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  3. Mineral Resource Data System (MRDS)

Yellow Girl

Past Producer in Boulder county in Colorado, United States with commodities Fluorine-Fluorite, Gold
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Mineral rights holdings
  14. Land status
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10117714
MRDS ID DC03453
MAS/MILS ID 0080130002
Record type Site
Current site name Yellow Girl
Alternate or previous names Allied Jamestown, Yellow Girl Tunnel

Geographic coordinates

Geographic coordinates: -105.39479, 40.12248 (WGS84)

Site location context

Political divisions (FIPS codes)

Boulder(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Gold Hill(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 002 N 072 W 24 E2 NE Colorado

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary
Gold Secondary

Materials information

Materials Type of material
Calcite Unknown
Fluorite Unknown
Galena Unknown
Kaolinite Unknown
Pyrite Unknown
Quartz Unknown

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -105.39479, 40.12248
ListMap

Economic information

Ore body information

  • Area 1HA
    Field Value
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FAULTING
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 PROPYLITIC
    Total Surface Area (HA) 1
    Date of Last Modification 780921

Comments on the geologic information

  • VEIN MADE UP OF COARSE FLUORITE FRAGMENTS, IN MATRIX OF FINE GR FLUORITE, CLAY MINERALS, QTZ, SIDERITE (from deleted MRDS DC04718 = newMRDS 10108332)
  • VEIN STRIKES NORTH. ORE AND SULFIDE MIN: COARSE GR. AND FINE GR. PURPLE FLUORSPAR, SOME PYRITE, A LITTLE GALENA. AVE. 58% CAF2 IN 1942

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Both
Significant No
Discovery year 1970

Mining district

District name Jamestown Area

Mineral rights holdings

Type of mineral rights Patented

Land status

Ownership category National Forest

Ownership information

  • Type Owner-Operator
    Owner Allied Chemical Corp., Industrial Chemicals Division
    Home office Colorado
    Year 1972

Workings at the site

  • Type of workings Underground
    Overall depth 130M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics NO PLANES OF WEAKNESS
    Rock Support Chars. SUPPORTING
    Mine Support Chars. TIMBER
    Slope of Inclines 9
    Avg. Length of Adits (m) 70
    1st Condition of Workings OPEN
    2nd Condition of Workings NO MINE ENTRY
    3rd Condition of Workings NO MINE ENTRY
    Capacity 45.4
    Capacity Units MT ORE/DAY
    Units of Production $/MT ORE
    Year of Information 1973

Reference information

Bibliographic references

  • Deposit

    MINE MAP REPO # 402332 404835 AND OTHERS

  • Deposit

    VANDERWILT MIN RESOURCES OF COLO P 324

  • Deposit

    LOVERING AND GODDARD, 1950, USGS PP 223, PG 279, FIG 77.

  • Deposit

    GODDARD, COLO. SCI. SOC. PROC., V. 15, NO. 1, PG. 45-47, PL. 11.

  • Deposit

    CONSV. DIV. COMP. DATE, 10,62

Reporter information

Type Date Name Affiliation Comment
Reporter 13-MAY-85 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Editor 26-JUL-11 Wilson, Anna B U.S. Geological Survey Merged and deleted 2 duplicate records 10108238 and 10262873
Reporter 01-MAR-73 Conservation Division Files U.S. Geological Survey MRDS DC04718 = newMRDS 10108332 and MRDS DC03453 = newMRDS 10180238
Reporter 01-JAN-74 Unknown U.S. Geological Survey MRDS DC04718 = newMRDS 10108332 and MRDS DC03453 = newMRDS 10180238

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.