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Eurydice Mine

Past Producer in Conejos county in Colorado, United States with commodities Gold, Silver, Copper, Lead
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10087896
MRDS ID D010639
Record type Site
Current site name Eurydice Mine
Alternate or previous names Patented Claims: Eurydice, MS 7760, Orpheus, MS 7760, Louisa, MS 7760, No. 10, MS 7000
Related records 10158762

Geographic coordinates

Geographic coordinates: -106.56366, 37.38335 (WGS84)
Elevation 3005
Relative position 3.6 MILES S 27 E FROM SUMMITVILLE

Site location context

Political divisions (FIPS codes)

Conejos(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Summitville(quadrangle 1:24,000 scale)

Antonito(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alamosa-Trinchera(hydrologic unit)

Rio Grande Headwaters(hydrologic accounting unit)

Rio Grande Headwaters(hydrologic subregion)

Rio Grande(hydrologic region)

Federal lands

Rio Grande National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Conejos

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 036N 004E 04,05,09 Colorado

Comments on the location information

  • SE OF ALAMOSA RIVER JUST ACROSS FROM ALUM CREEK CONFLUENCE AND AT MOUTH OF EURYDICE CREEK, 1.65 MILES SE OF LOOKOUT MTN. ; INFO FROM LAND.ST :1975

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Tertiary
Lead Tertiary

Materials information

Materials Type of material
Galena Ore
Petzite Ore
Pyrite Ore
Tetrahedrite Ore
Quartz Gangue

Analytical data

Result SIX MILL RUN ASSAYS FROM JULY-SEPT 1891 SHOWED 0.63 OZ/TON AU AND 29.83 OZ/TON AG, 0.23 OZ/TON AU AND 18.76 OZ/TON AG, 0.25 OZ/TON AU AND 22.67 OZ/TON AG, 0.15 OZ/TON AU AND 14.70 OZ/TON AG, 0.151 OZ/TON AU AND 17.75 OZ/TON AG, 0.24 OZ/TON AU AND 32.65 OZ/TON AG. NINE ASSAYS BY H.E. WOOD FROM MARCH 1891 TO FEB 1892 SHOWED 2.10 OZ/TON AU AND 21 OZ/TON AU AND 1760 OZ/TON AG, 0.10 OZ/TON AU AND 2049 OZ/TON AG, 0.04 OZ/TON AU AND 573.50 OZ/TON AG, 21.50 OZ/TON AU AND 529.50 OZ/TON AG, 0.05 OZ/TON AU AND 500 OZ/TON AG, 26.75 OZ/TON AU AND 25.30 OZ/TON AG, 27.04 OZ/TON AU AND 1138.60 OZ/TON AG, 2.80 OZ/TON AU AND 398.20 OZ/TON AG (ALL SPECIMEN MATERIAL). IN MINE, ALTERED ROCK CONTAINED 0.06 TO 0.5 OZ/TON AU AND 0.26 TO 10 OZ/TON AG. REFERENCE SPECIMENS CONTAINED 0.2 TO 1.33 OZ/TON AU AND 6.25 OZ/TON AG. SELECTED ORE SAMPLES CONTAINED 1 TO 7.3 OZ/TON AU AND 0.32 TO 553.30 OZ/TON AG.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Rock unit name Intrusive Rocks--Monzonite (Alamosa River Stock);Intrusive Rocks--Monzonite Porphyry (Alum Creek Porphyry)
    Rock description Intrusive Rocks--Monzonite (Alamosa River Stock);Intrusive Rocks--Monzonite Porphyry (Alum Creek Porphyry)
    Stratigraphic age (youngest) Oligocene
    Chronological age 29.1
    Dating method K-Ar
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Monzonite
    Rock unit name Intrusive Rocks--Monzonite (Alamosa River Stock);Intrusive Rocks--Monzonite Porphyry (Alum Creek Porphyry)
    Rock description Intrusive Rocks--Monzonite (Alamosa River Stock);Intrusive Rocks--Monzonite Porphyry (Alum Creek Porphyry)
    Stratigraphic age (youngest) Oligocene
    Chronological age 29.1
    Dating method K-Ar

