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This 2021 Pre-Feasibility Study (PEA) by P&E Mining Consultants Inc. outlines the proposed recovery methods for the Thierry Project, operated by Braveheart Resources Inc. The report assumes a conventional processing facility designed for an underground mine with a nominal throughput of 4,000 tpd. The flowsheet includes crushing, grinding, flotation, and tailings management for paste backfill preparation.

This Preliminary Economic Assessment (PEA) outlines two processing flowsheet options for the J&L Milling Plant, managed by Huakan. Both options utilize a similar processing sequence including crushing, Heavy Media Separation (HMS), grinding, flotation, pressure oxidation, and cyanidation. The primary distinction lies in the concentrate strategy: Option A produces a single saleable lead concentrate with zinc recovery via hydrometallurgy, while Option B produces separate lead and zinc concentrates. The plant is designed for a throughput of 1,500 tonnes per day, processing ore with average feed grades of 6.42 g/t Au, 69.78 g/t Ag, 2.2% Pb, and 3.6% Zn.

This NI 43-101 Technical Report and Preliminary Economic Assessment outlines the recovery methods and processing design for the Kwanika-Stardust Project. The plant is designed to process an average of 22,000 tonnes per day of mineralized material, with a total mill life of approximately 94 million tonnes. The flowsheet is based on preliminary testwork and financial evaluations, utilizing standard technologies widely used in copper flotation plants. The project focuses on the recovery of copper and gold from sulphide ore through a comprehensive comminution and flotation circuit.

The Allan mine has been successfully mining and concentrating potash ore to produce saleable quantities of high-grade finished potash products since 1968. The facility produces granular, standard, and industrial grade potash primarily used for agricultural applications and industrial purposes. Products are sold and shipped to markets in North America and offshore.

This NI 43-101 Technical Report covers the Middle Tennessee Mines (MTM) project, operated by Nyrstar. ERL acts as a royalty holder for the project and is exempted under Section 9.2 of NI 43-101 from providing direct operational disclosure as the information is not available to them. The report relies on technical data provided by Nyrstar in November 2021.