Solaris Resources Inc. reported results from metallurgical test work on its Warintza Project in southeastern Ecuador. The Company commissioned FLSmidth USA Inc. (“FLS”) to complete comminution and metallurgical flotation test work programs. The metallurgical test work program at FLS included comminution grind studies on two master composites, ore characterization, grinding indices, rougher and cleaner flotation tests, locked cycle testing and variability rougher kinetics flotation tests. The objective of the test work was to evaluate the metallurgical flotation response of the master composites and variability samples, establish metal recoveries, evaluate if any deleterious elements were present, and assess whether clean, high-grade concentrates could be produced with industry standard processing practices and reagents.

The metallurgical samples were taken from three drill holes specifically drilled for metallurgical test work. The hole depths range from 500m to 960m with sample selection ranging from 46m below surface to a depth of 450m. Seven samples which consisted of 20m intervals of half core were selected for the test work program for a total weight of 651kg of sample material.

The samples were selected from the Warintza Central deposit to represent the mineralization, metal grades, and lithology type which formed the first pit phases of the MRE. FLS completed six rougher flotation tests on MC #1 and five rougher flotation tests on MC #2. In both composites, the copper recovery does not appear to be influenced significantly by pH, grind size, or collector dosages. The rougher flotation tests focused on primary grind size, pH, and collector dosage as the variables for influencing the flotation behavior.

The collector used in all tests is Cytec Aero 8989 for copper and burner oil as a molybdenum collector. Below is a summary of MC #1 and #2 tests at various grind sizes and pH.