Colorado · Hinsdale County
Occurrence

Red Mountain Alunite Deposit

Hinsdale County, Colorado, United States
SulfurSulfuric AcidPotassiumAluminum
⌖ Show on mapUSGS source ↗
Description

E.S. Larsen

Commodities
PrimarySulfur, Sulfuric Acid, Potassium, Aluminum
Commodity typeB
Deposit
Deposit typeReplacement
Model154: Epithermal quartz-alunite Au
Deposit sizeN
Orebody formCONICAL, HUGE IRREG. LENS
Ore controlZoned Alteration Around Central Volcanic Vent Intruded Along Caldera Ring Fault
Materials
Ore mineralsAlunite
GangueHematite, Kaolinite, Pyrite, Quartz
Geology
Host rockQuartz Latite
Associated rockRhyolite,Quartz Latite · Quartz Latite Of Red Mountain;Quartz Latite Of Grassy Mountain;Sunshine Peak Tuff;Biotite-Quartz Latite Of Burns Member Of Silverton Volcanics
StructureSan Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera, Red Mountain Lava Dome
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationSee Comments
Economic & production
Development statusOccurrence
Discovery year1911
Identification
Deposit ID10096873
MRDS IDD011566
Alternate namesRed Mountain Deposit
RegionNA
Data scoreB
Coordinates37.97779, -107.33396
References
LARSEN, E.S., 1913, ALUNITE IN THE SAN CRISTOBAL QUADRANGLE, COLORADO, in Lindgren, Waldemar, Contributions to economic geology, 1911, Part I, Metals and non-metals except fuels--Aluminum ores: USGS BULL. 530, p. 179-183.HALL, R.B., 1978, WORLD NONBAUXITIC ALUMINUM RESOURCES--ALUNITE: USGS PROF. PAPER 1076-A, 35 P.HALL, R.B., 1980, ALUNITE--A POTENTIALLY ECONOMIC SOURCE OF ALUMINUM AND POTASH?, IN SCHWOCHOW, S.D., ED., PROCEEDINGS OF THE FIFTEENTH FORUM ON GEOLOGY OF INDUSTRIAL MINERALS: CGS RESOURCE SER. 8, P. 77-88.LYLE, DON, 1977, ALUNITE LODE DISCOVERED IN HIGH COUNTRY: ROCKY MOUNTAIN NEWS, V. 119, NO. 106 (AUG. 6), P. 94.MEHNERT, H.H., AND OTHERS, 1979, K-AR AGE OF ALTERATION AT RED MOUNTAIN, LAKE CITY AREA, WESTERN SAN JUAN MOUNTAINS, COLORADO: USGS OPEN-FILE REPT. OFR-79-1642, 10 P.MCGREGOR, HEATHER, 1983, WEST SLOPE STRIP-MINING PLAN FOR ALUNITE STIRS CONTROVERSY: DENVER POST, JULY 6.HADDOW, ELLEN, 1983, MINERAL DEPOSIT SPURS CLASH ON WILDERNESS SITE: DENVER POST, APRIL 11.MINING RECORD, 1983, BLM TO CONDUCT MEETING ON ALUNITE MINING OPERATION: MINING RECORD, AUG. 10.LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.ENGINEERING AND MINING JOURNAL, INTERN. DIR. 1983, V. 9, NO. 10, P. 3 (Copied from deleted record 10111312 = DE03000)1973 RECON EARTH SCIENCES, INC.: SAMPLINGSTEVEN, T. A., LIPMAN, P. W., HAIL, W. J., JR., BARKER, FRED, AND LUEDKE, R. G., COMPILERS, 1974 , GEOLOGIC MAP OF THE DURANGO QUADRANGLE, SOUTHWESTERN COLORADO, USGS MISC. INV. MAP I-764 , SCALE 1:250,000.