Hicks Dome (Record #35) rare-earth element deposit in Illinois, United States

Hicks Dome

Carbonatite rare earth element deposit in Illinois, United States

Geographic location

Country	United States
State or province	Illinois
Geographic location:	-88.4, 37.6
(click for info)

Location references

Jackson, W.D., and Christiansen, Grey, 1993, International strategic minerals inventory summary report-- Rare-earth oxides: U.S. Geological Survey Circular 930-N, 68 p.

Geologic characteristics

Deposit type	Carbonatite
Age of deposit	252 ± 13 Ma and 269 ± 13 Ma (K-Ar, bio, mica peridotite)
REE minerals	xenotime bastnäsite churchite
Ore minerals	fluorite thorite barite apatite sulfides hematite
Gangue minerals	calcite quartz
Host rock types	peridotite intrusive breccia

Nearby scientific information

Geologic map unit	-88.4, 37.6
Other databases	Find additional scientific data near this location

Economic information

Status	Potential resource
Resource estimates	14.7 Mt @ 0.42% REO (1978)

References for resource estimates

Jackson, W.D., and Christiansen, Grey, 1993, International strategic minerals inventory summary report-- Rare-earth oxides: U.S. Geological Survey Circular 930-N, 68 p.

Comments

Ore contains 0.42% REO and 0.15% ThO2.

Bibliographic references

Woolley, A.R., 1987, Alkaline rocks and carbonatites of the world; Part 1, North and South America: London, United Kingdom, British Museum of Natural History, 216 p.
Jackson, W.D., and Christiansen, Grey, 1993, International strategic minerals inventory summary report-- Rare-earth oxides: U.S. Geological Survey Circular 930-N, 68 p.