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  3. Mineral Resource Data System (MRDS)

Rambler

Past Producer in Boulder county in Colorado, United States with commodity Tungsten
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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. Economic information about the deposit and operations
  12. Mining district
  13. Mineral rights holdings
  14. Land status
  15. Ownership information
  16. Production statistics
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10190149
MRDS ID DC00104
MAS/MILS ID 80130671
Record type Site
Current site name Rambler
Related records 10108023

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -105.50333, 39.94261 (WGS84)
Elevation 2682
Location accuracy 50(meters)
Relative position Unlabeled shaft on topo matches location shown for shaft on pl. 2 of PP-245.

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Nederland(quadrangle 1:24,000 scale)

Denver West(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Vrain(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Arapaho and Roosevelt 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 Boulder

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 01S 073W 24 C of SE4 Colorado

Comments on the location information

  • 1,500 to 1,800 ft westerly from Tungsten Shaft.

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Ferberite Ore

Mineral occurrence model information

Model code 46
USGS model code 15a
Deposit model name W veins

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

Ore Body (1) -105.50333, 39.94261
ListMap

Economic information

Comments on the ore body information

  • MOST TUNGSTEN VEINS 6IN TO 3FT THICK [From Sharp, 1965, about district in general]
  • Rambler ore was good to 50 ft. depth. (ColoMetalMiningFund, 1960)

Comments on the geologic information

  • TUNGSTEN MINERALIZ. IN CHALCEDONIC QTZ VEINS OF TERTIARY AGE CUTTING PRECAMB. GRANITE AND METAMORPHIC ROCKS. MINUTE CRYS. OF FERBERITE DISSEM. THRU FINE GR. QTZ (HORN ORE), AND COARSELY CRYS. FERBERITE FORMING BRECCIA WITH COUNTRY ROCK AND EARLY QTZ VEINS (SOFT ORE) [From Sharp, 1965, about district in general]
  • Vein strikes N57E, dips 65NW to a depth of 50 ft, where it flattens to 45 NW.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Year of first production 1907
Production years 1907, probably none since 1918

Mining district

District name Boulder Tungsten (Beaver Creek)

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category Private

Ownership information

  • Type Unknown
    Owner SMITH (Joseph M.) & RUGG
  • Type Owner
    Owner Cowdery Brothers
    Year 1953

Comments on the ownership information

  • ColoMetalMiningFund, 1960, lists Owner as George Cowdery; last Operator as Joseph M. Smith.

Production statistics

  • Year 1907
    Material ore
    Ore mined 295.26mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Tungsten Tungsten 13%null%

Comments on the production information

  • BETWEEN 10,000 AND 100,000 UNITS WO3 [From Sharp, 1965, about district in general]. But Colorado Metal Mining Fund Tungsten Mines of Colorado credits "close to 20,000 units".
  • "production said to be 300 tons 'good' ore (probably 10-15% WO3)' (PP-245, p. 97)

Workings at the site

  • Type of workings Underground

Comments on the workings information

  • Colo Metal Mining Fund, 1960, sates "workings consist of an inclined shaft wwith levels at 30, 42, and 75 ft. Lower Rambler main shaft [not labeled on PP-245, pl. 2, therefore locatiion is uncertain] is 200 ft. deep. New level at 187 ft. has 537 ft. of drifting and crosscutting".

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 1983-11-17 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Editor 2007-05-29 Melton, Greg U.S. Geological Survey
Editor 2014-01-10 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate record.
Reporter 1972-07-01 Conservation Division Files U.S. Geological Survey DC00104 = 10108023, merged and deleted.

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.