Mine detail: Du Pont Tunnel

Previously called ''

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Location

Lat / long:

38.25944, -107.06701

Resource(B)

Primary:	Niobium (Columbium)
Secondary:	REE
Tertiary:	Titanium, Metal, Iron, Manganese, Thorium, Zinc, Phosphorus-Phosphates
Ore:	Pyrochlore
Gangue:	Anatase, Apatite, Barite, Bastnaesite, Biotite, Calcite, Fluorite, Ilmenite, Magnetite, Monazite, Phlogopite, Pyrite, Rutile, Sphene, Synchisite, Zircon
Discovery year:	1956

Production

Operation type:	Unknown
Production size:	None
Development status:	Prospect

Geology

Host type:	Intrusive Carbonatite
Associated rock:	Carbonatite
Associated type:	Intrusive Carbonatite
Structure:	Gunnison Uplift, San Juan Volcanic Field, Iron Hill Alkalic Complex, Cimarron Fault, Powderhorn Stock
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Oxidation Of Pyrite To Hematite And Goethite; Oxidation Of Rhodochrosite(?) To Mn Oxides

References

MRDS	D011389
DEP	10014564
Reference	{Deposit:: HEDLUND, D.C., AND OLSON, J.C., 1975, GEOLOGIC MAP OF THE POWDERHORN QUADRANGLE, GUNNISON AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1178.}{Deposit:: THOMPSON, J.V., 1983, ECONOMIC POTENTIAL OF THE CARBONATITE AND ALKALIC STOCK AT POWDERHORN, GUNNISON COUNTY, COLORADO, IN HANDFIELD, R.C., ED., GUNNISON GOLD BELT AND POWDERHORN CARBONATITE FIELD TRIP GUIDEBOOK: DREGS, P. 32-42.}{Deposit:: OLSON, J.C., AND HEDLUND, D.C., 1981, ALKALIC ROCKS AND RESOURCES OF THORIUM AND ASSOCIATED ELEMENTS IN THE POWDERHORN DISTRICT, GUNNISON COUNTY, COLORADO: USGS PROF. PAPER 1049-C.}{Deposit:: COLORADO DIV. MINES INF. REPTS.}
Reporter	Schwochow, Stephen D.