The Eagle Pass Mine is a gold and silver mine located in La Plata county, Colorado at an elevation of 11,650 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: 11,650 Feet (3,551 Meters)
Commodity: Gold, Silver
Lat, Long: 37.41472, -108.01361
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Eagle Pass Mine MRDS details
Site Name
Primary: Eagle Pass Mine
Secondary: Patented Claim: Eagle Pass, MS 6124
Secondary: Unpatented Claims: Bodie
Secondary: Roosevelt
Commodity
Primary: Gold
Primary: Silver
Secondary: Lead
Secondary: Copper
Tertiary: Mercury
Tertiary: Zinc
Tertiary: Tellurium
Location
State: Colorado
County: La Plata
District: California (La Plata) District
Land Status
Land ownership: National Forest
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.
Administrative Organization: San Juan N. F.
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Eagle Pass Mining And Milling Co.
Home Office: Denver, Co.
Years: 1920 -
Production
Year: 1917
Material type: AG ACC
Description: Ap_Grade: ^0.5 Oz/Ton Au, 21 Oz/Ton Ag, 2% Zn
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1885
Year Last Production: 1922
Discovery Year: 1885
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Navajo Section
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Type: R
Description: San Juan Uplift, Four Corners Platform
Type: L
Description: La Plata Dome
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene
Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene
Name: Diorite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian
Analytical Data
Analytical Data: REPRESENTATIVE SAMPLE OF VEIN MATTER FROM UPPER DUMP CONTAINED 0.72 OZ/TON AU AND 3.82 OZ/TON AG. ORE MINED IN 1919 ASSAYED 0.5 OZ/TON AU, 21 OZ/TON AG, 2% ZN.
Materials
Ore: Gold
Ore: Galena
Ore: Pyrite
Ore: Sphalerite
Ore: Hessite
Ore: Coloradoite
Gangue: Quartz
Gangue: Barite
Comments
Comment (Deposit): Discovery Year: 1880S
Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). AT HEAD OF LEWIS CREEK JUST BELOW WEST SIDE OF EAGLE PASS, 2.95 MILES NE OF LA PLATA TOWNSITE (UNSURVEYED SECTION). ; INFO FROM LAND.ST :1974
Comment (Production): PARTIAL PRODUCTION RECORD. FIGURES UNAVAILABLE FOR EARLY YEARS OF PRODUCTION PRIOR TO 1887. ORE TONNAGES NOT REPORTED FOR 1887 AND 1888. ORE GRADE FOR 1919 FROM CDM ANNUAL OPERATOR REPT. NO PRODUCTION REPORTED FOR 1889-1910, 1912, 1915-1916, 1918, 1920-1921, AND AFTER 1922.
Comment (Development): DEPOSIT DISCOVERED RELATIVELY EARLY IN DISTRICT'S HISTORY; MINE WORKED INTERMITTENTLY FROM 1887 TO 1922.
Comment (Deposit): COUNTRY ROCK CONSISTS OF MODERATELY SILICIFIED CUTLER FM RED BEDS INTRUDED BY DIORITE-MONZONITE PORPHYRY SILLS. EAGLE PASS VEIN STRIKES ENE, DIPS 57 TO 62 NW, AND CONSISTS OF A 10-FT FRACTURE ZONE CONTAINING QUARTZ AND BARITE. DUMP ORE SHOWS GREENISH (TELLURIDE-BEARING) QUARTZ FORMED BY REPLACEMENT OF BRECCIATED WALLROCKS AND CONTAINING SCATTERED TELLURIDES, GALENA, AND FREE AU. ORE SHOOT MAY HAVE BEEN LOCATED NEAR INTERSECTION OF EAGLE PASS AND GOOD HOPE VEINS. EAGLE PASS VEIN PROBABLY INTERSECTS JENNIE LIND VEIN BUT AREA HAS NOT BEEN EXPLORED.
Comment (Workings): ALL WORKINGS WERE INACCESSIBLE, BUT MAIN ADIT DRIVEN GENERALLY EASTWARD FOR ABOUT 200 FT.
References
Reference (Deposit): ECKEL, E.B., AND OTHERS, 1949, GEOLOGY AND ORE DEPOSITS OF THE LA PLATA DISTRICT, COLORADO: USGS PROF. PAPER 219, P. 73-76, 117.
Reference (Deposit): COLORADO DIV. MINES INF. REPT.
Reference (Deposit): BLM MINERAL SURVEY MS 6124
Reference (Production): ECKEL AND OTHERS, 1949, P. 117 (AS COMPILED FROM U.S MINE, USGS, AND USBM RECORDS); COLORADO DIV. MINES ANNUAL OPERATOR REPT.
Colorado Mining Photos
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