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  3. Mineral Resource Data System (MRDS)

Grand Republic

Occurrence in Boulder county in Colorado, United States with commodity 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. 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. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10018198
MRDS ID DC05043
Record type Site
Current site name Grand Republic
Related records 10287164

Geographic coordinates

Geographic coordinates: -105.37759, 40.03409 (WGS84)
Relative position SW 1/4 NE 1/4 SE 1/4

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)

Geographic areas

Country State County
United States Colorado Boulder

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 01N 71W 19 Colorado

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46
Model code 84
USGS model code 22b
Deposit model name Alkaline Au-Te (Au-Ag-Te veins)
Mark3 model number 80

Host and associated rocks

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

Nearby scientific data

(1) -105.37759, 40.03409
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: GRANITE CUT BY PEGMATITE AND APLITE DIKES. HOOSIER BRECCIA REEF OFFSET 100 FT. BY GRAND REPUBLIC VEIN. GOLD TELLURIDES WITH PYRITE CHIEF ORE MINERALS

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Mining district

District name Gold Hill

Reference information

Bibliographic references

  • Deposit

    LOVERING & GODDARD, 1950, USGS P.P. 223, PG. 251-253

  • Deposit

    USGS GOLD HILL TOPO QUAD, 1957, 7 1/2 MIN

  • Deposit

    CONSV. DIV. COMP. DATE, 1,62

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1973 Conservation Division Files U.S. 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.