Nearby scientific data

(1) -106.56366, 37.38335
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Volcanic Field
Type of structure Local
Structure description Platoro Caldera, Summitville Caldera, Alamosa River Stock, Summitville Fault, Platoro Fault Zone

Ore body information

  • Thickness 1.22M

Controls for ore emplacement

  • Mineralization Localized By Hydrothermal Activity Associated With Emplacement Of Alum Creek Porphyry

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of last production 1938

Mining district

District name Decatur West (Stunner) District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Stunner Mines, Inc.
    Home office Monte Vista
    First year 1938
  • Type Owner
    Owner George L. And Katherine T. Patterson
    Home office New York City, Ny.
    First year 1938

Comments on the production information

  • PARTIAL PRODUCTION RECORD. 1938 IS LAST YEAR OF REPORTED PRODUCTION (DUMP ORE). NO RECORDS AVAILABLE FOR YEARS PRIOR TO 1938.

Workings at the site

  • Type of workings Underground
    Length 390.14M
    Overall depth 121.92M
    Overall length 249.94M

Comments on the workings information

  • EURYDICE SHAFT SUNK 300 FT ON VEIN WITH SMALL NW-SW DRIFTS AT 20, 65, 110, 120, 230, AND 265 LEVELS. PRINCIPAL, DRIFT AT 190 LEVEL IS 680 FT TO SE WITH CROSSCUT OF UNKNOWN LENGTH AT 600 FT FROM SHAFT AND WITH STOPES AT SHAFT AND AT 500 FT FROM SHAFT. STOPE AT SHAFT ON 230 LEVEL. 350 FT SE OF SHAFT IS 150-FT LOUISA TUNNEL ALSO ON VEIN. 160 FT FARTHER SE IS 50-FT LOUISA SHAFT. 35-TPD FLOTATION MILL AT SHAFT.

Comments on development

  • MINE INACTIVE SINCE 1893, BUT SOME DUMP ORE MILLED IN 1938 (LAST REPORTED PRODUCTION)

Reference information

Bibliographic references

  • Deposit

    PATTON, H.B., 1917, GEOLOGY AND ORE DEPOSITS OF THE PLATORO-SUMMITVILLE MINING DISTRICT, COLORADO: CGS BULL. 13.

  • Deposit

    LIPMAN, P.W., 1974, GEOLOGIC MAP OF THE PLATORO CALDERA AREA, SOUTHEASTERN SAN JUAN MOUNTAINS, SOUTHWESTERN COLORADO: USGS MAP I-828.

  • Deposit

    CALKIN, W.S., 1967, GEOLOGY, ALTERATION, AND MINERALIZATION OF THE ALUM CREEK AREA. SAN JUAN VOLCANIC FIELD. COLORADO: COLORADO SCHOOL OF MINES THESIS T-1113.

  • Deposit

    COLORADO DIV. MINES INF. REPT.

  • Deposit

    BLM MINERAL SURVEY MS 7760, 7000

General comments

Subject category Comment text
Deposit POST-SUMMITVILLE-COLLAPSE IGNEOUS ACTIVITY INCLUDES EMPLACEMENT OF ALAMOSA RIVER MONZONITE STOCK ALONG SOUTH BOUNDING CORNWALL RING FAULT AND LOCAL VOLCANIC VENTS--SHEEPSHEAD, LOOKOUT MTN, ELEPHANT MTN. POST-INTRUSION EXTENSIONAL FAULTING MANIFESTED IN PLATORO FAULT ZONE TO SE AND SUMMITVILLE FAULT TO NW. EURYDICE VEIN LIES IN N 35 W-TRENDING FAULT THAT COULD BE EITHER SE EXTENSION OF SUMMITVILLE FAULT (AS INTERPRETED BY CALKIN, 1967) OR INTERMEDIATE ZONE BETWEEN SUMMITVILLE FAULT AND PLATORO FAULT ZONE. FAULT PLANES PROBABLY DISPLAY CALKIN'S SELECTIVE ALTERATION SUPERPOSED ACROSS HYDROTHERMAL ALTERATION OF ALAMOSA RIVER STOCK AND ALUM CREEK PORPHYRY.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1983 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.