Overview
Location
Utah, United States (Slick Rock, Colorado Plateau)
Ownership
100% IsoEnergy
Deposit Type
Tabular sandstone-hosted
Primary Minerals
Uranium, Vanadium
Stage
Past-producing
Proximity to White Mesa Mill
54 mi (87 km)
Highlights
- Sage Plain property in located in the Slick Rock District 15 miles northeast of Monticello, Utah and 54 road miles from the White Mesa Mill
- The property consists of two fee mineral leases covering about 960 acres (Calliham and Crain) and a Utah State lease of 640 acres. It also consists of a high vanadium-to-uranium ratio
- The Calliham mine property was explored in the early 1970s by Hecla Mining Company. The lease was acquired by Atlas and the mine was brought into production in 1976. It operated again briefly in 1990-1991
- All infrastructure from the historic mine has been removed and all permits have lapsed however, the underground workings remain relatively intact and the declines could be reestablished for quick re-entry
Historical Mineral Resource Estimate
Category | Tonnes (000s) | Grade (%U3O8) |
Contained U3O8 (000s lbs) |
Grade (%V2O5) |
Contained V2O5 (000s lbs) |
---|---|---|---|---|---|
Measured | 240 | 0.16 | 772 | 1.32 | 6,349 |
Indicated | 13 | 0.10 | 26 | 0.77 | 199 |
Inferred | 10 | 0.13 | 25 | 0.94 | 188 |
Notes:
1) Grades and tonnages shown as diluted amounts.
2) Vanadium grades are based on assays where known, otherwise estimated at the average V 2 O 5 :U 3 O 8 ratios for the individual properties used by previous operators based on core assay data and past production.
3) Mineral Resources were classified in accordance with CIM Definition Standards.
For additional information on the Sage Plain Project, please refer to the Technical Report entitled “UPDATED TECHNICAL REPORT ON SAGE PLAIN PROJECT (Including the Calliham Mine)”, prepared by Douglas C. Peters, CPG of Peters Geosciences, dated March 18, 2015.
This resource is a historical estimate under National Instrument 43-101 – Standards of Disclosure for Mineral Projects ("NI 43-101") and a qualified person has not done sufficient work to classify the historical estimate as current mineral resources. As a result, the historical estimate is not being treated as a current mineral resource.
Historical Production – Calliham Mine
Operator | Tons (000s) | %U3O8 | lbs U3O8 (000s) | %V2O5 | lbs V2O5 (000s) |
---|---|---|---|---|---|
Atlas | 209 | 0.15 | 605 | .090 | 3,773 |
Umetco | 13 | 0.21 | 56 | 1.29 | 343 |
Total | 221 | 0.15 | 661 | 0.93 | 4,116 |
The Calliham Mine was in production from the 1970s to the early 1980s by Atlas Minerals. The Calliham Mine property was explored in the early 1970s by Hecla Mining Company. The Calliham lease was acquired by Atlas Minerals and went into production in March 1976. Atlas Minerals departed the uranium business in the region in the mid-1980s. The Calliham Mine and associated leases were acquired by Umetco Minerals (“ Umetco ”) in 1988 and operated briefly in 1990-1991 during a spike in vanadium prices. During Umetco’s tenure, the Calliham Mine produced 13,300 tons of ore averaging 0.21% U 3 O 8 (~56,000 lbs. U 3 O 8 ) and 1.29% V 2 O 5 (~343,000 lbs. V 2 O 5 ). This ore was milled at the White Mesa Mill near Blanding, Utah. All infrastructure from the historic mine has been removed and all permits have lapsed.