Utopia Mine

Past Producer in Albany county in Wyoming, United States with commodities Gold, Silver, Copper, Platinum

Geologic information

Identification information

Deposit ID 10038156
MRDS ID M045446
MAS/MILS ID 0560010239
Record type Site
Current site name Utopia Mine
Alternate or previous names Utopia Tunnels
Included sites Centennial Ridge District

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -106.15667, 41.28389 (WGS84)
Elevation 2560
Location accuracy 100(meters)
Relative position APPROXIMATELY 1 MI SOUTHWEST OF CENTENNIAL, 1/4 mi. S of Centennial Mine. Adit on pl. 1 of McCallum, 1968.
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Geographic areas

Country State County
United States Wyoming Albany

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 015N 078W 04,09 N2 OF NE4 (09); S2 OF SE4 (04) Wyoming

Comments on the location information

  • ON SECTION LINE. IN MEDICINE BOW NATIONAL FOREST

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Tertiary
Platinum Tertiary

Comments on the commodity information

  • UNVERIFIED REPORT OF PT

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Calcite Gangue
Chlorite Gangue
Dolomite Gangue
Epidote Gangue
Garnet Gangue
Quartz Gangue
Siderite Gangue

Analytical data

Result TR-56 PPM AG, TR-119 PPM AU (CONVERTED TO PPM FROM OZ/TON)

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

Main Entrance (1) -106.15667, 41.28389

Geologic structures

Type Description Terms
Regional Mullen Creek-Nash Fork Shear Zone
Local Flat Fault

Ore body information

  • General form DISSEMINATED IN SHEAR ZONES AND VEINS

Controls for ore emplacement

  • Fractures

Comments on the geologic information

  • SMALL GOLD BODIES IN QUARTZ VEINS IN SCHISTS ARE PROBABLY RELATED TO GRANITE PEGMATITES

Economic information

Economic information about the deposit and operations

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

Mining district

District name Centennial Ridge District

Land status

Ownership category National Forest
Area name Medicine Bow National Forest

Comments on the production information

  • NO PRODUCTION FIGURES AVAILABLE; SMALL PRODUCTION PRESUMED

Comments on the workings information

  • 3 DRIFTS

Comments on development

  • DRIFTS WERE OPENED IN EARLY 1900'S.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M045446
U.S. Bureau of Mines Minerals Availability System MAS 0560010239 =newMRDS 10157199, merged and deleted.

Bibliographic references

  • Deposit

    MCCALLUM, M.E., 1968, THE CENTENNIAL RIDGE GOLD-PLATINUM DISTRICT, ALBANY COUNTY, WYOMING: GEOLOGICAL SURVEY OF WYOMING PRELIMINARY REPORT 7, P. 10.

  • Deposit

    HESS, F.L., 1926, PLATINUM NEAR CENTENNIAL, WYOMING: U.S. GEOLOGICAL SURVEY BULLETIN 780-C, P. 129.

  • Deposit

    HAUSEL, W.D., 1989, THE GEOLOGY OF WYOMING'S PRECIOUS METAL LODE AND PLACER DEPOSITS: GEOLOGICAL SURVEY OF WYOMING BULLETIN 68, P. 100.

General comments

Subject category Comment text
Deposit "Three westerly trending drifts were opened in schists and gneisses of the Mafic Series in the early 1900's near the base of Centennial Ridge aobut one-quarter mile south of the Centennial Mine workings. Small amounts of gold were associated with shear zones, quartz streaks, and garnets in hornblende schists (Dart, 1929). Cross faults were supposedly responsible for cutting off the mineralized zone as was the case in the nearby Centennial tunnels. Minor amount [sic] of gold associated with decomposed hornblende in felsic veins paralleling schistosity were reported from the Utopia workings upslope from the main drifts (Hess, 1926, p. 129). Assays of samples collected from the Utopia tunnels by Dart in 1929 (p.8) range from 0-1.64 ounces of silver and a trace to 3.46 ounces of gold per ton." (McCallum, 1968, p. 10)
Deposit RECORD W032146 HAS BEEN MERGED AND DELETED.
Deposit QUARTZ VEINS AND SHEAR ZONES. VEIN WAS LOST BY A FAULT OFFSET; UNPUBLISHED MODEL NAME: NEW RAMBLER CU-AU-PGE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-75 Blair, Will N. U.S. Geological Survey
Updater 01-SEP-82 Barari, Rachel A. U.S. Geological Survey
Updater 01-AUG-91 Peterson, Jocelyn A. U.S. Geological Survey
Editor 04-AUG-11 Wilson, Anna B U.S. Geological Survey merged and deleted duplicate record MAS 0560010239 = newMRDS 10157199
Reporter 18-NOV-83 Intermountain Field Operations Center (IFOC) U.S. Bureau of Mines MAS 0560010239 = newMRDS 10157199