Commodities
PrimaryVermiculite
Commodity typeN
Materials
GangueAugite, Biotite, Magnetite
Geology
Host rockPyroxenite
Associated rockPyroxenite · Pyroxenite;Uncompahgrite;Carbonatite;Nepheline Syenite
StructureGunnison Uplift, San Juan Volcanic Field, Iron Hill Alkalic Complex, Cimarron Fault, Powderhorn Stock
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationAlteration Of Biotite And/Or Phlogopite To Vermiculite
Economic & production
Development statusPast Producer
First production1943
Last production1944
Identification
Deposit ID10014562
MRDS IDD011387
Alternate namesPowderhorn No. 1 Mine, Unpatented Claims: Inspiration Nos. 1-2, Novel, Model, Bud, Bob, Dead Mule Nos. 1-2, Christmas, December
RegionNA
Data scoreB
Coordinates38.23889, -107.05673
References
OLSON, J.C., 1974, GEOLOGIC MAP OF THE RUDOLPH HILL QUADRANGLE, GUNNISON, HINSDALE, AND SAGUACHE COUNTIES, COLORADO: USGS MAP GQ-1177.BUSH, A.L., 1951, SOURCES OF LIGHTWEIGHT AGGREGATES IN COLORADO: COLORADO SCI. SOC. PROC., V. 15, NO. 8, P. 339-340.LA PLANTE, F.R., 1943, GUNNISON COUNTY ACTIVITIES: COLORADO MINING ASSOC. 1943 MINING YEARBOOK, P. 35-36.ALEXANDER, J.D., 1944, ALEXITE'S YEAR OF GROWTH: COLORADO MINING ASSOC. 1944 MINING YEARBOOK, P. 85.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.COLORADO DIV. MINES ANNUAL OPERATOR REPTS.