April 3, 2023 – Vancouver, B.C. – Solaris Resources Inc. (TSX: SLS; OTCQB: SLSSF) (“Solaris” or the “Company”) is pleased to report assay results from a series of holes aimed at growing mineral resources and the identification of a second, higher grade porphyry center opening up extension potential to the south at the Warintza East discovery within its Warintza Project (“Warintza” or “the Project”) in southeastern Ecuador. Highlights are listed below, with a corresponding image in Figure 1 and results in Tables 1-2.

Highlights

Warintza East was discovered in July 2021, with only eight holes completed prior to the cut-off for inclusion in the Warintza Central Mineral Resource Estimate (“MRE”)¹ in April 2022. Subsequent drilling has significantly expanded the dimensions of the deposit to the north, east and south, where it remains open. Recent drilling has now validated a southern vector toward stronger soil anomalism, identifying a second porphyry center producing higher grade mineralization and opening up further expansion potential in this direction.

SLSE-23 was collared in the middle of the Warintza East drill grid and drilled north, returning 626m of 0.50% CuEq² from surface within a broader interval of 746m of 0.46% CuEq², expanding the footprint to the north where it remains open

SLSE-24 was collared at the southeastern limit of the grid and drilled southwest into an open volume, returning 156m of 0.52% CuEq² from near surface within a broader interval of 410m of 0.30% CuEq², extending mineralization to the southwest where it remains open

SLSE-20 was collared in the middle of the drill grid and drilled east, returning 292m of 0.45% CuEq² from surface within a broader interval of 900m of 0.30% CuEq², expanding the footprint to the east where it remains open

SLSE-21 was collared at the southeastern limit of the grid and drilled east, returning 198m of 0.40% CuEq² within a broader interval of 1,040m of 0.33% CuEq² from surface, extending mineralization to the east where it remains open

SLSE-25 was collared from a new central platform and drilled vertically with a small drill rig specifically used for infill purposes, returning 110m of 0.46% CuEq² from 32m depth within a broader interval, upgrading this area with near surface, high-grade mineralization

Identification of a second porphyry center in SLSE-28, with visual interpretation suggesting potential for some of the strongest grades to date at Warintza East – the new porphyry center is located south of SLSE-22, which exited a weakly mineralized dyke into stronger mineralization over its final 40m, consistent with increased grades observed from SLSE-16 in this area (192m of 0.70% CuEq² from 350m depth within a broader interval of 712m of 0.45% CuEq² - refer to press release dated January 17, 2023)

Mr. Jorge Fierro, Vice President, Exploration, commented: “Drilling to date confirms Warintza East as a significant porphyry deposit that adjoins Warintza Central and remains open for expansion, with a particular direction of focus to the south where extensional and step-out drilling is targeting higher grade mineralization associated with a newly identified southern porphyry center.”

Figure 1 – Plan View of Warintza East Drilling Released to Date

Table 1 – Assay Results
Hole ID Date Reported From
(m) To
(m) Interval
(m) Cu
(%) Mo
(%) Au
(g/t) CuEq²
(%)
SLSE-25 Apr 3, 2023 0 300 300 0.21 0.02 0.03 0.30
Including 32 142 110 0.35 0.02 0.03 0.46
SLSE-24 10 420 410 0.23 0.01 0.04 0.30
Including 18 242 224 0.33 0.02 0.06 0.43
Including 26 182 156 0.41 0.02 0.07 0.52
SLSE-23 0 746 746 0.36 0.02 0.04 0.46
Including 0 626 626 0.40 0.02 0.05 0.50
SLSE-22 26 1080 1054 0.18 0.01 0.03 0.24
SLSE-21 0 1040 1040 0.26 0.01 0.04 0.33
Including 92 290 198 0.33 0.01 0.04 0.40
SLSE-20 0 900 900 0.24 0.01 0.03 0.30
Including 4 296 292 0.35 0.02 0.04 0.45
SLSE-16 Jan 17, 2023 8 720 712 0.36 0.02 0.05 0.45
Including 76 184 108 0.46 0.02 0.06 0.57
Including 350 542 192 0.59 0.02 0.07 0.70

Notes to table: True widths of the mineralized zone are not known at this time.

Table 2 - Collar Location
Hole ID Easting Northing Elevation
(m) Depth
(m) Azimuth (degrees) Dip (degrees)
SLSE-25 801489 9648125 1170 300 0 -90
SLSE-24 801684 9648074 1221 722 250 -65
SLSE-23 801485 9648192 1170 748 0 -80
SLSE-22 801453 9647971 1234 1083 165 -80
SLSE-21 801684 9648074 1221 1071 90 -82
SLSE-20 801485 9648192 1170 905 90 -65
SLSE-16 801684 9648074 1221 845 225 -45
Notes to table: The coordinates are in WGS84 17S Datum.

Endnotes

Refer to Solaris’ technical report titled, “NI 43-101 Technical Report for the Warintza Project, Ecuador” with an effective date of April 1, 2022, prepared by Mario E. Rossi and filed on the Company’s SEDAR profile at www.sedar.com.
Copper-equivalence calculated as: CuEq (%) = Cu (%) + 4.0476 × Mo (%) + 0.487 × Au (g/t), utilizing metal prices of US$3.50/lb Cu, US$15.00/lb Mo, and US$1,500/oz Au, and assumes recoveries of 90% Cu, 85% Mo, and 70% Au based on preliminary metallurgical test work.

Technical Information and Quality Control & Quality Assurance

Sample assay results have been independently monitored through a quality control/quality assurance (“QA/QC”) program that includes the insertion of blind certified reference materials (standards), blanks and field duplicate samples. Logging and sampling are completed at a secured Company facility located in Quito, Ecuador. Drill core is cut in half on site and samples are securely transported to ALS Labs in Quito. Sample pulps are sent to ALS Labs in Lima, Peru and Vancouver, Canada for analysis. Total copper and molybdenum contents are determined by four-acid digestion with AAS finish. Gold is determined by fire assay of a 30-gram charge. In addition, selected pulp check samples are sent to Bureau Veritas lab in Lima, Peru. Both ALS Labs and Bureau Veritas lab are independent of Solaris. Solaris is not aware of any drilling, sampling, recovery or other factors that could materially affect the accuracy or reliability of the data referred to herein. ZTEM data quality was validated by a qualified external professional using data validation procedures under high industry standards, and the Company therefore did not deem it necessary to have such ZTEM data verified by a Qualified Person. Details on the surface sampling conducted at the Project are set out in the technical report titled, “NI 43-101 Technical Report for the Warintza Project, Ecuador” with an effective date of April 1, 2022, prepared by Mario E. Rossi and available on the Company’s SEDAR profile and website. The drillhole data has been verified by Jorge Fierro, M.Sc., DIC, PG, using data validation and quality assurance procedures under high industry standards.

Qualified Person

The scientific and technical content of this press release has been reviewed and approved by Jorge Fierro, M.Sc., DIC, PG, Vice President Exploration of Solaris who is a “Qualified Person” as defined in National Instrument 43-101 Standards of Disclosure for Mineral Projects. Jorge Fierro is a Registered Professional Geologist through the SME (registered member #4279075).

On behalf of the Board of Solaris Resources Inc.

“Daniel Earle”
President & CEO, Director