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Moro Mine

Past Producer in Hinsdale county in Colorado, United States with commodities Silver, Lead, Copper, Gold, Zinc, Antimony
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10087978
MRDS ID D011616
Record type Site
Current site name Moro Mine
Alternate or previous names Moro-Ajax Mine, Patented Claims: Moro Limited, MS 13811, Ajax Limited, MS 13811, Unpatented Claims: Ajax No.2, Moro Extension, Moro Mill Site, Moro Tunnel Site
Related records 10263803

Geographic coordinates

Geographic coordinates: -107.48535, 37.99889 (WGS84)
Elevation 3328
Relative position 10.0 MILES S 77 W FROM LAKE CITY

Site location context

Political divisions (FIPS codes)

Hinsdale(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Redcloud Peak(quadrangle 1:24,000 scale)

Silverton(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Gunnison(hydrologic unit)

Gunnison(hydrologic accounting unit)

Gunnison(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CO)

Bureau of Land Management CO BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Colorado Hinsdale

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 043N 006W 11 S2 Colorado

Comments on the location information

  • MINE LIES ON SOUTH SIDE OF UNNAMED TRIBUTARY OF HENSON CREEK ABOUT 1.5 MILES SW OF CAPITOL CITY SITE. ; INFO FROM LAND.ST :1977

Commodities

Commodity Importance
Silver Primary
Lead Primary
Copper Secondary
Gold Secondary
Zinc Critical Tertiary
Antimony Critical Tertiary

Materials information

Materials Type of material
Anglesite Ore
Chalcocite Ore
Chalcopyrite Ore
Covellite Ore
Sphalerite Ore
Barite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation Of Pyrite To Hematite; Oxidation Of Galena To Anglesite

Analytical data

Result ORE FROM THIRD LEVEL ASSAYED 10 TO 16 OZ/TON AU, 0.5 TO 3 OZ/TON AU, 2 TO 4 % CU, 7 TO 30 % PB, 7 TO 10 % ZN

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Monzonite
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Eureka Member Of Sapinero Mesa Tuff;Intrusive Rocks--Monzonite Porphyry
    Rock description Eureka Member Of Sapinero Mesa Tuff;Intrusive Rocks--Monzonite Porphyry
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -107.48535, 37.99889
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Volcanic Field, San Juan Depression
Type of structure Local
Structure description San Juan-Uncompahgre Calderas, Lake City Caldera

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Galena (Henson Creek) District

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner Independence Mining Co.
    Home office Lake City, Co.
    First year 1964

Comments on the workings information

  • MINE DEVELOPED BY THREE DRIFT TUNNELS AND ONE SHAFT. FIRST (UPPER) TUNNEL DRIVEN GENERALLY SW ALONG VEIN FOR 500 FT, CONNECTING WITH 150-FT SHAFT AT 200 FT FROM PORTAL. SECOND LEVEL, LOCATED 71 FT BELOW AND 110 FT NE OF UPPER PORTAL, DRIVEN GENERALLY SW ALONG VEIN FOR 570 FT; AT 310 FT FROM PORTAL, RAISE CONNECTS TO 180-FT POINT IN UPPER TUNNEL AND 500-FT POINT IN LOWER TUNNEL. THIRD (LOWER) TUNNEL, LOCATED 126 FT BELOW AND 230 FT NE OF MIDDLE PORTAL, DRIVEN S 60 W FOR 75 FT, THENCE SW FOR 300 FT TO FACE; AT 180 FT FROM PORTAL, 90-FT DRIFT DRIVEN S 7 E TO FACE; AT 210 FT FROM PORTAL, MAIN DRIFT DRIVEN S 7 E FOR 80 FT, THENCE GENERALLY SOUTH FOR 200 FT, THENCE GENERALLY SE FOR 280 FT TO FACE. MINE CONNECTED BY WIRE-ROPE TRAMWAY TO OLD 110-TPD MILL.

Comments on development

  • IN LATE 1890S OR EARLY 1900S, WIRE-ROPE TRAMWAY WAS INSTALLED TO CONNECT MINE WITH OLD HANNA MINING AND MILLING COMPANY'S 110-TPD- CAPACITY MILL ALONG HENSON CREEK AT MOUTH OF MINE'S GULCH. IN 1906 MILL WAS ENLARGED TO CONTAIN ROLLS. HUNTINGTON MILLS, CONCENTRATING TABNLES, SLIMERS, SETTLING TANKS, AND BLAKE-MORSCHER STATIC ELECTRIC MACHINE FOR HANDLING ZN CONCENTRATES. POWER WAS SUPPLIED BY CAPITOL CITY POWER & ELECTRIC CO, DEVELOPMENT WORK DONE IN 1951 BY MORO MINES, LTD., OF LAKE CITY

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit MINE LOCATED INSIDE NW RIM OF UNCOMPAHGRE CALDERA JUST OUTSIDE LAKE CITY CALDERA RING FAULT IN INFILL SEQUENCE OF EUREKA MEMBER RHYOLITE OVERLAIN BY BURNS MEMBBER QUARTZ LATITE AND PORPHYRITIC ANDESITE OF SILVERTON VOLCANICS. INTRUDING AND HYDRO-THERMALLY ALTERING EUREKA MEMBER ARE SEVERAL PLUGS OF MONZONITE PORPHYRY JUST NE OF MINE. VEIN LIES IN CONCENTRIC FAULT OR FRACTURE IN SLACK'S (1980) QUARTZ/BASE-METAL ASSEMBLAGE, INNER QUARTZ-CHALCOPYRITE ZONE. VEIN HAS SMOOTH WELL-DEFINED WALLSAND DIPS 66 SE IN UPPER LEVELS BUT SPLITS INTO STRINGERS AND FOOTWALL BRANCHES AT DEPTH WHERE DIP STEEPENS TO 78 SE. ON LOWER LEVEL, VEIN CONSISTS OF SERIES OF EN ECHELON VEINLETS AT 10 TO 15 DEG TO GENERAL TREND F LODE. PRIMARY ORE IAS ARGENIFEROUS GALENA, USUALLY CUBICAL, COARSE-GRAINED, CRUSHED, AND TWINNED, ORE SEPARATED FROM VEIN WALLS BY 0.5-TO 3-INCH CLAY SELVAGE LAYER. ORE ON THIRD LEVEL CONTAINS MORE CHALCOPYRITE,PYRITE, AND SPHALERITE, WITH HIGHER AU VALUES, USUALLY MORE BANDED THANIN UPPER
Deposit LEVELS. ANGLESITE ZONE EXTENDS 180 TO 200 FT DOWN FROM SURFACE, BELOW WHICH IS ZONE OF CU ENRICHMENT CHARACTERIZED BY COVELLITE COATING SPHALERITE AND BLACK SOOTY CHALCOCITE IN FRACTURES AND CAVITIES IN CHALCOPYRITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1984 Schwochow, Stephen D. Colorado Geological Survey

Beyond USGS

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

Maps centered on this site

Authoritative Colorado resources

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