This report presents a preliminary feasibility study for the Sheep Mountain uranium project in Fremont County, Wyoming, with an effective date of December 31, 2021.
Report context
The "Preliminary Feasibility Study for the Sheep Mountain Project, Fremont County, Wyoming, USA" is a US SEC Subpart 1300 Regulation S-K compliant report and a National Instrument 43-101 Standards of Disclosure for Mineral Projects technical report. The effective date of the report is December 31, 2021. The project includes the Congo Open Pit and the Sheep Underground mineral deposits. The report covers mineral resource and reserve estimates, mining methods, and mineral processing and metallurgical testing.
Processing route
Historic Mineral Processing
The report includes a section on historic mineral processing (Section 13.1). This covers past operating data from the project area.
Pre-Feasibility Metallurgical Studies
Pre-feasibility metallurgical studies are described in Section 13.2. These studies were conducted as part of the preliminary feasibility assessment.
Column Leach Studies
Column leach studies are reported in Section 13.3. These tests were performed to evaluate leaching characteristics of the mineralized material.
Supplemental Laboratory Experiments
Supplemental laboratory experiments are detailed in Section 13.4. These additional tests supported the metallurgical understanding of the project.
Current Metallurgical Background and Industry Practice
Section 13.5 provides context on current metallurgical background and industry practice relevant to the Sheep Mountain Project.
Opinion of Author
Section 13.6 contains an opinion of the author regarding the metallurgical testing and processing approach.
Mine Productivity and Scheduling
Mining methods for the Congo Open Pit and Sheep Underground are described in Section 16.0. Mine productivity and scheduling information is provided in Section 16.2.
Site Layout and Construction
Section 17.0 covers recovery methods, including site layout and construction (Section 17.2).
Key reported parameters
| Parameter | Value | Basis |
|---|---|---|
| Congo Open Pit resource estimate | Reported in Section 14.2.1 | Drill hole database and GT contour method |
| Sheep Underground resource estimate | Reported in Section 14.2.2 | Drill hole database and GT contour method |
| Grade capping | Reported in Section 14.3.1 | Statistical analysis |
| Past production – Congo Open Pit | Reported in Section 14.5.1 | Historical operating data |
| Past production – Sheep Underground | Reported in Section 14.5.2 | Historical operating data |
| Resource classification | Reported in Section 14.6 | Classification methodology |
| Cut-off grade | Reported in Section 15.4 | Mining and mineral processing recovery parameters |
| Mining recovery parameters | Reported in Section 15.4.1 | Sensitivity analysis |
Project website: https://investors.energyfuels.com/2020-02-28-Energy-Fuels-Files-Updated-Preliminary-Feasibility-Study-for-Sheep-Mountain-Uranium-Project
Technical qualifications
The technical report was prepared by qualified persons as defined under National Instrument 43-101. The report states specific qualifications of the authors, including professional geologist (P.G), professional engineer (PE), and Doctor of Science (D. Sc.) credentials, along with SME Registered Member status. The report is compliant with US SEC Subpart 1300 Regulation S-K and National Instrument 43-101 Standards of Disclosure for Mineral Projects.
Source: "Preliminary Feasibility Study for the Sheep Mountain Project, Fremont County, Wyoming, USA," effective December 31, 2021.
