Mine detail: Alexite Vermiculite Mine

Previously called 'Powderhorn No. 1 MineUnpatented Claims: Inspiration Nos. 1-2NovelModelBudBobDead Mule Nos. 1-2ChristmasDecember'

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Location

Lat / long:

38.23889, -107.05673

Resource(N)

Primary:	Vermiculite
Gangue:	Augite, Biotite, Magnetite

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
First production started:	1943
Last production ended:	1944

Geology

Host type:	Pyroxenite
Associated rock:	Pyroxenite;Uncompahgrite;Carbonatite;Nepheline Syenite
Associated type:	Pyroxenite
Structure:	Gunnison Uplift, San Juan Volcanic Field, Iron Hill Alkalic Complex, Cimarron Fault, Powderhorn Stock
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Alteration Of Biotite And/Or Phlogopite To Vermiculite

References

MRDS	D011387
DEP	10014562
Reference	{Deposit:: OLSON, J.C., 1974, GEOLOGIC MAP OF THE RUDOLPH HILL QUADRANGLE, GUNNISON, HINSDALE, AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1177.}{Deposit:: BUSH, A.L., 1951, SOURCES OF LIGHTWEIGHT AGGREGATES IN COLORADO: COLORADO SCI. SOC. PROC., V. 15, NO. 8, P. 339-340.}{Deposit:: LA PLANTE, F.R., 1943, GUNNISON COUNTY ACTIVITIES: COLORADO MINING ASSOC. 1943 MINING YEARBOOK, P. 35-36.}{Deposit:: ALEXANDER, J.D., 1944, ALEXIT * YEAR OF GROWTH: COLORADO MINING ASSOC. 1944 MINING YEARBOOK, P. 85.}{Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.}{Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPTS.}
Reporter	Schwochow, Stephen D.