The Iowa Mine is a silver and gold mine located in Rio Grande county, Colorado at an elevation of 11,873 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 11,873 Feet (3,619 Meters)
Commodity: Silver, Gold
Lat, Long: 37.42028, -106.59500
Map: View on Google Maps
Satelite View
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Iowa Mine MRDS details
Site Name
Primary: Iowa Mine
Secondary: Patented Claim: Iowa
Secondary: Ms 895
Commodity
Primary: Silver
Primary: Gold
Secondary: Copper
Location
State: Colorado
County: Rio Grande
District: Summit (Summitville) District
Land Status
Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1882
Discovery Year: 1882
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Type: R
Description: San Juan Volcanic Field
Type: L
Description: Platoro Caldera, Summitville Caldera, Summitville Fault, South Mountain Dome
Alterations
Alteration Type: L
Alteration Text: Quartz-Alunite Solfataric Alteration
Rocks
Name: Quartz Latite
Role: Associated
Age Type: Host Rock
Age Young: Miocene
Name: Quartz Latite
Role: Associated
Age Type: Associated Rock
Age Young: Miocene
Analytical Data
Analytical Data: STALAGMITES, 0.35 OZ/TON AU, 2 OZ/TON AG. ASSAYS FROM CARPER (1914): 1.28 OZ/TON AU, 9.7 OZ/TON AG (AT $20.65/OZ AU, $0.60/OZ AG).
Analytical Data: ANALYSES OF AURIFEROUS LIMONITE FROM IOWA TUNNEL AT INTERSECTION WITH BLACK WONDER (OR GOLCONDA) VEIN (PATTON, 1917): STALACTITES, 0.12 OZ/TON AU, 0.5 OZ/TON AG
Materials
Not available
Comments
Comment (Deposit): SOUTH TEWKSBURY VEIN ZONE TRENDS N 30 W, NEARLY VERTICAL, AND CONSISTS OF DISCONTINUOUS HIGHLY SILICIFIED ROCK (VUGGY QUARTZ ROCK OF QUARTZ-ALUNITE ZONE). SOME ARGILLIC/PROPYLITIC ZONE ALTERATION ON SW SIDE OF VEIN. LARGE MASS OF COMPACT QUARTZ ROCK AT NORTH END OF SOUTH ZONE. NORTH TEWKSBURY VEIN ZONE TRENDS N 20 TO 35 W AND APPARENTLY DIPS 75 NE DOWN TO COPPER HILL LEVEL AND 85 NE BETWEEN COPPER HILL AND REYNOLDS LEVELS. SMALL MASS OF VUGGY QUARTZ ROCK AT NORTH END. AZTEC-BLACK WONDER VEIN ZONE TRENDS GENERALLY NORTH TO NW AND CONSISTS OF DISCONTINUOUS INTERSECTING VEINS, PIPES, AND IRREGULAR PODS IN HIGHLY SILICIFIED QUARTZ LATITE SURROUNDED BY SOFT ARGILLIZED ENVELOPE OVER PIPE AT SE END. AZTEC PIPE APPARENTLY LOCALIZED AT INTERSECTION OF FRACTURES. DISCONTINUOUS IRREGULAR BLACK WONDER VEIN VERTICAL DOWN TO IOWA LEVEL WHERE IT MAY JOIN TEWKSBURY VEIN.
Comment (Location): ON ESE SLOPE OF SOUTH MTN. PORTAL ELEV FROM STEVEN AND RATTE (1960, PL. 4). ; INFO FROM LAND.ST :1975
Comment (Workings): IOWA CROSSCUT TUNNEL DRIVEN S 48 W FOR 530 FT TO TEWKSBURY VEIN ZONE, CONTINUING 300 FT AND BRANCHING INTO TWO TUNNELS TO AZTEC VEIN. IOWA LEVEL DRIFTS AND STOPES DEVELOPED ON SOUTH AND NORTH TEWKSBURY VEINS, AZTEC-BLACK WONDER, AND HIDDEN VEINS. TOTAL CROSSCUTS APPROX 1470 FT; DRIFTS APPROX 5400 FT; OPEN CUTS AND GLORY HOLES TO SURFACE (SUCH AS SOUTH TEWKSBURY STOPE) DEVELOPED ABOVE LEVEL.
References
Reference (Deposit): LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.
Reference (Deposit): CARPER, A.F., 1914, GEOLOGY AND ORE DEPOSITS OF SOUTH MOUNTAIN, RIO GRANDE COUNTY, COLORADO: COLORADO SCHOOL OF MINES THESIS T-464.
Reference (Deposit): BLM MINERAL SURVEY MS 895
Reference (Deposit): PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.
Reference (Deposit): STEVEN, T.A., AND RATTE, J.C., 1960, GEOLOGY AND ORE DEPOSITS OF THE SUMMITVILLE DISTRICT, SAN JUAN MOUNTAINS, COLORADO: USGS PROF. PAPER 343
Colorado Mining Photos
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