Province Deposit Type<br />

Alaska<br />

Alkalic Igneous<br />

Map<br />

Reference<br />

No (Figure<br />

3-1) Deposit Name Status Company Comments<br />

226 Mount Prindle<br />

(Roy Creek)<br />

160 Bokan<br />

Mountain<br />

(Ross-Adams)<br />

Occurrence — Selected material contained ama 25% REE and 15%<br />

Th. LREE more abundant in the quartz-bearing<br />

syenites.<br />

Potential<br />

resource REE,<br />

Past Prod. U<br />

— REE-bearing pegmatites, dikes, and shear<br />

zones/fractures in central part <strong>of</strong> the complex and in<br />

veins in the outer parts & nearby country rocks.<br />

Produced 98,000 mt <strong>of</strong> approx. 1% U3O8. Because<br />

dikes generally < 1 m thick and mineralogically<br />

complex, econo<br />

Orris, et<br />

al. a<br />

Long, et<br />

al. b<br />

Gupta,<br />

et al. c<br />

Schüler,<br />

et al. d<br />

� — — —<br />

� � — �<br />

175 Dora Bay Prospect — — � — — —<br />

Carbonatite 77 Salmon Bay Occurrence — Veins. � � — —<br />

Other Igneous-<br />

Affiliated<br />

(including<br />

Pegmatites and<br />

Veins)<br />

312 Wolf Mountain Occurrence — — � — — —<br />

Other—<br />

753 Eagle Creek Occurrence — U, Th, and REE minerals along margins <strong>of</strong> alkaline � — — —<br />

Uncertain<br />

dikes.<br />

627 Circle Occurrence — — � — — —<br />

629 El Dorado Occurrence — Panned concentrate contained 0.029% Eu and 0.02% � — — —<br />

Creek area<br />

U.<br />

630 Fortymile Occurrence — � — — —<br />

Placer, Alluvial<br />

635<br />

636<br />

Hot Springs<br />

Iditarod<br />

Occurrence<br />

Occurrence<br />

—<br />

—<br />

Buried bench gravels.<br />

—<br />

�<br />

�<br />

—<br />

—<br />

—<br />

—<br />

—<br />

—<br />

655 McGrath Occurrence — — � — — —<br />

665 Port Clarence Occurrence — — � — — —<br />

670 Ruby Meadows Occurrence — Buried placer deposit. � — — —<br />

680 Tolovana Occurrence — — � — — —<br />

B-1

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