Description
Iowa State Mining Company (Claimant)
Commodities
PrimarySilver, Lead, Copper, Zinc
SecondaryGold
Commodity typeM
Deposit
Deposit typeVein
Deposit sizeS
Ore controlNw-Trending Fault/Fracture Possibly Related To Lake City Caldera Formation And Monzonite Intrusion
Materials
Ore mineralsChalcopyrite, Pyrite, Sphalerite
GangueChlorite, Quartz
Geology
Host rockQuartz Latite
Associated rockMonzonite,Rhyolite,Quartz Latite · Eureka Member Of Sapinero Mesa Tuff;Biotite-Quartz Latite Of Burns Member Of Silverton Volcanics;Intrusive Rocks--Monzonite Porphyry Zr Fiss. Track 23.3;Intrusive Rocks--Rhyolite
StructureSan Juan Volcanic Field, San Juan Depression, San Juan-Uncompahgre Calderas, Lake City Caldera, Eureka Graben
Tectonic settingCentral Cordillera (Southern Rocky Mtns)
AlterationChloritization
Economic & production
Development statusPast Producer
Last production1954
Discovery year1882
Identification
Deposit ID10087976
MRDS IDD011603
Alternate namesPatented Claims: Capitol City, MS 1148, Capitol City No. 2, MS 1149, Lilly, MS 1559, Sunny Chief, East End, Laddie Boy, Monkey Shine, Unpatented Claims: Crusader, Old Glory, High Stepper, Panhandle, Freeholder
RegionNA
Data scoreB
Coordinates38.0175, -107.47035
References
IRVING, J.D., AND BANCROFT, HOWLAND, 1911, GEOLOGY AND ORE DEPOSITS NEAR LAKE CITY, COLORADO: USGS BULL. 478, P. 77-78.SLACK, J.F., 1980, MULTISTAGE VEIN ORES OF THE LAKE CITY DISTRICT, WESTERN SAN MOUNTAINS, COLORADO: ECON. GEOLOGY, V. 75, NO. 7, P. 963-991.LIPMAN, P.W., 1976, GEOLOGIC MAP OF THE LAKE CITY CALDERA AREA, WESTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-962.COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.BLM MINERAL SURVEYS MS 1148, 1149, 1559COLORADO DIV. MINES ANNUAL OPERATOR REPTS.