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Mary Lee Mine

Past Producer in Park county in Colorado, United States with commodities Beryllium, Tungsten, Molybdenum, Uranium, REE, Lead, Zinc, Arsenic, Iron, Copper, Tin
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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. 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 10013792
MRDS ID D010281
Record type Site
Current site name Mary Lee Mine
Alternate or previous names Little Bear Mine, Little Bear No. 2 Mine
Related records 10142901

Geographic coordinates

Geographic coordinates: -105.42891, 39.07583 (WGS84)
Elevation 2621
Relative position 7.6 MILES N 29 W OF LAKE GEORGE (TOWN)

Site location context

Political divisions (FIPS codes)

Park(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tarryall(quadrangle 1:24,000 scale)

Bailey(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Platte Headwaters(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Pike and San Isabel National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado Park

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 011S 072W 22 E2 OF NE OF SW OF W2 OF NW OF NW OF SE Colorado

Comments on the location information

  • MARY LEE MINE AREA ; INFO FROM LAND.ST :(1976)

Commodities

Commodity Importance
Beryllium Critical Primary
Tungsten Critical Secondary
Molybdenum Tertiary
Uranium Tertiary
REE Critical Tertiary
Lead Tertiary
Zinc Critical Tertiary
Arsenic Critical Tertiary
Iron Tertiary
Copper Tertiary
Tin Critical Tertiary

Comments on the commodity information

  • NONPEGMATITIC BERYLLIUM DEPOSITS; BERYL OCCURS AS HEXAGONAL CRYSTALS AND MASSIVE POIKILOBLASTIC GRAINS.

Materials information

Materials Type of material
Bertrandite Ore
Beryl Ore
Cassiterite Ore
Chalcopyrite Ore
Covellite Ore
Euclase Ore
Galena Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Uraninite Ore
Wolframite Ore
Barite Gangue
Fluorite Gangue
Muscovite Gangue
Quartz Gangue
Siderite Gangue
Topaz Gangue

Alteration

  • (Local) Greisenization

Analytical data

Result MASSES OF GALENA CONTAIN 0.3-0.7% AG, 0.3-1.5% BI, 0.007-0.7% CU
Result 0.003% BE, 0.015% CU, 0.15% PB, 0.003% SN
Result SAMPLES TAKEN 1959-1969: 0.0003-0.0015% BE, 0.00007-0.0003% AG, 0.003-0.07% CU, 0.0015-0.007% MO, 0.007-0.15% PB, 0.0007-0.007% SN, 0.03-0.07% ZN
Result 1968 SAMPLES: 1-30 PPM AG, 3-70 PPM BE, 15-10,000 PPM CU, 15-150 PPM MO, 50-GT 10000 PPM PB, 7-150 PPM SN, 150-10000 PPM W, 300-GT 10000 PPM ZN

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Redskin Granite;Boulder Creek Granodiorite
    Rock description Redskin Granite;Boulder Creek Granodiorite
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Nearby scientific data

(1) -105.42891, 39.07583
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Tarryall Mountains, Front Range, Puma Hills, Badger Flats
Type of structure Local
Structure description Badger Flats Fault, Minor Faults, Round Mountain Syncline

Ore body information

  • General form CUPOLAS, PODS, IRREGULAR LENSES
    Length 426.72M

Controls for ore emplacement

  • Greisenized Rocks; Localized By Fissures, Contacts, Favorable Rock Units

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1957
Discoverer Bob Beal And Roy Monett

Mining district

District name Lake George (Badger Flats) Beryllium Area (Mountain Dale District)

Land status

Ownership category National Forest

Ownership information

  • Type Owner
    Owner U.S. Beryllium Corp.
    First year 1963

Comments on the production information

  • SMALL PRODUCTION OF BERYL (PROBABLY L.T. 5 TONS) AS OF 1969; POSSIBLY SOME W

Workings at the site

  • Type of workings Underground
    Area 0.175HA
    Length 121.92M
    Overall depth 12.19M
    Overall length 304.8M
    Overall width 6.1M

Comments on the workings information

  • MAIN WORKINGS ON EASTERN PART OF VEIN, COMPRISED OF 2 ADITS, 1 INCLINE; SHALLOW SHAFT AT WESTERN END OF VEIN. ONE ADIT 105-FT LONG, THE OTHER 120-FT LONG

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit THE REDSKIN STOCK IS ZONED, WITH NEARLY ALL OF THE BERYLLIUM DEPOSITS OCCURRING IN THE GRANITE-APLITE OR PORPHYRITIC GRANITE FACIES OF THE GREISENIZED REDSKIN GRANITE. EVEN THOSE DEPOSITS NOT ACTUALLY IN THE REDSKIN GRANITE ARE SPATIALLY AND GENETICALLY RELATED TO IT.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1983 Collins, Donna B. 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.