This Preliminary Economic Assessment report presents metallurgical testwork and a proposed processing route for the Tres Cruces Oxide Project in northern Peru, with an effective date of 17 August 2023.
Report context
This technical report, prepared as a Preliminary Economic Assessment under Form 43-101F1, carries an effective date of 17 August 2023 and was issued on 21 August 2023 as Revision 0. The report concerns the Tres Cruces Oxide Project located in northern Peru. The documented work includes metallurgical testwork phases, sample origins, testwork results, and process development activities undertaken to support the proposed processing design.
Processing route
Testwork Phases and Sample Origins
The mineral processing and metallurgical testing program was conducted in multiple phases. Sample origin details are provided in Section 13.2 of the report. Chemical characterization was performed under the Plenge 2022 program, with results reported in Section 13.3.1.
Mineralogy and Comminution
Mineralogical characterization of the Tres Cruces oxide material is described in Section 13.4. Comminution testing was conducted and is documented in Section 13.5, with specific results for bottle roll leaching presented in Section 13.5.1.
Leach Testing
Bottle roll leach testing was undertaken as part of the comminution testwork program. Column leaching testwork was conducted and is described in Section 13.6.1.
Flotation Testwork
Flotation testwork was performed and is reported in Section 13.6.
Process Development and Deleterious Components
Process development activities are described in Section 13.7. An assessment of deleterious components was conducted, with findings presented in Section 13.8. A specific evaluation of preg robbing characteristics is documented in Section 13.8.1.
Recovery Predictions and Geometallurgical Mapping
Recovery predictions based on the metallurgical testwork are provided in Section 13.9. Geometallurgical mapping was undertaken and is reported in Section 13.10, with reagent consumption estimates presented in Section 13.10.1.
Sulphide Material Conclusions
Conclusions regarding the processing of sulphide material are documented separately in Section 13.11.
Key reported parameters
| Parameter | Unit | Reported Value | Basis |
|---|---|---|---|
| Chemical characterization | , | Results reported (Plenge 2022) | Testwork |
| Mineralogy | , | Described in Section 13.4 | Testwork |
| Comminution testing | , | Results reported in Section 13.5 | Testwork |
| Bottle roll leaching | , | Results reported in Section 13.5.1 | Testwork |
| Flotation testwork | , | Results reported in Section 13.6 | Testwork |
| Column leaching | , | Results reported in Section 13.6.1 | Testwork |
| Process development | , | Described in Section 13.7 | Proposed design |
| Deleterious components assessment | , | Results reported in Section 13.8 | Testwork |
| Preg robbing evaluation | , | Results reported in Section 13.8.1 | Testwork |
| Recovery predictions | , | Reported in Section 13.9 | Testwork based |
| Geometallurgical mapping | , | Reported in Section 13.10 | Testwork |
| Reagent consumption | , | Estimates in Section 13.10.1 | Testwork based |
| Sulphide material conclusions | , | Reported in Section 13.11 | Testwork based |
Project website: https://miningdataonline.com/property/896/Tres-Cruces-Project.aspx
Technical qualifications
This report is a Preliminary Economic Assessment as defined under National Instrument 43-101. The technical report includes certificates of qualified persons in Appendix A, which constitute the date and signature of the report in accordance with Form 43-101F1. The effective date of this report is 17 August 2023. The report does not present feasibility-level design details for the processing flowsheet, and all processing parameters are based on the metallurgical testwork phases and process development activities described within the report sections.
Source: Tres Cruces Oxide Project, Form 43-101F1 Technical Report Preliminary Economic Assessment, M3-PN230215, Revision 0, 21 August 2023, Sections 13 and 14.
