| Deposit ID | 10098381 |
|---|---|
| MRDS ID | M045443 |
| Record type | Site |
| Current site name | Independence Mine |
| Included sites | Centennial Ridge District |
| 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) |
Political divisions (FIPS codes)
Albany(county)
Wyoming(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Centennial(quadrangle 1:24,000 scale)
Saratoga(quadrangle 1:100,000 scale)
Rawlins(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Laramie(hydrologic unit)
North Platte(hydrologic accounting unit)
North Platte(hydrologic subregion)
Missouri(hydrologic region)
Federal lands
Medicine Bow-Routt National Forest(National Forest)
National Forest FS(Type of land area)
FS(Federal land areas administered by FS)
| Country | State | County |
|---|---|---|
| United States | Wyoming | Albany |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| 6th Principal | 015N | 078W | 08 | CENTER OF N2 OF SW4 | Wyoming |
| Commodity | Importance |
|---|---|
| Gold | Primary |
| Copper | Primary |
| Silver | Primary |
| Platinum Critical | Secondary |
| Iridium Critical | Tertiary |
| Osmium | Tertiary |
| Rhodium Critical | Tertiary |
| Palladium Critical | Tertiary |
| Nickel Critical | Tertiary |
| Materials | Type of material |
|---|---|
| Gold | Ore |
| Pyrite | Ore |
| Limonite | Gangue |
| Quartz | Gangue |
| 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 or associated | Host | ||||
|---|---|---|---|---|---|
| Rock type | Metamorphic Rock > Amphibolite | ||||
| |||||
| Main Entrance (1) | -106.18479, 41.28164 |
|---|
| Type of structure | Regional |
|---|---|
| Structure description | Mullen Creek-Nash Fork Shear Zone |
| Type of structure | Local |
| Structure description | Shear Zones |
| General form | DISSEMINATIONS AND PODS IN FRACTURES AND BRECCIA, QUARTZ VEINS |
|---|
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| District name | Centennial Ridge District |
|---|
| Ownership category | National Forest |
|---|---|
| Area name | Medicine Bow National Forest |
| Type of workings | Underground |
|---|---|
| Length | 62.48M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | M045443 |
MCCALLUM, M.E., 1968, THE CENTENNIAL RIDGE GOLD-PLATINUM DISTRICT, ALBANY COUNTY, WYOMING: GEOLOGICAL SURVEY OF WYOMING PRELIMINARY REPORT 7, P. 9, 11.
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.
HAUSEL, W.D., 1989, THE GEOLOGY OF WYOMING'S PRECIOUS METAL LODE AND PLACER DEPOSITS: GEOLOGICAL SURVEY OF WYOMING BULLETIN 68, P. 97-99.
HAUSEL, W.D., 1980, GOLD DISTRICTS OF WYOMING: GEOLOGICAL SURVEY OF WYOMING REPORT OF INVESITGATIONS 23, P. 36.
| 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) |
| 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 |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.