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Independence Mine

Past Producer in Albany county in Wyoming, United States with commodities Gold, Copper, Silver, Platinum, Iridium, Osmium, Rhodium, Palladium, Nickel
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Geologic information

Identification information

Deposit ID 10098381
MRDS ID M045443
Record type Site
Current site name Independence Mine
Included sites Centennial Ridge District

Comments on the site identification

  • Not to be confused with Independence Mine in the Keystone area.

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -106.18479, 41.28164 (WGS84)
Elevation 2755
Location accuracy 10(meters)
Relative position 2.5 MI SOUTHWEST OF CENTENNIAL. Mine labeled on topo and also on McCallum's pl. 1 (1968, PR-7)
(click for info)

Geographic areas

Country State County
United States Wyoming Albany

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 015N 078W 08 CENTER OF N2 OF SW4 Wyoming

Comments on the location information

  • ON WEST BANK OF MIDDLE FORK LITTLE LARLMIE RIVER. IN MEDICINE BOW NATIONAL FOREST

Commodities

Commodity Importance
Gold Primary
Copper Primary
Silver Primary
Platinum Secondary
Iridium Tertiary
Osmium Tertiary
Rhodium Tertiary
Palladium Tertiary
Nickel Tertiary

Comments on the commodity information

  • TRACE CU AND NI FOUND IN ASSAY

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Limonite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification

Analytical data

Result AU=2.7 PPM, AG=7.5 PPM, PT=9.3 PPM, IR=15.8 PPM, RH=1.04 PPM, OS=3.4 PPM IN ORE SAMPLE. ASSAYS GAVE 0.34-12.3 PPM AU, 2.7-7.5 PPM AG, 0.44-9.3 PPM PT, 0.66 PPM PD. (ALL NUMBERS CONVERTED TO PPM FROM OZ/TON)

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

Main Entrance (1) -106.18479, 41.28164
ListMap

Geologic structures

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

Ore body information

  • General form DISSEMINATIONS AND PODS IN FRACTURES AND BRECCIA, QUARTZ VEINS

Controls for ore emplacement

  • Fractures

Economic information

Economic information about the deposit and operations

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

  • PRODUCTION FIGURES NOT GIVEN; PRESUMED SMALL

Workings at the site

  • Type of workings Underground
    Length 62.48M

Comments on the workings information

  • 1 ADIT, 3 DRIFTS

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS M045443

Bibliographic references

  • Deposit

    MCCALLUM, M.E., 1968, THE CENTENNIAL RIDGE GOLD-PLATINUM DISTRICT, ALBANY COUNTY, WYOMING: GEOLOGICAL SURVEY OF WYOMING PRELIMINARY REPORT 7, P. 9, 11.

  • Deposit

    OSTERWALD, F.W., OSTERWALD, D.B., LONG, J.S., JR., AND WILSON, W.H., 1959, MINERAL RESOURCES OF WYOMING (REVISED ED.): GEOLOGICAL SURVEY OF WYOMING BULLETIN 50, P. 81, 151.

  • Deposit

    HAUSEL, W.D., 1989, THE GEOLOGY OF WYOMING'S PRECIOUS METAL LODE AND PLACER DEPOSITS: GEOLOGICAL SURVEY OF WYOMING BULLETIN 68, P. 97-99.

  • Deposit

    HAUSEL, W.D., 1980, GOLD DISTRICTS OF WYOMING: GEOLOGICAL SURVEY OF WYOMING REPORT OF INVESITGATIONS 23, P. 36.

General comments

Subject category Comment text
Deposit MINERALIZATION PRECEEDED SHEARING AND REMOBILIZATION WAS INSIGNIFICANT. CU AND FE STAINING ARE ABUNDANT; UNPUBLISHED MODEL NAME: NEW RAMBLER CU-AU-PGE.
Deposit "Workings of the Independence Mine are in the same shear zone as those of the Kentucky Derby, and mineralization is quite similar. The mine was opened as a crosscut tunnel which extends about 95 feet into the shear zone and cuts five sulphide enriched "veins". At the second vein, a distance of about 45 feet from the portal, a drift was driven some 25 feet to the southwest along the mineralized trend where it deviates to the south for nearly 50 feet before it again intersects the first "vein" encounted in the main crosscut. The drift then parallels this "vein" for another 45 feet. Gold, silver, and the platinum metals are all associated with the sulphides which occur as fracture and breccia fillings, pods, and small grains disseminated though tectonites. Available assay values range widely both as a function of sample source and assayer (Table 1). Osterwald (1959, p. 75 and 135) lists the following values from "mine-run ore": 0.08 oz gold, 0.22 oz silver, 0.27 oz platinum, 0.46 oz iridium, 0.0302 oz rhodium, and 0.1002 oz osmium per ton of ore. NRRI tests on sulphide samples from the second "vein" failed to show any platinum group metals, but 0.01 oz gold aond 0.08 oz silver per ton and traces of copper and nickel were reported." (McCallum, 1968, p. 11)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-75 Blair, Will N. U.S. Geological Survey
Updater 01-JUL-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