Bald Mountain Thorium-Rare Earth Deposit

The Bald Mountain Thorium-Rare Earth Deposit is a titanium, thorium, and ree mine located in Sheridan county, Wyoming at an elevation of 8,799 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Bald Mountain Thorium-Rare Earth Deposit
Secondary: Bald Mtn Thorium-Rare Earth Deposit
Secondary: Bald Mtn Monazite Deposit

Commodity

Primary: Titanium
Primary: Thorium
Primary: REE
Secondary: Gold
Tertiary: Zirconium
Tertiary: Iron

Location

State: Wyoming
County: Sheridan
District: Big Horn District

Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Type: Located Claim

Workings

Type: Surface

Ownership

Owner Name: Dr. Scott Nickerson
Percent: 100.0
Home Office: Wyoming
Info Year: 1982

Production

Year: 1903
Description: Unknown Amount Of Au Conc Was Produced

Deposit

Record Type: Deposit
Operation Category: Past Producer
Operation Type: Unknown
Mining Method: Open Pit
Milling Method: Gravity
Years of Production:
Organization:
Significant: Y

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Monazite
Unknown: Hematite
Unknown: Ilmenite
Unknown: Limonite
Unknown: Magnetite
Unknown: Microcline
Unknown: Orthoclase
Unknown: Plagioclase
Unknown: Quartz
Unknown: Zircon
Unknown: Garnet

Comments

Comment (Reserve-Resource): THE RESERVES AND GRADES IN Q-MATRIX 1 COL 1 WERE USED FOR THIS EVALUATION. THE RESERVES AND GRADES SHOWN IN COL 2 ARE A HIGH GRADE ZONE WITHIN THE RESERVES OF COL 1. THE RARE EARTH OXIDE GRADE WAS CALCULATED FROM DATA PROVIDED IN U.S. BUMINES RI-5917, PP. 2-3. THE SAMPLES USED TO DERIVE THESE DATA CONTAIN A DISPROPORTIONATE AMOUNT OF THE HIGH GRADE STRATUM. CONSEQUENTLY, THE RARE EARTH GRADE IS SOMEWHAT ABOVE AVERAGE GRADE. THIS GRADE WAS NOT USED TO CALCULATE CONCENTRATE OUTPUT OR OTHER DATA OF THE MATERIALS BALANCE.

Comment (Economic Factors): THE PIT SURFACE AREA INCLUDES THE MAJOR EXCAVATION ALONG THE SOUTH SLOPE OF ROOSTER KNOB AND A SMALL PIT LOCATED 4 KM TO THE SOUTHEAST. SEE LOCATION MAP OF REPORT. PIT DIMENSIONS WERE ESTIMATED FROM THE LIMITS OF THE CONGLOMERATE(OREBODY) AND DRILL HOLE LOCATIONS SHOWN IN RME-3128, P. 40. ACTUAL SURFACE DIMENSIONS ARE APT TO BE SMALLER. PIT DEPTH WILL AVERAGE 6.7 METERS AND ALL MATERIAL WILL BE TAKEN AS ORE; THE ORE GRADES INCLUDE DILUTION BY LEAN ORE AND OVERBURDEN. BECAUSE OF THE SHALLOW DEPTH OF THE PIT, ONLY ONE BENCH WILL BE REQUIRED, AND A PIT WALL OF 90 DEGREES WILL PROBABLY BE MAINTAINED.

Comment (Reserve-Resource): UNLIKELY TO BE WORKED BECAUSE OF LOW GRADE

Comment (Reserve-Resource): REO (RARE EARTH OXIDE)

Comment (Deposit): from deleted record 560030161 = 10229770: LOCATED IN THE BASAL CONGLOMERATE OF THE DEADWOOD FM OF MIDDLE CAMBRIAN AGE. THICKNESS VARIES BETWEEN 2.5 TO 10 FT. MICROSCOPIC ANALYSIS: ILMENITE 38.3%, MONAZITE 8.7%, MAGNETITE 4.0%, ZIRCON 2%, IMPURITIES 48.8%. AVG THO2= 8.8%. AVG GOLD 0.003 OZ PER TON.

References

Reference (Deposit): Wilson, W.H., 1966, Mineral Resource of Wyoming: Geological Survey of Wyoming Bulletin 50, p. 220.

Reference (Production): KELLY, F.J. TECHNOLOGICAL AND ECONOMIC PROBLEMS OF RARE-EARTH METAL AND THORIUM RESOURCES IN COLORADO, NEW MEXICO, AND WYOMING, USBM IC-8124, 1962, PP. 5-10, 25-31.

Reference (Geology): MCKINNEY, A.A. H.W. HORST. DEADWOOD CONGLOMERATE MONAZITE DEPOSIT BALD MOUNTAIN AREA, SHERIDAN AND BIG HORN COUNTIES, WYOMING, RME-3128, USAEC, USBM, MARCH 1953.

Reference (Reserve-Resource): BORROWMAN, S.R. J.B. ROSENBAUM, RECOVERY OF THORIUM FROM A WYOMING ORE, USBM RI-5917 PP. 1-8.

Reference (Ownership): COSGROVE, D. PERSONAL COMMUNICATION, JAN. 1983 WITH MAS EVALUATOR.

Reference (Ownership): NICKERSON, S. DR. CLAIMS HOLDER, PERSONAL COMMUNICATION, JAN. 1983.

Reference (Geology): WILSON, W.H. RADIOACTIVE MINERAL DEPOSITS OF WYOMING, GEOLOGICAL SURVEY OF WYOMING, USBM RI-NO. 7, P. 7.

Reference (Production): SHANNON S.S. MONAZITE AND RELATED MINERALS, INDUSTRIAL MINERALS AND ROCKS, 4TH EDITION, AIME, 1975, PP. 851-859.

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