Riverside Resources Reports High-Grade Gold, Silver and Base Metal Assays from Phase 2 Field Work at La Union Project

Original announcement by tmx on May 5, 2026

Bullish

Company: Riverside Resources Inc.
Ticker: RRI
Exchange: TSX
Region: Sonora, Mexico
Primary commodity: Gold
Secondary commodities: Silver, Zinc, Lead, Copper
Document categories: Drill results
Extracted: 2026-08-26 06:37:18 UTC

Minestarters Atlas analysis

Summary

Riverside Resources reported high-grade gold, silver, and base metal assays from Phase 2 field work at its La Union Project in Sonora, Mexico. Sampling at the Union Mine and Union Norte targets returned significant results, including 0.6 m at 91.7 g/t gold and 1.0 m at 1,827 g/t silver. The program also defined three new target areas, with all results reinforcing drill targets for an upcoming Phase 2 drill program.

Reasoning: Riverside Resources reported high-grade gold, silver, and base metal assays from Phase 2 field work at its La Union Project, including bonanza grades from channel and selective samples, which validate the project's potential and define new targets for an upcoming drill program.

Positive factors

High-grade gold, silver, and base metal assays
Identification of three new target areas
True width disclosed for channel samples
Comprehensive QA/QC procedures reported
Results reinforce drill targets for upcoming program

Negative factors

Some silver overlimit assays are pending
Sampling is from channels and selective outcrops, not drill core
Cut-off grades for compositing are not explicitly stated

Facts used in scoring: 105

Atlas analysis — Riverside Resources Inc.: Riverside Resources Reports High-Grade Gold, Silver and Base Metal Assays from Phase 2 Field Work at La Union Project. 20 g/t over 2.9 m; 91.73 g/t over 0.6 m; 91.7 g/t over 0.6 m

Classification and evidence

True Width Disclosedpositive

Actual thickness perpendicular to structure is stated, not just downhole length.

Why it applies: The document explicitly states that 'Widths are true thickness as sampling was done perpendicular and on exposed material for all channel samples in this news release.'

Evidence · text

“Widths are true thickness as sampling was done perpendicular and on exposed material for all channel samples in this news release.”

QA/QC Disclosedpositive

Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods (blanks, standards, duplicates).

Why it applies: The release mentions a Qualified Person (Freeman Smith, P.Geo), the assay laboratory (ACT Labs), and specific QA/QC methods including fire assay, ICP/EOS, chain of custody, standards, blanks, and duplicates.

Evidence · text

“The scientific and technical data contained in this news release pertaining to the Project was reviewed and approved by Freeman Smith, P.Geo, a non-independent qualified person to Riverside Resources Inc., who is responsible for ensuring that the information provided in this news release is accurate and who acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects. All widths in this news release are within 90% or more of true actual thickness as these are from exposures where sampling was done perpendicular to the trend of the mineralized unit. Rock samples from the exploration program were shipped to ACT Labs in Zacatecas for preparation and analysis. Gold was analyzed using fire assay techniques. A 45 element ICP/EOS analysis using 4-acid digestion methods was used similar to the earlier assay work on the Project. Samples were maintained in chain of custody being delivered to the laboratory in sealed bags. Standards were inserted into the sample stream by Riverside every 20 samples and blanks inserted every 100 samples. The laboratory also inserts duplicates every 20 samples as an additional check on quality control. The QA/QC was analyzed with a check for any variations in the standards beyond 2 standard deviations and the standards passed.”

Step-Out Extensionpositive

Mineralization extended beyond the previously known limit.

Why it applies: The Union Mine exploration work focused on extending mineralization adjacent to and along strike from historic workings, and new target areas were defined.

Evidence · text

“The Union Mine exploration work has focused on extending mineralization adjacent to and along strike from the historic workings.”

Bonanza Interceptpositive