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Gold Nugget Group

Past Producer in La Plata county in Colorado, United States with commodities Gold, Copper, 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. Geologic structures
  12. Ore body information
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10014108
MRDS ID D010746
MAS/MILS ID 0080677025
Record type Site
Current site name Gold Nugget Group
Alternate or previous names Unpatented Claims: Gold Nugget Nos. 1-3, Old Dominion Group, Gold Nugget No. 1 & 2 Claims, Gold Nugget Claims

Geographic coordinates

Geographic coordinates: -107.52674, 37.51251 (WGS84)
Elevation 2987
Location accuracy 500(meters)
Relative position 21.2 MILES S 20 E FROM SILVERTON, Within 500 m Radius

Site location context

Political divisions (FIPS codes)

La Plata(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Columbine Pass(quadrangle 1:24,000 scale)

Silverton(quadrangle 1:100,000 scale)

Durango(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper San Juan(hydrologic unit)

Upper San Juan(hydrologic accounting unit)

San Juan(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

San Juan National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Weminuche Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Colorado La Plata

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 038N 006W 34 SW Colorado

Comments on the location information

  • (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON HILLSIDE EAST OF VALLECITO CREEK AND SOUTH OF FIRST CREEK CONFLUENCE IN UNSURVEYED SECTION. ELEV AND LAT-LONG GIVEN ARE FOR PROBABLE ADIT SITE BASED ON AIRPHOTO EXAMINATION. ; INFO FROM LAND.ST :1974

Commodities

Commodity Importance
Gold Primary
Copper Primary
Tungsten Critical Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Pyrite Ore
Scheelite Gangue

Analytical data

Result SELECTED SAMPLES ASSAYED 0.42% CU, 0.03 OZ/TON AU, AND 0.52% CU, 0.75 OZ/TON AU

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name Eolus Granite
    Rock description Eolus Granite
    Stratigraphic age (youngest) Precambrian
    Chronological age 1466
    Dating method Rb-Sr
    Stratigraphic age (youngest) Precambrian
    Chronological age 1460
    Dating method K-Ar
    Stratigraphic age (youngest) Precambrian
    Chronological age 1460
    Dating method U-Pb (zircon)
    Type of media Zircon
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Conglomerate
    Rock unit name Vallecito Conglomerate
    Rock description Vallecito Conglomerate

Nearby scientific data

(1) -107.52674, 37.51251
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description San Juan Uplift, San Juan Basin
Type of structure Local
Structure description Needle Mtns Uplift

Ore body information

  • Thickness 1.52M

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1900

Mining district

District name Vallecito Creek Area

Land status

Ownership category National Forest
Area name San Juan N. F.

Comments on the workings information

  • OPEN CUT; 210-FT DRIFT WITH 40-FT WINZE

Comments on development

  • CLAIMS ORIGINALLY STAKED AS OLD DOMINION GROUP; SMALL AMOUNT OF PRODUCTION TREATED AT STAMP MILL BUILT ON VALLECITO CREEK. PROPERTY LEASED IN 1933 TO BAYFIELD RESIDENTS WHO SHIPPED 5 TONS AU-CU ORE TO LEADVILLE; SMELTER RETURNS DID NOT COVER PRODUCTION COSTS. PROPERTY RESTAKED IN 1948 AS GOLD NUGGET NOS. 1-3. IN 1952 CLAIMANT APPLIED TO DMEA FOR CU EXPLORATION LOAN; PROPERTY EXAMINED BY USGS AND USBM.

Reference information

Bibliographic references

  • Deposit

    STEVEN, T.A., AND OTHERS, 1969, MINERAL RESOURCES OF THE SAN JUAN PRMITIVE AREA, COLORADO: USGS BULL. 1261-F. P. 110-112.

Comments on the references

  • All deleted subsidiary records had no references.

General comments

Subject category Comment text
Deposit Merged 5 records into this one. 10014108 includes 10009953, 10118100, and 10142429.
Deposit DEPOSIT CONSISTS OF AU, FE AND CU SULFIDES, AND SCHEELITE OCCURRENCE IN 6- TO 12-INCH WEAKLY SILICIFIED ZONE NEAR EAST-WEST-TRENDING CONTACT BETWEEN VALLECITO CONGLOMERATE AND GRANITE (EOLUS GRANITE?). SECOND DEPOSIT IS CU AND FE SULFIDES AND OXIDES DISSEMINATED ALONG HANGING WALL OF 4- TO 5-FT STEEPLY DIPPING PEGMATITIC QUARTZ VEIN IN VALLECITO CONGLOMERATE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-83 Schwochow, Stephen D. Colorado Geological Survey
Reporter 22-JUL-78 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines
Editor 18-JUL-08 Wilson, Anna B. U.S. Geological Survey

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.