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Dorothy and Katie Mines

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. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10017518
MRDS ID DC03701
Record type Site
Current site name Dorothy and Katie Mines
Alternate or previous names Dorthy-Katie Mines, Katie - Dorothy Mines, Dorothy, Katy, Dorothy-Katie

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
Main Entrance -105.36979, 40.01448 (WGS84) 100 Katie mine, ALONG MILLIONAIRE GULCH, south of Sugarloaf Rd.
(click for info)
Main Entrance -105.37222, 40.01187 (WGS84) 100 Dorothy mine, farther up Millionaire Gulch.

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Boulder(quadrangle 1:24,000 scale)

Estes Park(quadrangle 1:100,000 scale)

Greeley(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 01N 71W 29; 32 SW4; NW of NW of NW Colorado

Comments on the location information

  • "Map sources" for Colo Metal Mining Fund, 1960 listed as "George H. Teal"
  • 2 entries for mine location, one each for Katie and Dorothy. Locations probably from Mine Map Repo as the names do not appear on maps in any of the other references cited.

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Ferberite Ore
Apatite Gangue
Tetrahedrite Unknown
Quartz Unknown
Hematite Unknown

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

Nearby scientific data

Main Entrance (1) -105.36979, 40.01448
ListMap
Main Entrance (2) -105.37222, 40.01187
ListMap

Economic information

Comments on the ore body information

  • ore is mainly near the Dorothy-Katie intersection.
  • MOST TUNGSTEN VEINS 6IN TO 3FT THICK (Sharps, 1965, about the district as a whole)

Comments on the geologic information

  • FERBERITE-QUARTZ VEINS IN COARSE-GRAINED MODERATELY GNEISSIC GRANITE
  • 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) [Sharps, 1965, about the district in general]

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Mining district

District name Sugar Loaf
District name Boulder Tungsten District

Ownership information

  • Type Owner
    Owner A.T. Barr and R.C. Barr
    Year 1960
  • Type Operator
    Owner Boulder Tungsten Mines, Inc.
    Year 1960

Comments on the production information

  • BETWEEN 10,000 AND 100,000 UNITS WO3 [Sharps, 1965, p. 4]

Reference information

Bibliographic references

Comments on the references

  • There is much data in both PP-245 and DMA-1651 that has not been incorporated into this record.

General comments

Subject category Comment text
Deposit SIGNIFICANT COMMERCIAL ORE WAS DISCOVERED

Reporter information

Type Date Name Affiliation Comment
Reporter 1973-03-01 Conservation Division Files U.S. Geological Survey
Updater 1974-01-01 Unknown U.S. Geological Survey
Editor 2013-12-20 Wilson, Anna B U.S. Geological Survey merged and deleted far too many duplicate records.
Reporter 1983-11-17 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines MAS 0080130447 = 10287437 and MAS 0080130255 = 10166005.
Reporter 1972-07-01 Conservation Division Files U.S. Geological Survey DC00092 = 10015978
Reporter 1978-04-01 Hassler, J. William U.S. Geological Survey D003257 = 10107903

Beyond USGS

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

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.